% File                : xuegen.tex
% Version             : 1.3
% Modified            : 8/18/92 11:46:38
% Additions/changes to: jin@sol1.lrsm.upenn.edu (Xuegen Jin -Luzzi)

\documentstyle[11pt,go]{article}
\textwidth=6.5truein
\textheight=8.9truein
\oddsidemargin=0pt
\topmargin=-24pt
\font\gosign=gosign50 at 50truept

\title{%
    \bf The Duel between the Grand Masters of \\
    Old and New Times:\\
    Zhou Lanyu (white) vs Guo Bailing
}
\author{%
    Cheng Xiaoliu (6~dan)\thanks{%
	Mr. Cheng Xiaoliu was born on January~26, 1949.
	He became 6~dan in 1982. He won 3rd and 5th place each once in the
	National Mens' Individual Championships. 
	He was also the challenger in 1982's New Physical Educational Cup
	against Nie Weiping but lost (2-3).
	He is now a reporter in the New Physical Education press and also a
	editor for the Chinese Go World magazine. The original Chinese
	version of this article was published in the Chinese Go World,
	Vol.~3, 1990.
    } \\[3in]
    \gosign\char0 \\
}

\begin{document}

\maketitle
\clearpage

\section{Introduction}


Guo Bailing was born in Wuxi county, Jiangsu Province. He was an
epoch-making figure in the history of Weiqi (Go) and was the leader of
the Go-playing society at the end of the Ming Dynasty and at the beginning
of the Qing Dynasty.

From the historic records, most of Guo's go activities were during the
Ming Dynasty and he was named as ``the No.1 Grand Master'' of
China then.  According to the {\sf Annals of Wuxi County}, Guo Bailing
was very good at playing go at a very young age and he was brought to the
Capital by the Prime Minister then and became very famous. So all the
high-level players from everywhere, far and wide, came to challenge
him. Guo outplayed everyone, so everyone respected him and named him
the ``Grand Master''.  Although {\sf the Annals} may over-praise a local
figure in order to publicize local figures, scenes, and social customs,
after all we can still see his majestic position looming large in the
go playing world then.

After entering the Qing Dynasty, although Guo was still active in the
go-playing world, he lost more games than he won.There are probably two
reasons for this: he was very old and had poor health, but his
techniques were also conservative and couldn't follow
the leaping changes with the times.

His most important contribution to go is his works. He presided over
editing and sorting out the masterpiece of the Ming Dynasty ``Xian Ji Wu
Ku'' (Tricks and Secrets of Gods). Not only were many errors corrected in
the previous versions, but many prevailing variations were added in
the new version.  The contents were greatly enriched. He also had three
widely circulated books: ``Endgame'', ``Handicap-3 Games'' and ``Handicap-4
Games''. The ``Endgame'' has various life and death problems of 1478
figures and still thought to be a masterpiece.  He had only twelve
games remaining today. Most of them were played against Zhou Lanyu.

Zhou Lanyu was born in Jiaxing County, Zhejiang Province and was a
unique figure at the beginning of the Qing Dynasty.

He played ten games with Guo Bailing and won most of them. He became
very famous since. He traveled around the country and played with
local players. He met Wang Hannian and Zhou Donghou of Anhui Province
(also two very famous players then) in Yangzhou and he outplayed both
of them. So the crown of No.1 {\sf Grand Master} belonged to him since.
He was a brilliant talent. It's a pity he died in his forties. But in
the legend it says he did not die, he sailed to an island in the Pacific
Ocean and stayed there
for the rest of his life. His understanding of Go is very deep and he
made very many good corrections in the techniques of local combat. For
example, in Dia.~1, in the ``Double Flying Swallows'' joseki, the usual
play for white is A, but he changed to the moves as shown. This new
variation up to move 9 is still in use today.


\gofontsize{10}
\pos{b}{14}=\black{8}
\pos{c}{14}=\black.
\pos{c}{15}=\white{7}
\pos{d}{13}=\black{6}
\pos{d}{14}=\white{5}
\pos{d}{16}=\white.
\pos{d}{17}=\white{9}
\pos{e}{15}=\letter{A}
\pos{e}{17}=\black{4}
\pos{f}{15}=\white{3}
\pos{f}{16}=\white{1}
\pos{f}{17}=\black.
\pos{g}{16}=\black{2}
\begin{figure}[htbp]
$$
\showdiagram a-i:11-19
$$
\inifulldiagram
\begin{center} Dia.~1 \end{center}
\end{figure}

\vspace*{-12truept}
\smallskip
Also, he paid attention to the balance of the whole board and proposed
`if you can get sente everywhere you will never lose'.  This
represented the gradual change of Chinese-style of playing from purely
stressing middle game combating to paying attention to the whole board
balance. This was very beneficial to the development of go techniques
then.

Next, let's enjoy one of the ten games between these two grand masters to
get to know about the fragments of the `duel' between them.

\section{Figure 1 Move 1 to 50}

% DIAGRAM 1  
%
\pos{d}{4}=\black.
\pos{d}{16}=\white.
\pos{f}{17}=\black{40}
%
\pos{k}{12}=\white{49}
%
\pos{l}{9}=\black{48}
\pos{l}{10}=\white{47}
\pos{l}{11}=\white{43}
\pos{l}{12}=\black{44}
%
\pos{m}{9}=\black{50}
\pos{m}{10}=\black{46}
\pos{m}{11}=\black{42}
\pos{m}{12}=\white{41}
\pos{m}{13}=\white{45}
%
\pos{n}{12}=\black{34}
\pos{n}{13}=\white{37}
\pos{n}{14}=\white{27}
\pos{n}{15}=\white{35}
\pos{n}{16}=\white{29}
\pos{n}{17}=\white{31}
\pos{n}{18}=\white{33}
%
\pos{o}{12}=\black{38}
\pos{o}{13}=\black{8}
\pos{o}{14}=\white{25}
\pos{o}{15}=\black{26}
\pos{o}{16}=\black{28}
\pos{o}{17}=\black{30}
\pos{o}{18}=\black{32}
%
\pos{p}{11}=\black{12}
\pos{p}{12}=\black{10}
\pos{p}{13}=\white{7}
\pos{p}{14}=\black{4}
\pos{p}{15}=\black{14}
\pos{p}{16}=\white{15}
\pos{p}{17}=\white{17}
\pos{p}{18}=\black{36}
%
\pos{q}{4}=\white.
\pos{q}{12}=\white{11}
\pos{q}{13}=\white{3}
\pos{q}{14}=\black{2}
\pos{q}{15}=\white{13}
\pos{q}{16}=\black.
\pos{q}{18}=\black{24}
%
\pos{r}{8}=\white{39}
\pos{r}{11}=\white{9}
\pos{r}{12}=\white{21}
\pos{r}{13}=\black{18}
\pos{r}{14}=\white{1}
\pos{r}{15}=\white{5}
\pos{r}{16}=\black{6}
%
\pos{s}{13}=\white{19}
\pos{s}{14}=\black{20}
\pos{s}{15}=\black{22}
\pos{s}{16}=\black{16}

\begin{figure}[htbp]
\gofontsize{15}
$$
\showfulldiagram
$$
\begin{center} $\textwhite{23}= \textblack{18}$ \end{center}
\begin{center}   Fig. 1  Move 1 to 50\end{center}
\end{figure}
\inifulldiagram
For white move 1, the black move 2 is called ``cover''. Guo liked the
``cover'' joseki most. Anytime his opponent played move 1 like this, he most
likely played the move 2 ``cover''. He made thorough study of all
variations involved. Although the ``cover'' joseki is very
thick, straightforward and easy to master, it has fewer variations
and has a drawback of being less effective.  So since then, the go
masters after Guo rarely used the ``cover'' joseki. It's a big improvement
from the historic point of view.

