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1989-02-17
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TETRIS How To Play
Randomly shaped pieces drop from the top of the screen. Your job is
to arrange them as they fall so that you can drop the greatest number of
pieces into the available volume. You maneuver the pieces by rotating them
and moving them horizontally. If you have arranged the pieces so that a solid
row of squares is formed horizontally, that row will be eliminated, giving you
some breathing room.
Your score is a function of three factors: the current level, how
quickly you place the pieces, and whether you are peeking at the next piece.
You choose your starting level at the beginning of the game. After
that, your level increases every time you eliminate 10 rows, except that if,
for example, you start at level 3, you will stay at that level until you have
eliminated 30 rows.
You can improve your score by instantaneously dropping pieces as soon
as you have them properly aligned.
If you are peeking at the next piece, your award for getting a piece down
will be decreased by about one-third. You may find this is worth the price.
About The Game
I claim no credit for inventing the game TETRIS; that was apparently
done by A. Pajitnov and V. Gerasimov in the Soviet Union. I did write this
implementation from scratch in Turbo Pascal Version 4.0. I did it mainly for
the hell of it, but I improved on the original where I thought it needed it.
The two main improvements are the ability to run on monochrome screens
(although it looks better in color) and a more responsive feel. I also used
the movement keys that are used in the commercial version of the game,
although I personally prefer the original movement keys. (In fact, you can
use the original movement keys as well; i.e., to move left, 7 or J; to rotate,
8 or K; to move right, 9 or L; to peek ahead, 1 or M; to drop, 4 or Space
Bar.) Finally, my version should work at the same speed no matter how fast
your processor is; I have heard that that is a problem with the commercial
version.
My program is freeware, subject only to the restriction that it is not
to be sold commercially. I would, however, appreciate comments, bug reports,
and suggested improvements for future versions. My CompuServe ID is
71600,521.
David Howorth