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The Very Best of Atari Inside
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The Very Best of Atari Inside 1.iso
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ch.txt
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1992-03-30
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Chess
---------------------------------------
This program plays a weak (almost
suicidal!) game of chess, but has a
reasonable user interface. It is
intended to take the place of a hand
held chess set for game analysis.
When it is started it offers the menu:
Orig Init 2..9 End:
Original chooses the standard starting
position.
Initialise allows you to set up a
position from an empty board.
Digits 2..9 choose one of 8 built in
endgames (E, white to win) or mates
in 2 or 3 :-
2 3 4 5 6 7 8 9
E E E 3 3 E 2 2
End quits.
Once you have chosen or initialised
(see below) a starting position, it
offers a menu to choose who plays
the white pieces.
White - Org Inorg End:
Organic means you play.
Inorganic means the computer plays.
End reverts to the main menu.
The menu is repeated for black.
Moves are then entered in algebraic
notation. For pawn moves only the
destination square is entered (eg e4),
even if there is a capture
(including en passant). Pieces
must be named (K/Q/R/N for a knight,
or L for a bishop (German
'Laufer' (?))). For example qh5.
If the source square is ambiguous,
it is prompted for with a '<'. If the
move is a pawn promotion, the piece is
prompted for with a '>' (As there are
4 valid moves for a promotion, the
source square will have been prompted
for). Castling is done by entering the
special king double step (eg Kg1).
The program plays a legal game of chess
with two exceptions. Stalemate is
counted as a win, and a draw by 3-fold
repetion of position will not be
recognised.
A game may be interrupted at your turn
by pressing <esc>. A menu is shown:
Resn Mvback Un/Save Cont:
Resign returns to the main menu.
Move-back reverses the previous move.
(if it was a computer move, the
computer will play again).
Save stacks the position (the stack
holds 4 positions)
Unsave unstacks a previously stacked
position, including game information.
Save and Unsave allow you to play
through bracketed variations, and then
return to the game.
Continue cancels the <esc>
Some information is shown at the left
hand side. The first line shows the
stack number of the board (0..3). The
second line shows the ply (half-move)
number. The third line shows the number
of moves since a pawn was moved, or a
piece captured. The fourth line shows
the valid castling flags (there are
other checks for legal castling as
well). The fifth line shows the last
e.p. square for a pawn. The seventh
and eighth lines show the number of
moves listed for white or black. At the
bottom right are shown the listed/valid
moves for white and black.
Initialisation
--------------
If this option is chosen at the main
menu, an empty board is displayed and
the program waits for pieces and their
positions to be entered, in the same
format as game moves. For example a
simple mate in one would be:-
kg6 kg8 rh4 <esc>
(The spaces are not typed). The only
restriction is that pawns will not be
allowed on the 1st or 8th ranks. When
the <esc> is pressed, a menu is shown:
Done More Place Clear:
Done means initialisation is finished.
More cancels the <esc>.
Clear prompts for a square (eg e4) to
be cleared.
Place enables input of a position in
puzzle (?) notation. Another menu
shows:
pieces 1..7 <cr> <esc>
A piece name (in upper or lower case)
will then be entered at the cursor, and
the cursor advanced. (Enter 'P' or 'p'
for a pawn here). Digits 1 to 7 will
move the cursor to the right, and <cr>
move it to the first column on the next
row (then back to the top after the
bottom row). The example above would be
1 k <cr> <cr> 1 K <cr> <cr> 7 R <esc>
(The spaces are not typed). The <esc>
returns to the Done/More/Place/Clear
menu.
Future enhancements to the program will
include:-
1. Stronger playing!
2. Recognition of stalemate.
3. Recognition of 3-fold repetition.
4. Double move-back.
5. Arrow keys enabled at 'Place' input.
Hugh Satow
---------------------------------------
hugh@bilpin.co.uk