Black \textblack{10} is usually played at \textblack{28} to make black
strong, but here black plays \textblack{10} and \textblack{12} in
Figure~1 to make a change. White \textwhite{13} and \textwhite{15}
moves are a severe counterattack. If black \textblack{16} cuts as in
Dia.~2, black should know enough to deal with white's variations to
play move 2 first. One of the games between them proceeded in the
way as shown in Dia.~2, the result shows that white is better locally.

\pos{d}{16}=\white.
%
\pos{k}{17}=\white{16}
%
\pos{m}{14}=\black{15}
%
\pos{n}{14}=\black{5}
\pos{n}{15}=\white{6}
\pos{n}{16}=\white{10}
%
\pos{o}{13}=\black.
\pos{o}{14}=\black{11}
\pos{o}{15}=\white{12}
\pos{o}{16}=\black{7}
\pos{o}{18}=\white{14}
%
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white{8}
\pos{p}{18}=\black{13}
%
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black{9}
%
\pos{r}{11}=\white.
\pos{r}{13}=\black{1}
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{13}=\white{4}
\pos{s}{16}=\white{2}
\pos{s}{17}=\black{3}

\gofontsize{10}
\begin{figure}[htbp]
$$
\showdiagram a-t:10-19
$$
\begin{center} Dia. 2 \end{center}
\end{figure}
\inifulldiagram
\smallskip

White \textwhite{25}'s cut and atari is an inevitable move. If this
move is played as in Dia.~3, then black \textblack{2} will make a good
shape. When white plays move \textwhite{9} to avoid being attacked,
black \textblack{10} is a good move. Apparently,
it is disadvantageous for white.

%
\pos{n}{15}=\black{2}
\pos{n}{17}=\black{10}
%
\pos{o}{13}=\black.
%
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\white{1}
%
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{17}=\white{5}
\pos{q}{18}=\black.
\pos{q}{19}=\white{7}
%
\pos{r}{8}=\white{9}
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
\pos{r}{17}=\black{6}
\pos{r}{18}=\white{3}
%
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.
\pos{s}{18}=\black{4}
\pos{s}{19}=\black{8}

\gofontsize{10}
\begin{figure}[htbp]
$$
\showdiagram m-t:3-19
$$
\begin{center} Dia.~3 \end{center}
\end{figure}
\inifulldiagram


Black \textblack{28} bending is not a good move, this move should be
played as move 1 in Dia.~4. Although white may play A to make a seki,
white also have defects, so black's situation is better than in
Figure~1.

% DIAGRAM 3
%
\pos{d}{4}=\black.
\pos{d}{16}=\white.
%
%
\pos{l}{18}=\white{8}
\pos{l}{12}=\black{13}
%
\pos{m}{14}=\white{10}
\pos{m}{15}=\white{2}
\pos{m}{16}=\white{4}
\pos{m}{17}=\white{6}
\pos{m}{18}=\black{7}
%
\pos{n}{12}=\black{11}
\pos{n}{14}=\white.
\pos{n}{15}=\black{1}
\pos{n}{16}=\black{3}
\pos{n}{17}=\black{5}
\pos{n}{18}=\black{9}
%
%
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
%
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\letter{A}
%
\pos{q}{4}=\white.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{8}=\white{12}
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{10}
$$
\showfulldiagram
$$
\begin{center} Dia.~4 \end{center}
\end{figure}
\inifulldiagram

White \textwhite{29} succeeds in building a wall and potential by
giving up two stones. After white \textwhite{39}, although black gets
18 points at the lower-right corner, the central black group is very
weak. It will be a very large burden for black in
future combat. Up to now, white obtains some advantage from the
lower-right corner fight.

Black \textblack{40} is not good, it should be played at \textblack{1}
as shown in Dia.~5. It's a crucial point for the whole board. Next,
regardless where white plays, for example, \textwhite{2} or position A,
black can play \textblack{3} to limit white's future development
first, then play \textblack{5}. If the game proceeds like this, the
game is still a long way to go.

%
\pos{d}{4}=\black.
\pos{d}{16}=\white.
%
\pos{g}{17}=\letter{A}
%
\pos{h}{16}=\white{2}
%
\pos{k}{4}=\black{5}
\pos{k}{15}=\black{3}
\pos{k}{17}=\white{4}
%
\pos{l}{12}=\black{1}
%
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{4}=\white.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{8}=\white.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{10}
$$
\showfulldiagram
$$
\begin{center} Dia.~5 \end{center}
\end{figure}
\inifulldiagram

After white's quick-witted moves \textwhite{41} and \textwhite{43}, the
white wall is thicker and thicker, and the influence is stronger and
stronger.

Black \textblack{48} is very reluctant, but black has to manage to play
here. Otherwise, when white plays at \textblack{48}, then the whole
board is more unfavorable to black. White \textwhite{49} is weak, this
move should have been played at \textblack{50}. Regardless wherever
black plays, white will be in an advantageous position in fighting.
After black \textblack{50} avoids the cut, the tension in the central
part is relaxed a little bit, but overall, white is still leading.


\section{Figure 2 Move 51 to 100}

%
\pos{a}{18}=\black{62}
%
\pos{b}{2}=\black{82}
\pos{b}{3}=\white{81}
\pos{b}{4}=\white{77}
\pos{b}{11}=\black{78}
\pos{b}{13}=\white{79}
\pos{b}{17}=\white{61}
\pos{b}{18}=\black{60}
%    
\pos{c}{3}=\black{80}
\pos{c}{6}=\white{73}
\pos{c}{7}=\letter{C}
\pos{c}{8}=\black{74}
\pos{c}{17}=\white{57}
\pos{c}{18}=\black{56}
%
\pos{d}{4}=\black.
\pos{d}{11}=\white{71}
\pos{d}{16}=\white.
\pos{d}{17}=\white{59}
\pos{d}{18}=\white{53}
\pos{d}{14}=\letter{A}
\pos{d}{19}=\black{58}
%
\pos{e}{2}=\black{88}
\pos{e}{6}=\white{75}
\pos{e}{8}=\black{76}
\pos{e}{13}=\white{69}
\pos{e}{14}=\white{65}
\pos{e}{15}=\white{63}
\pos{e}{17}=\letter{B}
\pos{e}{18}=\black{54}
%
\pos{f}{2}=\black{84}
\pos{f}{3}=\white{87}
\pos{f}{4}=\white{83}
\pos{f}{12}=\black{70}
\pos{f}{13}=\black{68}
\pos{f}{14}=\black{64}
\pos{f}{15}=\black{52}
\pos{f}{17}=\black.
%
\pos{g}{2}=\white{85}
\pos{g}{3}=\black{86}
\pos{g}{4}=\black{90}
\pos{g}{5}=\white{91}
\pos{g}{6}=\black{100}
\pos{g}{17}=\black{66}
%
\pos{h}{2}=\white{89}
\pos{h}{3}=\white{93}
\pos{h}{4}=\black{94}
\pos{h}{5}=\black{96}
\pos{h}{14}=\black{72}
\pos{h}{15}=\white{55}
\pos{h}{17}=\white{51}
\pos{h}{18}=\white{67}
%
\pos{i}{3}=\black{92}
\pos{i}{4}=\white{95}
\pos{i}{5}=\black{98}
%
\pos{k}{3}=\white{97}
\pos{k}{4}=\white{99}
\pos{k}{12}=\white.
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white.
\pos{l}{12}=\black.
%
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
%
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{4}=\white.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{8}=\white.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{15}
$$
\showfulldiagram
$$
\begin{center}   Fig.~2  Move 51 to 100\end{center}
\end{figure}
\inifulldiagram

