2-Player Graphical Chess Program
Author: Ryan Lilien




Chess for the TI-85
 
This game was created for entertainment purposes about a month ago.
Many bugs were worked out, yet please leave mail concerning any
problems you may have.  You must play against another person,
because to implement a chess algoritm on the 85 is pushing it.
 
The Group of files is about 9.5K.
 
Instructions:
 
     CHES2 is the start program.  If the program is in ASCII form it
will take some time to 'compile' it.  The program name is displayed,
press enter.  You are now viewing the board.  On the right is the 
area for taken pieces.  Pawns are marked with lines next to the 
proper pawn, while other pieces are drawn on the side as they are 
taken.  To play aturn you must understand to coordinates of the 
board.  They are:
 
     8 - - - - - - - -
     7 - - - - - - - -    Press enter to enter a move, the player's
     6 - - - - - - - -    turn is displayed, with a FX? prompt, this         
 Y   5 - - - - - - - -    is the First X move, type 4 (enter), now
     4 - - - - - - - -    the First Y, type 2 (enter), now the Second
     3 - - - - - - - -    X move, type 4 (enter), finally the Second Y
     2 - - - - - - - -    move, type 3 (enter).  This will move the
     1 - - - - - - - -    pawn at (4,2) to (4,3).  Very simple.
       1 2 3 4 5 6 7 8
                 
              X
 
The calculator makes sure the move is legal then advances the pawn one
space.  Press enter to make the Black move.  If you forgot your move 
or just wish to see the board again type 0 as the First X move.  If you
wanted to move (3,1) to (5,3) but typed FX?3 FY?4 on accident just 
finish entering your move, but make it an illegal move so that you can 
reenter your turn.  
 
If you enter 99 as the First X, you get a list of options.  Save, 
Load, TakeB, Castle, and Quit.
 
SAVE / LOAD
     The program will allow you to save one game using approx 1.5K 
(this is because it saves the display as a PIC, and the board setup 
as a MATRIX)  In order to make it easier to save, the program will
only allow you to save when it is White's turn, so that it has less 
to remember.  To save, simply press F1 and wait for the Saved display 
to appear, press enter and continue play, or exit the program.  To 
load, do the same.
 
TAKEBACK
     The take back procedure is slightly strange, pressing F3 will 
allow you to enter 'another' move.  Example, if you moved (4,2) to 
(4,3) as above and you wished to take it back, press F3 at the menu.  
Then type FX?4 FY?3 SX?4 SY?2.  The final prompt is PF, this is the 
number of the piece that was in square (FX,FY) before you moved there 
and captured it,  the piece numbers are the following:
 
             White   Black
     Pawn    1       11         NOTE: If there was no piece in (FX,FY)
     Rook    2       12               then enter 0 for PF.
     Knight  3       13
     Bishop  4       14
     Queen   5       15
     King    6       16
 
     Takeback does not check the legality of the move so it can be 
used to put extra pieces on the board, for example to place a Black 
Queen in (5,6) takeback from (5,6) to (2,3) <- or anywhere, with PF 
equal to 15.  WOW!
 
CASTLE
     When castle is selected the options are given as to a Black 
Kingside, Black Queenside, etc... Quit will take you back to the menu
 
QUIT
     When Quit is selected you get the option of GAME or EXIT.  GAME 
returns you to the enter move screen, while EXIT drops you out of the 
program.
 
Please leave any questions or comments to AR799@slc4.ins.CWRU.Edu
Hope you enjoy it,
Ryan Lilien