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cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

pspChess is a port Boo's Ches Engine to the PSP.

Binary: http://www.cse.msu.edu/~bowronch/pspchess.zip
Screenshot: http://bace.bowron.us/screenshot.png
Source: http://www.cse.msu.edu/~bowronch/pspchess_src.zip

It has an opening book of 800 lines, then will switch over to a search based strategy. You can change the searchdepth via the option menu.

Move selection is done by arrow keys and x. Pressing start and select will change the search depth, Left trigger will back up a move, Right trigger will make the computer play the side who's turn it is.

The source to the original text based BCE is available here:
http://www.bowron.us/FILES/bce.tar.gz for reference.

cyod · Joined: 29 Apr 2005 Posts: 36

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

I've worked on it, and gotten the basics of a computer opponent working, still only tested under pspe. As the computer is thinking through its moves it will display the board configuration of the move it is considering...

from readme.txt:

select piece to move using arrows and then press x. Select destination square using arrows then press x.

START decrease searchdepth
SELECT increase searchdepth
RTRIGGER make computer move
LTRIGGER back up a move

known errors:
seeing some illegal and weird moves being made. Set searchdepth to 3, on black's 5th move or so the move will actually move white rook from A1 to C5.

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

I added an opening book of 800 different openings...

A computer opppoenent will follow a book opening as long as one exists, then switch over to a search based move.

I have still not tested this on a real psp. If you have please let me know how it works, and if it does work, what kind of search depth can be used?

Thanks

skippy911 · Joined: 06 May 2005 Posts: 46

Seems to be stuck in an endless loop on my 1.0 psp and wont let me move anything.

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

skippy911 · Joined: 06 May 2005 Posts: 46

Loaded about 80 books.

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

Release version 0.03

Made book loading optional (press square button).
Added more debug display information during search.
Added move sorting before search.
Board flips over when its blacks turn to move.

Guest · Posted: Mon May 23, 2005 4:50 am Post subject:

We got software discussion topic now, so throwing it there...

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.04

Changes:

display clocks (clocks only change when a move is made)

display alpha and beta in search display

change sceCtlRead functions to use 1 as second parameter (that's what skippy's library functions use)

removed splash screen

added killers display during search

emumaniac · Joined: 08 May 2005 Posts: 79

thanks for the release, shouldnt it be 0.04 release ;)

a mirror page of your release ahs been made here http://psp-news.dcemu.co.uk/pspchess.shtml

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

please note that I have changed the file location to:

http://bace.bowron.us/pspchess.zip

RELEASE 0.05

Added GPL license information

Added more status information to display

changed some keys (see readme for current setup)

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.06

print out best line during search

switched to elf2pbp which will now use the correct icon during build

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.07

g_show_thinking variable (controls whether the computer shows the
moves it is considering. toggle with SQUARE+RTRIGGER) default: off

removed get_time function, reinstated get_ms function, and changed
everything to that. get_ms at this point has only 1 second precision
but is multiplied by 1000 to make it milliseconds

display status information when clearing hashes (because it takes a while)

move stdlib implementations into own file (lib.c)
- fixed type mismatch between my versions and standard

emumaniac · Joined: 08 May 2005 Posts: 79

awesome release mirror page updated too http://psp-news.dcemu.co.uk/pspchess.shtml

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.08

new images - thanks to Stadi Thompson

changed key processing code

Screenshot:

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.09

pgFancyPrint - cooler looking fonts [See above picture for screenshot]

display transposition table hit info during search

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

I had some feedback from a user using it on a real psp. Hopefully this will fix some of the issues. If anyone else has uncovered bugs on a real psp or on pspe please post them here.

RELEASE 0.10

bitmap handling code changes

changed key press code to use skippy's Read_Key()

inserted code to handle home button press.

change message about clearing hash tables and switching to search mode

emumaniac · Joined: 08 May 2005 Posts: 79

great release mirror page updated at http://psp-news.dcemu.co.uk/pspchess.shtml

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.11

add in check message

board flipping option (when enabled the board flips when its blacks move)

start key = reset game (with confirmation)

fixed home button (has been confirmed on 1.0 psp)

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.12

debug info option

option menu (SELECT)

began adding pondering (psp thinks on your time) (not working yet)

added mswap exploit file creation to create_eboot
(MS1/EBOOT.PBP, MS2/EBOOT.PBP)

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.13

moved everything to makefile

PIC1.PNG

background image (can be turned off)

default setup : WHITE: human, BLACK: psp

display options - you can turn of the options display on main screen

extra keys option - you can turn off some of the key processing

background image for option menu - thanks to Stadi Thompson

wulf · Joined: 13 Apr 2005 Posts: 81

I have a question for you!

Do you use the psp-dev environment or the "ee-gcc -march=r4000 etc" environment for your chess game?

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

wulf · Joined: 13 Apr 2005 Posts: 81

cool, I'll take a look!

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.14

display "Thinking" when thinking of a move

increased default searchdepth to 5

test about moving into check

compile flag changes (removed -g added -O3) - big speed improvements
under pspe - don't know for sure about real psp

switched to pspdev kit with gcc 4.0.0

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

From now on I will be distributing the binaries and the source separately.

Binaries now include a kxploit version as well as the normal EBOOT.PBP for 1.0 psps.

From the changelog:

RELEASE 0.15

split distribution into pspchess.zip (binaries only) and
pspchess_src.zip (with full source)

switched to correct usage of psp-gcc

added KXploit files to makefile and zip

decreased default searchdepth to 4

save/load game - saves to \PSP\GAME\CHESS.SAV - very simplistic

cwbowron · Joined: 06 May 2005 Posts: 76 Location: East Lansing, MI

RELEASE 0.16

fixed bug in save game

darken board when thinking...

automatically load book

switched to pspsdk beta 1.0

end game tests (draw by rep, draw by no material, checkmate, stalemate)