White \textwhite{53} is too aggressive. This belongs to the old way of
playing go which stresses giving no place for the opponent to settle
down. But at this time, since black is unable to get settled down
immediately at the right edge, it's not necessary for white to press so
hard on black. White \textwhite{53} should be played at A. Even if
white wants to press hard on black to avoid black to ignore him, white
should play at B.

But black \textblack{54} is unreasonable. At this time, black itself is
very weak here, there is no time for black trying to disconnect the white
groups. Black \textblack{54} should be played at \textblack{1} as shown
in Dia.~6, if white plays \textwhite{2},
black can play \textblack{3} to get a good shape and reduce some
white's future territory while white has to worry about black's
escaping from A. So when black plays \textblack{3}, white has no
effective measures to attack black here.

%
\pos{d}{4}=\black.
\pos{d}{14}=\white{2}
\pos{d}{16}=\white.
\pos{d}{18}=\white.
%
\pos{f}{15}=\black.
\pos{f}{17}=\black.
%
\pos{h}{15}=\black{1}
\pos{h}{17}=\white.
%
\pos{i}{17}=\black{3}
%
\pos{k}{12}=\white.
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white.
\pos{l}{12}=\black.
\pos{l}{13}=\letter{A}
%
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{4}=\white.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{8}=\white.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{10}
$$
\showdiagram a-t:8-19
$$
\begin{center} Dia.~6 \end{center}
\end{figure}
\inifulldiagram


After white makes a jump (\textwhite{55}), black \textblack{56} is too
early to invade the corner, especially black's \textblack{62} is
not urgent. As in Dia.~7, black should play \textblack{1} first to get
out, when white plays \textwhite{2}, then black comes back to invade
the corner. If the game is proceeding this way, black's situation is
much better than in Figure~2.

\pos{b}{18}=\black{11}
%
\pos{c}{14}=\white{2}
\pos{c}{17}=\white{4}
\pos{c}{18}=\black{3}
%
\pos{d}{16}=\white.
\pos{d}{17}=\white{6}
\pos{d}{18}=\white.
\pos{d}{19}=\black{5}
%
\pos{e}{14}=\black{1}
\pos{e}{18}=\black.
%
\pos{f}{15}=\black.
\pos{f}{17}=\black.
%
\pos{h}{17}=\white.
\pos{h}{15}=\white.
\pos{h}{16}=\white{10}
\pos{h}{18}=\black{7}
%
\pos{g}{17}=\black{9}
\pos{i}{18}=\white{8}
%
\pos{k}{12}=\white.
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white.
\pos{l}{12}=\black.
%
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{4}=\white.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{8}=\white.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\black.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
%
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{10}
$$
\showdiagram a-n:8-19
$$
\begin{center} Dia.~7 \end{center}
\end{figure}
\inifulldiagram
%


White \textwhite{63} is the crucial point for attacking. Black has to
play \textblack{66} (point-losing move) in order to avoid being cut.
After \textwhite{71}, black's situation is more unfavorable. Black
\textblack{72} is not urgent, this move should have been played at C
in order to keep the balance of the whole board's territory regardless
what happened! When white plays \textwhite{73}, black looks like he is
going to lose.

In the first half game, Zhou made use of several questionable moves by
Guo and took advantage by actively attacking black. This shows his good
whole-board balance sense and flexible playing style.

Black \textblack{74}'s invasion is tenacious. If black couldn't mess up
the situation here, black might have no chance to compete with white.
White \textwhite{77} starts a wrong sequence, this move should have been
played as \textwhite{1} in Dia.~8. After black's connection, white can
get out by \textwhite{3} and \textwhite{5}. As several black groups are
not safe all together, black will have a difficult struggle. In Dia.~8,
it is not good for black to play A any more, because white can play B,
black C, white D, black E, white F.

\pos{a}{18}=\black.
%
\pos{b}{4}=\black{6}
\pos{b}{5}=\white{7}
\pos{b}{9}=\letter{B}
\pos{b}{10}=\letter{D}
\pos{b}{11}=\letter{A}
\pos{b}{17}=\white.
\pos{b}{18}=\black.
%
\pos{c}{6}=\white.
\pos{c}{9}=\letter{C}
\pos{c}{10}=\letter{E}
\pos{c}{11}=\letter{F}
\pos{c}{8}=\black.
\pos{c}{17}=\white.
\pos{c}{18}=\black.
%
\pos{d}{4}=\black.
\pos{d}{11}=\white.
\pos{d}{8}=\black{2}
\pos{d}{9}=\white{1}
\pos{d}{16}=\white.
\pos{d}{17}=\white.
\pos{d}{18}=\white.
\pos{d}{19}=\black.

%
\pos{e}{6}=\white.
\pos{e}{8}=\black.
\pos{e}{13}=\white.
\pos{e}{14}=\white.
\pos{e}{15}=\white.
\pos{e}{18}=\black.
%
\pos{f}{3}=\black{4}
\pos{f}{5}=\white{3}
\pos{f}{10}=\white{5}
\pos{f}{12}=\black.
\pos{f}{13}=\black.
\pos{f}{14}=\black.
\pos{f}{15}=\black.
\pos{f}{17}=\black.
%
\pos{g}{17}=\black.
%
\pos{h}{14}=\black.
\pos{h}{15}=\white.
\pos{h}{17}=\white.
\pos{h}{18}=\white.
%
\pos{k}{12}=\white.
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white.
\pos{l}{12}=\black.
%
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
%
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{4}=\white.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{8}=\white.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\black.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.
\begin{figure}[htbp]
\gofontsize{10}
$$
\showdiagram a-n:1-19
$$
\begin{center}   Dia.~8 \end{center}
\end{figure}
\inifulldiagram

When white plays \textwhite{81}, black \textblack{82} is unreasonable
and makes very few points. Black \textblack{82} should be played at
\textblack{86} to free itself from the predicament. White
\textwhite{83} and \textwhite{85} are severe, although black
\textblack{88} is very inconvenient, it is a must for black. Otherwise,
black doesn't have enough territory to compete if black gives up this
corner.

White \textwhite{93} and \textwhite{95} makes a strategic mistake to
get one black stone. As in Dia.~9, white \textwhite{1} and
\textwhite{3} is a beautiful sacrifice technique, after white
\textwhite{7}, white takes overall advantage, because the central
black group is very weak. When black plays \textblack{8} to strengthen
the center, white \textwhite{9} and \textwhite{11} are sente moves. If the
game proceeds this way, black has no target to attack and has no hope
for the game.

