Stockfish v2.1 now available

[Gian-Carlo Pascutto]

I'm using GCC 4.6. The speed gain from LTO is bigger than the last few years of GCC development combined, so it's worth verifying whether Stockfish triggers any bugs there or not.

[stevenaaus]

Cheers... the "Skill Level" feature is appreciated.

[Vinvin]

Tord, Marco, Joona, Jim


Thanks as always.

+1

+1

[zamar]

I'm using GCC 4.6. The speed gain from LTO is bigger than the last few years of GCC development combined, so it's worth verifying whether Stockfish triggers any bugs there or not.

Well, I think most Linux distros (at least debian stable) ship with GCC 4.4.
People who want to squeeze the extra speed out and compile with GCC 4.6 can manually add the extra compiler flag in Makefile.

[Jouni]

Wow really impressive so far. Stockfish 2.1 - Rybka 4.1 24,5 - 15,5
and Stockfish 2.1 - Critter 1.01 22,5 - 17,5 (2.0 scored 16 - 24 and 20 - 20 in same matches)! Surprisingly engine size is only 1/3 of 2.0 size.

Jouni

[Albert Silver]

Wow really impressive so far. Stockfish 2.1 - Rybka 4.1 24,5 - 15,5
and Stockfish 2.1 - Critter 1.01 22,5 - 17,5 (2.0 scored 16 - 24 and 20 - 20 in same matches)! Surprisingly engine size is only 1/3 of 2.0 size.

Jouni

It is also a very good example of how little one should rely on such short matches for statistical evidence. Since there is no question R4 is stronger than Critter, the fact that it scored worse than Critter in parallel matches is helpful reinforcement.

[bob]

Wow really impressive so far. Stockfish 2.1 - Rybka 4.1 24,5 - 15,5
and Stockfish 2.1 - Critter 1.01 22,5 - 17,5 (2.0 scored 16 - 24 and 20 - 20 in same matches)! Surprisingly engine size is only 1/3 of 2.0 size.

Jouni

It is also a very good example of how little one should rely on such short matches for statistical evidence. Since there is no question R4 is stronger than Critter, the fact that it scored worse than Critter in parallel matches is helpful reinforcement.

I do not believe that point will _ever_ sink in...

[Jouni]

Sorry to post any result below 20k games BTW FIDE Candidates Matches 2011 are 4 games each.

Jouni

[ernest]

I do not believe that point will _ever_ sink in...

Of course, since probabilities and statistics are inhuman...

[tmokonen]

I can't seem to get the 32 bit Windows compile to work with a Polyglot book. Am I alone in my struggles?