Search found 146 matches

by Patrice Duhamel
Sat Jul 13, 2013 6:46 pm
Forum: Computer Chess Club: General Topics
Topic: Cheese 1.5
Replies: 6
Views: 1311

Re: Cheese 1.5

Tournaments are always encouraging.

Thank you.
by Patrice Duhamel
Sat Jul 06, 2013 5:10 pm
Forum: Computer Chess Club: General Topics
Topic: Cheese 1.5
Replies: 6
Views: 1311

Re: Cheese 1.5

velmarin wrote: I wanted to say,
you seem to have a good base to work.
A very good base for improvement. Bitboard, speed, ect ..
No critical sovereign actual, Excuseme.
It is what I understood reading your previous message, no problem. :)

Thank you.
by Patrice Duhamel
Sat Jul 06, 2013 4:30 pm
Forum: Computer Chess Club: General Topics
Topic: Cheese 1.5
Replies: 6
Views: 1311

Re: Cheese 1.5

velmarin wrote: I really like your page, and the engine, and I believe you have a lot to improve.
Thanks,

Yes I have lots of things to improve and bugs to fix,
the main problem is to find time and motivation. :)
by Patrice Duhamel
Sat Jul 06, 2013 8:59 am
Forum: Computer Chess Club: General Topics
Topic: Cheese 1.5
Replies: 6
Views: 1311

Cheese 1.5

Hello, Cheese 1.5 is available : http://cheesechess.free.fr/en/download.html I changed the names of executables, now "pop" at the end of the file name means this is the version using hardware popcount (the fastest). Changes : - add staged move generation - fix problems in move validation - fix probl...
by Patrice Duhamel
Fri Jun 21, 2013 10:16 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: First post (and FailHigh question!)
Replies: 89
Views: 18837

Re: First post (and FailHigh question!)

You did mentioned earlier that your program has an old bug about wrong mate scores that you could not resolve - so you disabled mate score adjustment. You cannot do a half-measured hashing of mate scores. I suggest as a temporary measure, you do not store any +/- mate scores in your TT; so you also...
by Patrice Duhamel
Fri Jun 21, 2013 4:57 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: First post (and FailHigh question!)
Replies: 89
Views: 18837

Re: First post (and FailHigh question!)

Hello, Don't know if it helps, but for me one part of the problem with wrong mate scores was in null moves pruning. In my condition to prevent zugzwang positions, I used the total number of non pawn pieces instead of the value for the current player. Now there are other variations with mate scores i...
by Patrice Duhamel
Wed Jun 19, 2013 6:48 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: First post (and FailHigh question!)
Replies: 89
Views: 18837

Re: First post (and FailHigh question!)

Do you mean without hash probing in QS? Yes, I don't use the hashtable in quiescence search. And for your problem, do you have a different result if you enable or disable mate score adjustment ? Another thing: have you implemented perft? Yes... Of course you did... Well, did you implemented perft w...
by Patrice Duhamel
Tue Jun 18, 2013 9:42 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: First post (and FailHigh question!)
Replies: 89
Views: 18837

Re: First post (and FailHigh question!)

What's active in this search? Q-search? IID? LMR? Have you debugged your search ONLY? e.g. post output when not using advanced tricks and means. Only plain search (and no QS). The less things active, the lesser the headache... My search is a fail hard alpha beta with pvs, quiescence search without ...
by Patrice Duhamel
Tue Jun 18, 2013 8:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: First post (and FailHigh question!)
Replies: 89
Views: 18837

Re: First post (and FailHigh question!)

With the position you give at the begining of your post : FEN: 8/8/3K4/8/8/3N4/8/3B3k w - - 0 1 (I give only the first move in pv, for readability) Note that it should play Ke5, I found the move in the previous version of my engine, I think it's another problem. Without mate score adjustment : 27/39...
by Patrice Duhamel
Tue Jun 18, 2013 4:43 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: First post (and FailHigh question!)
Replies: 89
Views: 18837

Re: First post (and FailHigh question!)

I have wrong mate scores in some end game positions, I don't know if it's the same problem. I know it's wrong, but I disabled mate score adjustment until I found the problem, because only when I'm using it I have this problem of wrong mate scores. It's an old problem and I still not found a solution...