\pos{a}{18}=\black.
%
\pos{b}{2}=\black.
\pos{b}{3}=\white.
\pos{b}{4}=\white.
\pos{b}{9}=\white{11}
\pos{b}{11}=\black.
\pos{b}{13}=\white.
\pos{b}{17}=\white.
\pos{b}{18}=\black.
%
\pos{c}{3}=\black.
\pos{c}{6}=\white.
\pos{c}{8}=\black.
\pos{c}{17}=\white.
\pos{c}{18}=\black.
%
\pos{d}{4}=\black.
\pos{d}{8}=\black{10}
\pos{d}{9}=\white{9}
\pos{d}{11}=\white.
\pos{d}{16}=\white.
\pos{d}{17}=\white.
\pos{d}{18}=\white.
\pos{d}{19}=\black.
%
\pos{e}{2}=\black.
\pos{e}{6}=\white.
\pos{e}{8}=\black.
\pos{e}{13}=\white.
\pos{e}{14}=\white.
\pos{e}{15}=\white.
\pos{e}{18}=\black.
%
\pos{f}{2}=\black.
\pos{f}{3}=\white.
\pos{f}{4}=\white.
\pos{f}{12}=\black.
\pos{f}{13}=\black.
\pos{f}{14}=\black.
\pos{f}{15}=\black.
\pos{f}{17}=\black.
%
\pos{g}{1}=\black{6}
\pos{g}{2}=\white.
\pos{g}{3}=\black.
\pos{g}{4}=\black.
\pos{g}{5}=\white.
\pos{g}{17}=\black.
%
\pos{h}{2}=\white.
\pos{h}{3}=\black{2}
\pos{h}{14}=\black.
\pos{h}{15}=\white.
\pos{h}{17}=\white.
\pos{h}{18}=\white.
%
\pos{i}{2}=\black{4}
\pos{i}{3}=\black.
\pos{i}{4}=\white{1}
%
\pos{k}{2}=\white{5}
\pos{k}{3}=\white{3}
\pos{k}{4}=\white{7}
\pos{k}{12}=\white.
%
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white.
\pos{l}{12}=\black.
%
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
%
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{8}=\black{8}
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{4}=\white.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{8}=\white.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{10}
$$
\showfulldiagram
$$
\begin{center}   Dia.~9 \end{center}
\end{figure}
\inifulldiagram

After black \textblack{100}'s atari, the upper-left corner white group
stones are already hurt, and black's central group is greatly
strengthened.

\section{Figure 3 Move 101 to 172}

% DIAGRAM 3
%
\pos{a}{2}=\white{15}
\pos{a}{8}=\black{14}
\pos{a}{18}=\black.
%
\pos{b}{2}=\black.
\pos{b}{3}=\white.
\pos{b}{4}=\white.
\pos{b}{6}=\white{13}
\pos{b}{7}=\black{12}
\pos{b}{8}=\white{3}
\pos{b}{9}=\black{4}
\pos{b}{11}=\black.
\pos{b}{13}=\white.
\pos{b}{17}=\white.
\pos{b}{18}=\black.
%
\pos{c}{2}=\black{16}
\pos{c}{3}=\black.
\pos{c}{4}=\white{1}
\pos{c}{6}=\white.
\pos{c}{7}=\white{5}
\pos{c}{8}=\black.
\pos{c}{17}=\white.
\pos{c}{18}=\black.
%
\pos{d}{3}=\black{2}
\pos{d}{4}=\black.
\pos{d}{5}=\white{7}
\pos{d}{7}=\white{17}
\pos{d}{9}=\black{6}
\pos{d}{11}=\white.
\pos{d}{16}=\white.
\pos{d}{17}=\white.
\pos{d}{18}=\white.
\pos{d}{19}=\black.
%
\pos{e}{2}=\black.
\pos{e}{6}=\white.
\pos{e}{8}=\black.
\pos{e}{13}=\white.
\pos{e}{14}=\white.
\pos{e}{15}=\white.
\pos{e}{16}=\black{66}
\pos{e}{17}=\white{67}
\pos{e}{18}=\black.
%
\pos{f}{2}=\black.
\pos{f}{3}=\white.
\pos{f}{4}=\white.
\pos{f}{5}=\black{8}
\pos{f}{12}=\black.
\pos{f}{13}=\black.
\pos{f}{14}=\black.
\pos{f}{15}=\black.
\pos{f}{16}=\white{63}
\pos{f}{17}=\black.
%
\pos{g}{2}=\white.
\pos{g}{3}=\black.
\pos{g}{4}=\black.
\pos{g}{5}=\white.
\pos{g}{6}=\black.
\pos{g}{11}=\black{72}
\pos{g}{12}=\white{69}
\pos{g}{13}=\white{71}
\pos{g}{14}=\white{61}
\pos{g}{15}=\white{65}
\pos{g}{16}=\black{64}
\pos{g}{17}=\black.
\pos{g}{18}=\black{68}
%
\pos{h}{2}=\white.
\pos{h}{3}=\white.
\pos{h}{4}=\black.
\pos{h}{5}=\black.
\pos{h}{11}=\black{70}
\pos{h}{12}=\black{62}
\pos{h}{13}=\white{59}
\pos{h}{14}=\black.
\pos{h}{15}=\white.
\pos{h}{17}=\white.
\pos{h}{18}=\white.
%
\pos{i}{3}=\black.
\pos{i}{4}=\white.
\pos{i}{5}=\black.
\pos{i}{12}=\white{51}
\pos{i}{13}=\black{58}
\pos{i}{14}=\white{49}
\pos{i}{15}=\white{47}
%
\pos{k}{3}=\white.
\pos{k}{4}=\white.
\pos{k}{10}=\black{52}
\pos{k}{11}=\black{50}
\pos{k}{12}=\white.
\pos{k}{13}=\black{56}
\pos{k}{14}=\black{46}
\pos{k}{15}=\black{54}
\pos{k}{16}=\white{57}
%
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white{\triangle}
\pos{l}{12}=\black.
\pos{l}{13}=\black{48}
\pos{l}{14}=\white{55}
\pos{l}{15}=\white{53}
%
\pos{m}{3}=\white{45}
\pos{m}{4}=\black{44}
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
%
\pos{n}{3}=\white{39}
\pos{n}{7}=\black{40}
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{3}=\white{9}
\pos{o}{4}=\black{38}
\pos{o}{5}=\black{34}
\pos{o}{8}=\white{35}
\pos{o}{10}=\black{42}
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{3}=\black{32}
\pos{p}{4}=\black{30}
\pos{p}{5}=\white{33}
\pos{p}{6}=\black{18}
\pos{p}{7}=\black{26}
\pos{p}{8}=\white{19}
\pos{p}{9}=\white{43}
\pos{p}{10}=\white{41}
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{3}=\black{36}
\pos{q}{4}=\white.
\pos{q}{5}=\black{28}
\pos{q}{6}=\white{27}
\pos{q}{7}=\white{25}
\pos{q}{8}=\black{24}
\pos{q}{9}=\black{22}
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{5}=\white{31}
\pos{r}{6}=\black{10}
\pos{r}{7}=\white{29}
\pos{r}{8}=\white.
\pos{r}{9}=\black{20}
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{4}=\white{11}
\pos{s}{8}=\white{23}
\pos{s}{9}=\white{21}
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{15}
$$
\showfulldiagram
$$
\begin{center} $\textwhite{37}= \textblack{28} {\hskip .5cm}   \textblack{60} = \textwhite{\triangle}$ \end{center}
\begin{center}   Fig.~3  Move 101 to 172  \end{center}
\end{figure}
\inifulldiagram

% DIAGRAM 3

White \textwhite{3} and {5} suffers a big loss by giving black a good
shape. White makes such awkward moves in order to be safe but plays a
wrong order. White should play, as in Dia.~10, \textwhite{1},
after black's \textblack{2}, white \textwhite{3}
and \textwhite{5} are correct order. After black's \textblack{6},
white \textwhite{7} sticking is critical. These two white stones
threaten the safety of the central black group and must be saved. If
black plays \textblack{8} to make itself safe, white \textwhite{9}
cuts the black here. It's very powerful for white to keep itself safe
and attack black at the same time. When black plays \textblack{14} to
strengthen the central group, white could take the opportunity to keep
the edge. Compared to Fig.~3, this result is much advantageous for
white.

