Search found 18579 matches

by hgm
Sat Oct 13, 2007 12:42 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Perft Stats
Replies: 4
Views: 1887

Re: Perft Stats

Indeed. I tested my perft initially against your results. I could confirm all the numbers you used to quote on you website (when it was still up). Except for the checks, which my perft doesn't count.
by hgm
Sat Oct 13, 2007 12:20 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Hashing and mate scores
Replies: 47
Views: 17855

Re: Hashing and mate scores

I think that best way for testing hash tables is testing with KRK endgames. Lot of engines can not find shortest mate in analyze mode. It seems that uMax have problem to find shortest mate.... Yes, you are right. But that is not because of the mentioned mechanism (which I included mainly not for fi...
by hgm
Sat Oct 13, 2007 11:39 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Deep Blue rehash and a possible Deep Go
Replies: 10
Views: 4865

Re: Deep Blue rehash and a possible Deep Go

The really funny funny thing is that GO initally looks so simple to code. I had seen some early attempts of GO code and was supprised what little it took. Unlike chess where there are 6 different pieces that all move in different directions with different rules attached, all GO pieces are the same ...
by hgm
Sat Oct 13, 2007 11:32 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: What is the best known speed of move generation?
Replies: 109
Views: 48864

Re: What is the best known speed of move generation?

Almost none (with material + piece-square table differential eval only). But you count nodes differently, of course. The perft(6) (without Make/UnMake) you would count as a 5-ply search, with 486k nodes. The 6th ply would merely be concluding that none of the generated moves is worth searching (i.e....
by hgm
Sat Oct 13, 2007 9:27 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: What is the best known speed of move generation?
Replies: 109
Views: 48864

Re: What is the best known speed of move generation?

Wow! Perft 8 in under 2 minutes. Perhaps I should stress that this is (mostly) without making / unmaking the last ply, just generating moves and then lookig at the move-stack pointer to see how many there are. (That is what I mean by 'bulk counting'.) Only King moves and e.p. captures are actually ...
by hgm
Sat Oct 13, 2007 8:40 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Perft Stats
Replies: 4
Views: 1887

Re: Perft Stats

Note that I still have an older perft code on my website that does give a break-down by move characteristic. (No checks, though. :( ) Unfortunately it is not able to read the initial position from a FEN, but has to have it hard-coded in the source, which makes it a bit cumbersome to use. $ ./perft11...
by hgm
Fri Oct 12, 2007 9:44 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: What is the best known speed of move generation?
Replies: 109
Views: 48864

Re: What is the best known speed of move generation?

On my c2d@2.4GHz, crafty (I've downloaded the most recent 64-bit binary for linux) gives ~19M nodes per second. White(1): perft 6 total moves=119060324 time= 6.29 White(1): perft 7 total moves=3195901860 time=167.37 (can't measure for 8 plies, there seem to be an overflow) With my o...
by hgm
Thu Oct 11, 2007 10:09 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Would someone be interested in programming....
Replies: 43
Views: 17112

Re: Would someone be interested in programming....

Wow! I have a user-selectable board size now, through command-line options /boardWidth and /boardHeight. 8-)
by hgm
Thu Oct 11, 2007 8:03 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Would someone be interested in programming....
Replies: 43
Views: 17112

Re: Would someone be interested in programming....

I guess so. I did not change anything in the basic mechanism for accessing and interpreting the fonts; it is still as Allessandro Scotti made it. I just expanded the number of piece types Winboard can support. In the native bitmap mode of Winboard the Queen-side alternatives for Rook, Knight and Bis...
by hgm
Wed Oct 10, 2007 9:56 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Would someone be interested in programming....
Replies: 43
Views: 17112

Re: Would someone be interested in programming....

OK, I modified Winboard to allow display of more different piece types, and it seems to work!

Now all I need is a good font.