Who is #1?

[Charles]

4 cpu ponder=off Q6600 2.4Ghz 3gb ram Win xp 32 bit all matches on Arena.


128hash tc=0+3s

using mfl modified 30 position suite:
IvanHoe_57a2_w32_SSE2_JR - Rybka 4 w32 : 31.0/60 17-15-28 (=010===11==1=1==11011=00==01====0==1===10000===0=1=01100=1=1) 52%

using nunn 20 positions tc=0+6s
IvanHoe_57a2_w32_SSE2_JR - Rybka 4 w32 : 20.5/40 5-4-31 (====0=====0==========1=1==0===0=1=11====) 51%

using silver suite 50 positions tc=0+3s
IvanHoe_57a2_w32_SSE2_JR - Rybka 4 w32 : 52.0/100 24-20-56 (====1=1=0111=110=1=10=01====00=10====11=0======00=0====0=01=0==1===1========1=1===0==01000==1==11101 ) 52%

R4 used 3,4, and select 5 man tablebases Ivaa2 has NO robbobases set! 32 pawn hash.




The answer is not clear, but it looks from further testing that the followup compiles like a4, and t55 are not as strong as a2 on 32 bit ...but more testing needed. .Also stay tuned for firebird1.1 custom setting with slight lead over r4 .. will post results when finished.


So who is #1? -- The answer is not entirely clear and results vary by system, timecontrol etc.
But one thing is certain Rybka 4 is NOT undisputed short time control champion -- the 40/4 winner is not yet clear.

[gaard]

Likelihood of Superiority table comparing Rybka with IvanHoe and Houdini. From these numbers, I'd say there is a ~8% chance that Rybka is still #1. If Rybka has any advantages over these engines it is probably in SMP efficiency.

Code: Select all

                     Iv Ho Ry St Na Sh Cr Sp Za To Sc
IvanHoe 9.57a           63 77 99 99100 99100100100100
Houdini 1.02         36    65 99 99100 99100100100100
Rybka 4              22 34    99 99100 99100100100100
Stockfish 1.8         0  0  0    99 99 99100100100100
Naum 4.2              0  0  0  0    99 98 99 99100100
Shredder 12 32-bit    0  0  0  0  0    51 99 99 99100
Critter 0.70          0  0  0  0  1 48    99 99 99100
Spark 0.4             0  0  0  0  0  0  0    87 99100
Zappa Mexico II       0  0  0  0  0  0  0 12    99 99
TogaII 1.4b5c         0  0  0  0  0  0  0  0  0    99
Scorpio 2.6           0  0  0  0  0  0  0  0  0  0