\pos{a}{2}=\white{1}
\pos{a}{18}=\black.
%
\pos{b}{2}=\black.
\pos{b}{3}=\white.
\pos{b}{4}=\white.
\pos{b}{8}=\white{3}
\pos{b}{9}=\black{4}
\pos{b}{11}=\black.
\pos{b}{13}=\white.
\pos{b}{17}=\white.
\pos{b}{18}=\black.
%
\pos{c}{2}=\black{2}
\pos{c}{3}=\black.
\pos{c}{6}=\white.
\pos{c}{7}=\white{5}
\pos{c}{8}=\black.
\pos{c}{17}=\white.
\pos{c}{18}=\black.
%
\pos{d}{1}=\black{8}
\pos{d}{3}=\black.
\pos{d}{4}=\black.
\pos{d}{9}=\black{6}
\pos{d}{11}=\white.
\pos{d}{16}=\white.
\pos{d}{17}=\white.
\pos{d}{18}=\white.
\pos{d}{19}=\black.
%
\pos{e}{2}=\black.
\pos{e}{6}=\white.
\pos{e}{8}=\black.
\pos{e}{13}=\white.
\pos{e}{14}=\white.
\pos{e}{15}=\white.
\pos{e}{18}=\black.
%
\pos{f}{2}=\black.
\pos{f}{3}=\white.
\pos{f}{4}=\white.
\pos{f}{5}=\white{7}
\pos{f}{12}=\black.
\pos{f}{13}=\black.
\pos{f}{14}=\black.
\pos{f}{15}=\black.
\pos{f}{17}=\black.
%
\pos{g}{2}=\white.
\pos{g}{3}=\black.
\pos{g}{4}=\black.
\pos{g}{5}=\white.
\pos{g}{6}=\black.
\pos{g}{7}=\white{13}
\pos{g}{17}=\black.
%
\pos{h}{2}=\white.
\pos{h}{3}=\white.
\pos{h}{4}=\black.
\pos{h}{5}=\black.
\pos{h}{6}=\white{9}
\pos{h}{7}=\white{11}
\pos{h}{14}=\black.
\pos{h}{15}=\white.
\pos{h}{17}=\white.
\pos{h}{18}=\white.
%
\pos{i}{3}=\black.
\pos{i}{4}=\white.
\pos{i}{5}=\black.
\pos{i}{6}=\black{10}
\pos{i}{7}=\black{12}
%
\pos{k}{3}=\white.
\pos{k}{4}=\white.
\pos{k}{12}=\white.
%
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white.

\pos{l}{12}=\black.
%
\pos{m}{6}=\black{14}
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
%
\pos{n}{4}=\white{15}
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{4}=\white.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{8}=\white.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{10}
$$
\showdiagram a-t:1-16
$$
\begin{center}   Dia.~10 \end{center}
\end{figure}
\inifulldiagram
% DIAGRAM 3

After black \textblack{8} gets one white stone, even \textblack{12} and
\textblack{14} become sente, the weak black parts are greatly
strengthened and now black has time to fight back. White \textwhite{11}
is a little slow, it is not as good as \textwhite{31} to make black
heavier and easier for white to attack black. But, even after white
\textwhite{19}'s jump, black still faces great difficulty, if black
simply escapes \textblack{10} and \textblack{19} stones. Overall, white
is still leading.

Black \textblack{20} is a do-or-die move like burning black's own
boat. If black doesn't make unusual plays, black has no way to change
the situation. At this life-and-death point, the following moves by
white are very weak. White should calculate the variations and make
face-to-face fight with \textblack{20}.

\pos{a}{18}=\black.
%
\pos{b}{2}=\black.
\pos{b}{3}=\white.
\pos{b}{4}=\white.
\pos{b}{11}=\black.
\pos{b}{13}=\white.
\pos{b}{17}=\white.
\pos{b}{18}=\black.
%
\pos{c}{3}=\black.
\pos{c}{6}=\white.
\pos{c}{8}=\black.
\pos{c}{17}=\white.
\pos{c}{18}=\black.
%

\pos{d}{4}=\black.
\pos{d}{11}=\white.
\pos{d}{16}=\white.
\pos{d}{17}=\white.
\pos{d}{18}=\white.
\pos{d}{19}=\black.
%
\pos{e}{2}=\black.
\pos{e}{6}=\white.
\pos{e}{8}=\black.
\pos{e}{13}=\white.
\pos{e}{14}=\white.
\pos{e}{15}=\white.
\pos{e}{18}=\black.
%
\pos{f}{2}=\black.
\pos{f}{3}=\white.
\pos{f}{4}=\white.
\pos{f}{12}=\black.
\pos{f}{13}=\black.
\pos{f}{14}=\black.
\pos{f}{15}=\black.
\pos{f}{17}=\black.
%
\pos{g}{2}=\white.
\pos{g}{3}=\black.
\pos{g}{4}=\black.
\pos{g}{5}=\white.
\pos{g}{6}=\black.
\pos{g}{17}=\black.
%
\pos{h}{2}=\white.
\pos{h}{3}=\white.
\pos{h}{4}=\black.
\pos{h}{5}=\black.
\pos{h}{14}=\black.
\pos{h}{15}=\white.
\pos{h}{17}=\white.
\pos{h}{18}=\white.

\pos{i}{3}=\black.
\pos{i}{4}=\white.
\pos{i}{5}=\black.
%
\pos{k}{3}=\white.
\pos{k}{4}=\white.
\pos{k}{12}=\white.
%
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white.
\pos{l}{12}=\black.
%
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
%
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{3}=\white.
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{6}=\black.
\pos{p}{8}=\white.
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{4}=\white.
\pos{q}{8}=\white{7}
\pos{q}{9}=\white{1}
\pos{q}{10}=\white{3}
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{6}=\black.
\pos{r}{7}=\black{6}
\pos{r}{8}=\white.
\pos{r}{9}=\black.
\pos{r}{10}=\black{2}
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{4}=\white.
\pos{s}{6}=\black{8}
\pos{s}{7}=\white{5}
\pos{s}{8}=\black{4}
\pos{s}{9}=\white{9}
\pos{s}{10}=\white{11}
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.
%
\pos{t}{7}=\black{10}
\begin{figure}[htbp]
\gofontsize{10}
$$
\showdiagram k-t:1-19
$$
\begin{center}   Dia.~11 \end{center}
\end{figure}
\inifulldiagram
%

As in Dia.~11, white \textwhite{1} is the strongest defense. If black
\textblack{2} and \textblack{4} attempts to connect, white
\textwhite{5} is a good move, if black \textblack{8} atari one white
stone, after white gets two black stones, not only the left
\textblack{4} and \textblack{8} group is not safe yet, but the central
black group also becomes weak. If the result is like this, black
doesn't get any advantage here.

