Search found 110 matches

by tvrzsky
Thu Sep 13, 2007 12:43 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: discovered check definition
Replies: 20
Views: 6335

Re: discovered check definition

The SMIRF website did not give discovered checks, did it? I thought it gave just checks, double checks and checkmates. I would not count castling checks, although there is one case where a castling check has the character of a discovered check, where you check with the Rook and attack something tha...
by tvrzsky
Thu Sep 13, 2007 12:25 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Nondeterministic Testing in Weak engines such as Eden 0.0.13
Replies: 23
Views: 7776

Re: Nondeterministic Testing in Weak engines such as Eden 0.

Mr. Hyatt, what do you think about FIXED TIME PER MOVE condition? I use it by now for several reasons, mostly because my engine has not any time management yet :lol: . Seriously, I am simply not interested in this one since at the present stage I care solely about search and evaluation improvements ...
by tvrzsky
Tue Sep 04, 2007 1:00 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Seeking perfts from root position
Replies: 25
Views: 9835

Re: Seeking perfts from root position

perft(7): SubtreePerft SubtreeInnerNodes ---------------------------------------------------------------------------------- 01/20 Nb1-a3 120,142,144 5,064,713 1.63 s 3108.47 kN/s 02/20 Nb1-c3 148,527,161 5,952,936 3.51 s 3165.10 kN/s 03/20 Ng1-f3 147,678,554 5,967,223 5.39 s 3176.11 kN/s 04...
by tvrzsky
Tue Aug 28, 2007 9:48 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: hyperbola-quintessence
Replies: 12
Views: 5816

Re: hyperbola-quintessence

Yes, I definitely vote for this one. It looks like stolen from my header file ...
Filip
by tvrzsky
Tue Aug 28, 2007 12:23 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: hyperbola-quintessence
Replies: 12
Views: 5816

Re: hyperbola-quintessence

P.S. I remember reading the Hyperbola website a while back, maybee about some seven(?) years ago. I was starting with C and chess programming then and toying with some basic bit fiddling and assembler. I was taken with the idea but reversing bitboards or updating them during the make/unmake_move app...
by tvrzsky
Mon Aug 27, 2007 11:25 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: hyperbola-quintessence
Replies: 12
Views: 5816

Re: hyperbola-quintessence

Wow, you are really fast, thanks for reply ...
Now I see how it works, really simple and clever. It seems that reversed bitboards are not so much reversed actually :D
Filip
by tvrzsky
Mon Aug 27, 2007 10:40 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: hyperbola-quintessence
Replies: 12
Views: 5816

Re: hyperbola-quintessence

Please Gerd, could You be so kind and give me the definition of bswap(), or am I asking for too much ... ? Is it reversing bits or just only swaping bytes? Yes, I am too lazy to figure it myself ... :oops:
Thanks
Filip
by tvrzsky
Sun May 20, 2007 9:08 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Perishing Perft !
Replies: 34
Views: 23040

Re: Perishing Perft !

Quick Perft (7) takes only 8.9 sec on my new Core 2 Duo machine (E6600, 2.4GHz)! 8-) It seems that I have got perhaps even little bit faster compilation of your Perft, on my Core2Duo T5500@1.66GHz it takes only 11.3 sec (by accident, my engine is exactly just as fast, but only in this particular po...
by tvrzsky
Sun May 20, 2007 1:51 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Perishing Perft !
Replies: 34
Views: 23040

Re: Perishing Perft !

Hi, let me show my humble bunch of numbers ... All tests have been done without use of hashing (which I have not implemented in perft), however with hash keys as well as all other unnecessary data structures updated in make/unmake functions (they are the same as in the regular search). Only move eva...
by tvrzsky
Sun May 13, 2007 8:28 pm
Forum: Computer Chess Club: General Topics
Topic: Strelka: Justice in Reverse
Replies: 36
Views: 12199

Re: Strelka: Justice in Reverse

Nr ONE is not solved by either Rybka nor Strelka, so it's obvious that there is some problem with Zugzwang. Nr TWO is solved by BOTH Rybka & Strelka, and that is really strange, because in fact it is the SAME Zugzwang problem, so far I only know engines which either solve BOTH or none of them. This...