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- Newsgroups: rec.games.abstract
- Path: sparky!uunet!cs.utexas.edu!torn!watserv2.uwaterloo.ca!watmath!watcgl!eadengle
- From: eadengle@watcgl.uwaterloo.ca (Ed "Cynwrig" Dengler)
- Subject: Re: defects in abstract games
- Message-ID: <Bzq36C.43r@watcgl.uwaterloo.ca>
- Organization: University of Waterloo
- References: <BzMrHE.At3@watcgl.uwaterloo.ca> <1992Dec22.143005.11060@ll.mit.edu> <kleber.725061503@husc.harvard.edu>
- Date: Wed, 23 Dec 1992 17:27:47 GMT
- Lines: 155
-
- In article <kleber.725061503@husc.harvard.edu> kleber@husc11.harvard.edu (Gwydden) writes:
- >
- >Ed Dengler proposes Hnefatafl (sp?) (that's NEF-tof-ul, sort of) as an
- >abstract game with no flaws, and Nate Smith asks for details on what
- >it is.
- >
-
- Well, the pronunciation (as far as I can find out, not being an Old English
- expert) is NUF-A-TAF-UL (ie. the A is proncounced).
-
- >In reverse order: Hnefatafl is a Viking board game; don't remember what
- >century, but old. There are two players, one attacking, one "defending",
- >or more accurately trying to escape. Players start with lots of
- >pieces in a specific arrangement on a large square board-- sizes and
- >placement of pieces vary; in the 23x23ish range; with the defending pieces
- >mostly towards the center of the board (but a few on the outsides), and
- >the attacking pieces genearlly surrounding them.
- >
-
- Actually, while a Viking board has been found, the only rules to date are
- from a Saxon manuscript (this is also where the name is found).
-
- The original manuscript used an 18x18 board which the pieces were placed
- on the points (thus, it can easily be played on a GO board). The layout
- looks as follows (. is an empty point, K is the king, k are the king's
- men, and o are the attackers):
-
- . . o . . o . . . . . . . o . . o . .
- . . . . . . . . . . . . . . . . . . .
- o . . . . o . . . . . . . o . . . . o
- . . . . . . . o . o . o . . . . . . .
- . . . . . . o . k . k . o . . . . . .
- o . o . . o . . . . . . . o . . o . o
- . . . . o . . . . k . . . . o . . . .
- . . . o . . . . k . k . . . . o . . .
- . . . . k . . k . k . k . . k . . . .
- . . . o . . k . k K k . k . . o . . .
- . . . . k . . k . k . k . . k . . . .
- . . . o . . . . k . k . . . . o . . .
- . . . . o . . . . k . . . . o . . . .
- o . o . . o . . . . . . . o . . o . o
- . . . . . . o . k . k . o . . . . . .
- . . . . . . . o . o . o . . . . . . .
- o . . . . o . . . . . . . o . . . . o
- . . . . . . . . . . . . . . . . . . .
- . . o . . o . . . . . . . o . . o . .
-
- >Players alternate moving a piece; all pieces move like chess rooks.
- >Captue is by placing two pieces of yours on either side of a single
- >enemy piece, all in one line (XOX captures the O). The one special
- >piece is the "defender" king, which starts in the center, and must be
- >surrounded on all four sides to capture-- with certain exceptions.
- >See below, on why I don't think this is a perfect game.
- >
-
- This capture (the XOX) is known as a courier capture. The reason I consider
- the capturing rules consistent stem from the fact that I belong to the
- Society of Creative Anachronism, and I am an authorized fighter in the
- society. In a "real" fight (or as real as Society fighting can get), if
- you get into a position where one fighter has engaged you (and you are
- thus facing him and fighting, giving rise to the position XO.), and another
- fighter comes up behind you (giving rise to the position of XOX), then you
- are in 99% of the cases dead meat (the fighter coming up behind you can easily
- foul your weapon, thus allowing the front man an easy shot at you). This
- explains why the courier capture kills the centre man easily. If the extra
- fighter came orthogonally to the first one (giving rise to a position such as
- .