\pos{k}{3}=\white.
\pos{k}{4}=\white.
\pos{k}{12}=\white.
%
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white.
\pos{l}{12}=\black.
%
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
%
\pos{n}{7}=\letter{B}
\pos{n}{11}=\black{16}
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{3}=\white.
\pos{o}{10}=\white{15}
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{6}=\black.
\pos{p}{8}=\white.
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
%
\pos{q}{4}=\white.
\pos{q}{8}=\white{7}
\pos{q}{9}=\white{1}
\pos{q}{10}=\white{3}
\pos{q}{11}=\black{10}
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{5}=\white{17}
\pos{r}{6}=\black.
\pos{r}{7}=\black{6}
\pos{r}{8}=\white.
\pos{r}{9}=\black.
\pos{r}{10}=\black{2}
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{4}=\white.
\pos{s}{6}=\white{9}
\pos{s}{7}=\white{5}
\pos{s}{8}=\black{4}
\pos{s}{10}=\black{8}
\pos{s}{11}=\white{11}
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.
%
\pos{t}{7}=\white{19}
\pos{t}{8}=\letter{A}
\pos{t}{9}=\black{12}
\pos{t}{10}=\white{21}
\pos{t}{11}=\black{20}
\pos{t}{12}=\white{13}
\pos{t}{13}=\black{18}
\pos{t}{14}=\black{14}
\begin{figure}[htbp]
\gofontsize{10}
$$
\showdiagram k-t:1-19
$$

\begin{center}   Dia.~12 \end{center}
\end{figure}
\inifulldiagram

If as in Dia.~12, black plays \textblack{8} this side, white calmly
connects from below. If white \textwhite{9} is played at position A,
black may play \textblack{12} to make a ko, the situation will be very
complex. If white \textwhite{9} is erroneously played at
\textblack{12}, after black plays at \textwhite{19} to atari a white
stone, white will get nothing.

As in Dia.~12, if ko situation occurs, white's burden is not heavy,
even if white fails to win the ko, once white plays position B to
escape, the overall advantage is still in white's hand.

\pos{k}{3}=\white.
\pos{k}{4}=\white.
\pos{k}{12}=\white.
%
%
\pos{l}{9}=\black.
\pos{l}{10}=\white.
\pos{l}{11}=\white.
\pos{l}{12}=\black.
%
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
%
\pos{n}{3}=\white{15}
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{3}=\white.
\pos{o}{4}=\black{14}
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{2}=\white{13}
\pos{p}{3}=\black{12}
\pos{p}{4}=\black{10}
\pos{p}{6}=\black.
\pos{p}{8}=\white.
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
%
\pos{q}{2}=\white{11}
\pos{q}{3}=\black{8}
\pos{q}{4}=\white.
\pos{q}{9}=\white{1}
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{3}=\white{5}
\pos{r}{4}=\black{4}
\pos{r}{5}=\black{2}
\pos{r}{6}=\black.
\pos{r}{8}=\white.
\pos{r}{9}=\black.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{2}=\white{7}
\pos{s}{3}=\black{6}
\pos{s}{4}=\white.
\pos{s}{7}=\white{3}
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.
%
\pos{t}{3}=\white{9}

\begin{figure}[htbp]
\gofontsize{10}
$$
\showdiagram k-t:1-19
$$

\begin{center}   Dia.~13 \end{center}
\end{figure}
\inifulldiagram

If black plays \textblack{2} as in Dia.~13, white can play
\textwhite{3}. As proceeded up to \textwhite{15}, the black left and
right groups are still not safe yet. Black will have no chance to come
back.

As the game continues in Fig.~3, when white \textwhite{19} is cut by
black, white already suffers. White \textwhite{27} in Fig.~3 is not good
again and white should restrain to play at \textwhite{29}. After black
\textblack{30} and \textblack{32} break the
left edge, white's loss increases. When black plays \textblack{46}
jump, white \textwhite{47} should be played at \textblack{48} to get
one stone, black can't empty white's left edge territory completely,
then the game is still close. If white lost this game, white
\textwhite{47} would be the cause.

Black \textblack{50}'s atari is very powerful. White has to give up two
stones. If white plays at \textblack{52}, black can play at
\textwhite{51} to counter-atari, white has no way to capture black.

When the game proceeds to black \textblack{72}, the central black group
is very thick and strong, and have the potential to form some
territory. Now, black has the advantage.

From black \textblack{20}, Guo's strong fighting capability was
carried out vividly and thoroughly.

\section{Figure 4 Move 173 to 239}
%

%
\pos{a}{2}=\white.
\pos{a}{8}=\black.
\pos{a}{16}=\black{42}
\pos{a}{17}=\black{40}
\pos{a}{18}=\black.
%
\pos{b}{2}=\black.
\pos{b}{3}=\white.
\pos{b}{4}=\white.
\pos{b}{6}=\white.
\pos{b}{7}=\black.
\pos{b}{9}=\black.
\pos{b}{10}=\black{24}
\pos{b}{11}=\black.
\pos{b}{12}=\white{23}
\pos{b}{13}=\white.
\pos{b}{15}=\white{43}
\pos{b}{16}=\white{41}
\pos{b}{17}=\white.
\pos{b}{18}=\black.
%
\pos{c}{2}=\black.
\pos{c}{3}=\black.
\pos{c}{4}=\white.
\pos{c}{6}=\white.
\pos{c}{7}=\white.
\pos{c}{8}=\black.
\pos{c}{10}=\white{15}
\pos{c}{11}=\black{18}
\pos{c}{12}=\white{21}
\pos{c}{17}=\white.
\pos{c}{18}=\black.
%
\pos{d}{3}=\black.
\pos{d}{4}=\black.
\pos{d}{5}=\white.
\pos{d}{7}=\white.
\pos{d}{8}=\white{63}
\pos{d}{9}=\black.
\pos{d}{10}=\black{22}
\pos{d}{11}=\white.
\pos{d}{16}=\white.
\pos{d}{17}=\white.
\pos{d}{18}=\white.
\pos{d}{19}=\black.
%
\pos{e}{2}=\black.
\pos{e}{5}=\black{8}
\pos{e}{6}=\white.
\pos{e}{7}=\white{9}
\pos{e}{8}=\black.
\pos{e}{9}=\black{64}
\pos{e}{12}=\white{5}
\pos{e}{13}=\white.
\pos{e}{14}=\white.
\pos{e}{15}=\white.
\pos{e}{16}=\black{\triangle}
\pos{e}{17}=\white.
\pos{e}{18}=\black.
\pos{e}{19}=\black{14}
%
\pos{f}{2}=\black.
\pos{f}{3}=\white.
\pos{f}{4}=\white.
\pos{f}{5}=\black.
\pos{f}{7}=\white{55}
\pos{f}{8}=\black{16}
\pos{f}{10}=\white{7}
\pos{f}{11}=\white{3}
\pos{f}{12}=\black.
\pos{f}{13}=\black.
\pos{f}{14}=\black.
\pos{f}{15}=\black.
\pos{f}{16}=\white{1}
\pos{f}{17}=\black.
\pos{f}{19}=\white{13}
%
\pos{g}{2}=\white.
\pos{g}{3}=\black.
\pos{g}{4}=\black.
\pos{g}{6}=\black.
\pos{g}{7}=\white{57}
\pos{g}{8}=\black{56}
\pos{g}{9}=\letter{A}
\pos{g}{10}=\white{19}
\pos{g}{11}=\black.
\pos{g}{12}=\white.
\pos{g}{13}=\white.
\pos{g}{14}=\white.
\pos{g}{15}=\white.
\pos{g}{16}=\black.
\pos{g}{17}=\black.
\pos{g}{18}=\black.
\pos{g}{19}=\black{2}
%
\pos{h}{2}=\white.
\pos{h}{3}=\white.
\pos{h}{4}=\black.
\pos{h}{5}=\black.
\pos{h}{7}=\black{58}
\pos{h}{8}=\white{33}
\pos{h}{10}=\white{17}
\pos{h}{11}=\black.
\pos{h}{12}=\black.
\pos{h}{13}=\white.
\pos{h}{15}=\white.
\pos{h}{16}=\white{37}
\pos{h}{17}=\white.
\pos{h}{18}=\white.
\pos{h}{19}=\black{32}
%
\pos{i}{3}=\black.
\pos{i}{4}=\white.
\pos{i}{5}=\black.
\pos{i}{7}=\black{34}
\pos{i}{8}=\white{59}
\pos{i}{11}=\black{20}
\pos{i}{12}=\white.
\pos{i}{13}=\black.
\pos{i}{14}=\white.
\pos{i}{15}=\white.
\pos{i}{18}=\black{38}
%
\pos{k}{2}=\white{67}
\pos{k}{3}=\white.
\pos{k}{4}=\white.
\pos{k}{5}=\black{10}
\pos{k}{8}=\black{60}
\pos{k}{10}=\black.
\pos{k}{11}=\black.
\pos{k}{12}=\white.
\pos{k}{13}=\black.
\pos{k}{14}=\black.
\pos{k}{15}=\black.
\pos{k}{16}=\white.
\pos{k}{17}=\white{27}
\pos{k}{18}=\black{30}
%
%
\pos{l}{4}=\white{11}
\pos{l}{5}=\white{65}
\pos{l}{6}=\black{66}
\pos{l}{9}=\black.
\pos{l}{11}=\black.
\pos{l}{12}=\black.
\pos{l}{13}=\black.
\pos{l}{14}=\white.
\pos{l}{15}=\white.
\pos{l}{16}=\black{26}
\pos{l}{17}=\white{31}
\pos{l}{18}=\white{39}
%
\pos{m}{1}=\white{53}
\pos{m}{3}=\white.
\pos{m}{4}=\black.
\pos{m}{5}=\black{12}
\pos{m}{8}=\black{36}
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
\pos{m}{14}=\white{14}
\pos{m}{15}=\black{28}
%
\pos{n}{1}=\black{52}
\pos{n}{2}=\white{47}
\pos{n}{3}=\white.
\pos{n}{7}=\black.
\pos{n}{8}=\white{35}
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{1}=\black{54}
\pos{o}{2}=\black{46}
\pos{o}{3}=\white.
\pos{o}{4}=\black.
\pos{o}{5}=\black.
\pos{o}{6}=\black{62}
\pos{o}{7}=\white{61}
\pos{o}{8}=\white.
\pos{o}{10}=\black.
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{3}=\black.
\pos{p}{4}=\black.
\pos{p}{5}=\white.
\pos{p}{6}=\black.
\pos{p}{7}=\black.
\pos{p}{8}=\white.
\pos{p}{9}=\white.
\pos{p}{10}=\white.
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{1}=\black{50}
\pos{q}{2}=\black{44}
\pos{q}{3}=\black.
\pos{q}{4}=\white.
\pos{q}{5}=\white.
\pos{q}{6}=\white.
\pos{q}{7}=\white.
\pos{q}{8}=\black.
\pos{q}{9}=\black.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{1}=\black{48}
\pos{r}{2}=\white{45}
\pos{r}{3}=\white{25}
\pos{r}{5}=\white.
\pos{r}{6}=\black.
\pos{r}{7}=\white.
\pos{r}{8}=\white.
\pos{r}{9}=\black.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\white.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{1}=\white{49}
\pos{s}{2}=\white{51}
\pos{s}{4}=\white.
\pos{s}{8}=\white.
\pos{s}{9}=\white.
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{15}
$$
\showfulldiagram
$$
\begin{center} $\textblack{4}= \textblack{\triangle}  {\hskip .5cm}  \textblack{6} = \textwhite{1}$ \end{center}
\begin{center}   Fig. 4 Move 173 to 239\end{center}
\end{figure}
\inifulldiagram
White \textwhite{3} and \textwhite{5} are necessary in order to reduce
the central black territory. Black \textblack{12} is not urgent, if
this move is played at position A to keep the central territory, black
already wins.

Black \textblack{30} is a good endgame move, white has to retreat
here. Black \textblack{56} is the final cause of loss. If this move is
played as in Dia.~14, black gets 3 points by sente, then black can win
1 point.

White \textwhite{67} is a good move and gets the last 3-point yose.

The original record ends at \textwhite{67}. White is leading by 3
points on the board, as white has to return one stone komi (2 points),
so finally, white wins by 1 point.