- XO.
- X
-
- then in "real" fighting the O fighter can usually survive (I will admit that
- this usually requires the O person to be super defensive, but it can be done
- since I have done this on battlefields).
-
- If however, there are two fighters in front of you (such as X.X), you can
- usually split them by going between them. Since you know that you are
- going into this postion, you can usually stave off their attacks even if
- both of them try to kill you. This is why Hnefatafl does not consider a
- piece moving voluntarily into a courier capture position to be captured.
-
- The exception to this is that extremely good fighters can easily turn around
- and engage the man who came up from behind, and not die. Since kings are
- supposed to be excellent fighters, this requires that you completely
- surround him so that at least one of the fighters has a shot at fouling his
- weapon from behind.
-
- Now, about the throne. This is the only obstacle on the entire board.
- In many "real" fights, the winner is the one who usually goes offensive
- (you can't kill somebody if you never swing your sword), so the concept
- is that if you are blocked on one side, and are engaged by a fighter
- coming from the other side, then you can be quickly killed since you
- have no room to retreat. This is why an empty throne is considered to be
- the opposite man in an attack.
-
- Also, being the special symbolism of the king, no piece would want to
- place themselves on the throne. A more practical reason is that unless
- you are a very good fighter, putting youself at a disadvantage of having to
- negotiate furniture in the space you are fighting in usually means that
- you will trip and fall, thus an easy mark for your opponents (try fighting
- out in some woods and see how awkward fighting around a tree is). This is
- the reason (IMO, since I do not know what they would be thinking when they
- came up with the game) that only the king is allowed on the throne, since
- he is the only "excellent" fighter of all the pieces, and can thus not
- suffer the penalty of fighting around a throne.
-
- >The goal of the attackers os, of course, to get the king; the goal of the
- >defender is to get his king to an edge of the board.
- >
- >Now, why I don't think this is an unblemished game. First, it has a
- >nontrivial starting position, though I can get over that one. Second,
- >the rules exceptions I mentioned above: (1) no "attacker" piece can
- >ever land *on* the center square where the King starts (I've never
- >understood the reason for this rule); (2) as a result, the King could
- >stand adjacent to this square and be immune from capture, so if he's
- >adjacent to that square, you only need to surround him on three sides;
- >(3) similarly, if the king is adjacent to one of his own men, you
- >can surround the pair of them (with six guys) and win. This rule
- >really needs to be generalized, in something like a go-type way.
- >
-
- For case (1), no piece except the king may occupy the throne (this goes for
- attackers and defenders alike). For case (2), since the throne is an
- obstacle, and thus counts as the opposite man on the attack, the king can
- be captured by three attackers and the throne. For case (3), this is not
- a capture of the king, since the king is NOT surrounded by four attackers.
- The attacking player would have to kill of the extra man, and then capture
- the king.
-
- >Nope, this one has too many impurities for me. I second the nomination
- >of Go for the most perfect abstract game, with "mental jujitsu"
- >(the perfect-knowledge bidding card game) pretty high up there too.
- >
- >--Michael Kleber I don't have an overactive imagination...
- > kleber@husc.harvard.edu I have an underactive reality... --EG
-
- I hope I have explained to you why I do not consider the points you have
- made to be impurities. After doing fighting in armour, and in some instances
- with obstacles in the way (such as fighting in woods and on bridges), I
- consider Hnefatafl to be a very accurate simulation of real fighting given
- the simple rules it has.
-
- (Source for these rules: A History of Board Games (Other Than Chess) by
- H.J.R. Murray)
-
- Ed
-
- P.S. There are more variants for this game, unfortunately, I am soon
- leaving for Christmas vacation. I will do a post of all the
- variants I know about with sources when I come back in the new
- year. Merry Christmas to everyone!
-
- P.P.S. As I will not be around for about a week, and this university kills
- posts in this newsgroup within a day :-(, if anybody has a response
- to this, could they e-mail me a copy so I don't miss anything?
-
-