%
\pos{a}{2}=\white.
\pos{a}{8}=\black.
\pos{a}{16}=\black.
\pos{a}{17}=\black.
\pos{a}{18}=\black.
%
\pos{b}{2}=\black.
\pos{b}{3}=\white.
\pos{b}{4}=\white.
\pos{b}{6}=\white.
\pos{b}{7}=\black.
\pos{b}{9}=\black.
\pos{b}{10}=\black.
\pos{b}{11}=\black.
\pos{b}{12}=\white.
\pos{b}{13}=\white.
\pos{b}{15}=\white.
\pos{b}{16}=\white.
\pos{b}{17}=\white.
\pos{b}{18}=\black.
%
\pos{c}{2}=\black.
\pos{c}{3}=\black.
\pos{c}{4}=\white.
\pos{c}{6}=\white.
\pos{c}{7}=\white.
\pos{c}{8}=\black.
\pos{c}{10}=\white.
\pos{c}{11}=\black.
\pos{c}{12}=\white.
\pos{c}{17}=\white.
\pos{c}{18}=\black.
%
\pos{d}{3}=\black.
\pos{d}{4}=\black.
\pos{d}{5}=\white.
\pos{d}{7}=\white.
\pos{d}{9}=\black.
\pos{d}{10}=\black.
\pos{d}{11}=\white.
\pos{d}{16}=\white.
\pos{d}{17}=\white.
\pos{d}{18}=\white.
\pos{d}{19}=\black.
%
\pos{e}{2}=\black.
\pos{e}{5}=\black.
\pos{e}{6}=\white.
\pos{e}{7}=\white.
\pos{e}{8}=\black.
\pos{e}{12}=\white.
\pos{e}{13}=\white.
\pos{e}{14}=\white.
\pos{e}{15}=\white.
\pos{e}{16}=\black{\triangle}
\pos{e}{17}=\white.
\pos{e}{18}=\black.
\pos{e}{19}=\black.
%
\pos{f}{2}=\black.
\pos{f}{3}=\white.
\pos{f}{4}=\white.
\pos{f}{5}=\black.
\pos{f}{7}=\white.
\pos{f}{8}=\black.
\pos{f}{10}=\white.
\pos{f}{11}=\white.
\pos{f}{12}=\black.
\pos{f}{13}=\black.
\pos{f}{14}=\black.
\pos{f}{15}=\black.
\pos{f}{16}=\white.
\pos{f}{17}=\black.
\pos{f}{19}=\white.
%
\pos{g}{1}=\black{1}
\pos{g}{2}=\white.
\pos{g}{3}=\black.
\pos{g}{4}=\black.
\pos{g}{6}=\black.
\pos{g}{10}=\white.
\pos{g}{11}=\black.
\pos{g}{12}=\white.
\pos{g}{13}=\white.
\pos{g}{14}=\white.
\pos{g}{15}=\white.
\pos{g}{16}=\black.
\pos{g}{17}=\black.
\pos{g}{18}=\black.
\pos{g}{19}=\black.
%
\pos{h}{2}=\white.
\pos{h}{3}=\white.
\pos{h}{4}=\black.
\pos{h}{5}=\black.
\pos{h}{8}=\white.
\pos{h}{10}=\white.
\pos{h}{11}=\black.
\pos{h}{12}=\black.
\pos{h}{13}=\white.
\pos{h}{15}=\white.
\pos{h}{16}=\white.
\pos{h}{17}=\white.
\pos{h}{18}=\white.
\pos{h}{19}=\black.
%
\pos{i}{2}=\white{2}
\pos{i}{3}=\black.
\pos{i}{4}=\white.
\pos{i}{5}=\black.
\pos{i}{7}=\black.
\pos{i}{11}=\black.
\pos{i}{12}=\white.
\pos{i}{13}=\black.
\pos{i}{14}=\white.
\pos{i}{15}=\white.
\pos{i}{18}=\black.
%
\pos{k}{3}=\white.
\pos{k}{4}=\white.
\pos{k}{5}=\black.
\pos{k}{10}=\black.
\pos{k}{11}=\black.
\pos{k}{12}=\white.
\pos{k}{13}=\black.
\pos{k}{14}=\black.
\pos{k}{15}=\black.
\pos{k}{16}=\white.
\pos{k}{17}=\white.
\pos{k}{18}=\black.
%
%
\pos{l}{2}=\white{4}
\pos{l}{4}=\white.
\pos{l}{9}=\black.
\pos{l}{11}=\black.
\pos{l}{12}=\black.
\pos{l}{13}=\black.
\pos{l}{14}=\white.
\pos{l}{15}=\white.
\pos{l}{16}=\black.
\pos{l}{17}=\white.
\pos{l}{18}=\white.
%
\pos{m}{1}=\white.
\pos{m}{3}=\white.
\pos{m}{4}=\black.
\pos{m}{5}=\black.
\pos{m}{8}=\black.
\pos{m}{9}=\black.
\pos{m}{10}=\black.
\pos{m}{11}=\black.
\pos{m}{12}=\white.
\pos{m}{13}=\white.
\pos{m}{14}=\white.
\pos{m}{15}=\black.
%
\pos{n}{1}=\black.
\pos{n}{2}=\white.
\pos{n}{3}=\white.
\pos{n}{4}=\black{3}
\pos{n}{7}=\black.
\pos{n}{8}=\white.
\pos{n}{12}=\black.
\pos{n}{13}=\white.
\pos{n}{14}=\white.
\pos{n}{15}=\white.
\pos{n}{16}=\white.
\pos{n}{17}=\white.
\pos{n}{18}=\white.
%
\pos{o}{1}=\black.
\pos{o}{2}=\black.
\pos{o}{3}=\white.
\pos{o}{4}=\black.
\pos{o}{5}=\black.
\pos{o}{8}=\white.
\pos{o}{10}=\black.
\pos{o}{12}=\black.
\pos{o}{13}=\black.
\pos{o}{14}=\white.
\pos{o}{15}=\black.
\pos{o}{16}=\black.
\pos{o}{17}=\black.
\pos{o}{18}=\black.
%
\pos{p}{3}=\black.
\pos{p}{4}=\black.
\pos{p}{5}=\white.
\pos{p}{6}=\black.
\pos{p}{7}=\black.
\pos{p}{8}=\white.
\pos{p}{9}=\white.
\pos{p}{10}=\white.
\pos{p}{11}=\black.
\pos{p}{12}=\black.
\pos{p}{13}=\white.
\pos{p}{14}=\black.
\pos{p}{15}=\black.
\pos{p}{16}=\white.
\pos{p}{17}=\white.
\pos{p}{18}=\black.
%
\pos{q}{1}=\black.
\pos{q}{2}=\black.
\pos{q}{3}=\black.
\pos{q}{4}=\white.
\pos{q}{5}=\white.
\pos{q}{6}=\white.
\pos{q}{7}=\white.
\pos{q}{8}=\black.
\pos{q}{9}=\black.
\pos{q}{12}=\white.
\pos{q}{13}=\white.
\pos{q}{14}=\black.
\pos{q}{15}=\white.
\pos{q}{16}=\black.
\pos{q}{18}=\black.
%
\pos{r}{1}=\black.
\pos{r}{2}=\white.
\pos{r}{3}=\white.
\pos{r}{5}=\white.
\pos{r}{6}=\black.
\pos{r}{7}=\white.
\pos{r}{8}=\white.
\pos{r}{9}=\black.
\pos{r}{11}=\white.
\pos{r}{12}=\white.
\pos{r}{13}=\black.
\pos{r}{14}=\white.
\pos{r}{15}=\white.
\pos{r}{16}=\black.
%
\pos{s}{1}=\white.
\pos{s}{2}=\white.
\pos{s}{4}=\white.
\pos{s}{8}=\white.
\pos{s}{9}=\white.
\pos{s}{13}=\white.
\pos{s}{14}=\black.
\pos{s}{15}=\black.
\pos{s}{16}=\black.

\begin{figure}[htbp]
\gofontsize{10}
$$
\showdiagram a-t:1-8
$$
\begin{center}   Dia.~14 \end{center}
\end{figure}
\inifulldiagram

\vskip 1cm
\begin{center}
    {\bf 239 Moves In Total {\hskip 1cm}   White Wins By 1 Point}
\end{center}

\subsection*{[Translator's Notes]}


\indent
The translator is not responsible for distribution and any copyright
problem. The copyright of this article, if there is any, will belong
to the author and/or the Chinese Go World magazine.

The translator acknowledges having used Miss Hanna Ko{\l}odziejska (of
Poland)'s \LaTeX\ typesetting program and thanks her for providing such a
wonderful program!

Mr. Jan van der Steen (3 dan) of Holland helps the translator a lot
with the \LaTeX\ typesetting which makes this translation possible. The
translator would like to take the opportunity to thank Jan for his
kindness, encouragement and whole-hearted help.
%
% Thank you Xuegen
%

\end{document}
