Stockfish 1.9 64-bit 1CPU Gauntlets (CCRL 40/40)

[Aser Huerga]

Stockfish 1.9 64-bit 1CPU Gauntlets

Hardware: Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz8x 3074 MHz with 4.096 MB Memory
Operating system: Microsoft Windows XP 64 Bit Professional Service Pack 2 (Build 3790)
All engines 1 CPU
Arena 2.0.1 GUI
128 Hash Tables
3-4-5 EGTBs
Ponder off
Book GrandPQRS-3moves (2.360 starting selected positions, from Norm Pollock collections), each pair plays the same position with switched colours.
40 moves in 23 minutes repeating (adapted to the CCRL 40/40 standard)

Gauntlet I:

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1   Stockfish 1.9 64-bit -3191- 79.5/120
2   Rybka 4 64-bit        3190  13.0/24
3   Naum 4.2 64-bit       3096  9.5/24
4   Critter 0.80 64-bit   3074  8.5/24
5   Hiarcs 13.1           2979  5.0/24
6   Gull 0.12a 64-bit     3040  4.5/24

(All ELOs referred to the last Chess Computer Rating List when tournament starts, except -XXXX- one, wich is referred to performance).

Statistics:

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Stockfish 1.9 64-bit          : 120 (+ 60,= 39,- 21), 66.2 %

Rybka 4 64-bit                :  24 (+  7,=  8,-  9), 45.8 %
Naum 4.2 64-bit               :  24 (+ 10,=  9,-  5), 60.4 %
Critter 0.80 64-bit           :  24 (+ 10,= 11,-  3), 64.6 %
Gull 0.12a 64-bit             :  24 (+ 17,=  5,-  2), 81.2 %
Hiarcs 13.1                   :  24 (+ 16,=  6,-  2), 79.2 %

(All statistic results are from the engine tested view).

Games: http://kirill-kryukov.com/chess/discuss ... 144#p57144

[Aser Huerga]

Gauntlet II:

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1   Stockfish 1.9 64-bit      -3169- 88.0/120
2   Rybka 3 64-bit             3152  15.0/24
3   Zappa Mexico II 64-bit     2968  5.5/24
4   Thinker 5.4C Inert 64-bit  2969  4.5/24
5   Hannibal 1.0a 64-bit       2949  4.0/24
6   Deep Junior 11.2 64-bit    2938  3.0/24

(All ELOs referred to the last Chess Computer Rating List when tournament starts, except -XXXX- one, wich is referred to performance).

Statistics:

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Stockfish 1.9 64-bit          : 120 (+ 68,= 40,- 12), 73.3 %

Rybka 3 64-bit                :  24 (+  3,= 12,-  9), 37.5 %
Thinker 5.4C Inert 64-bit     :  24 (+ 17,=  5,-  2), 81.2 %
Zappa Mexico II 64-bit        :  24 (+ 14,=  9,-  1), 77.1 %
Hannibal 1.0a 64-bit          :  24 (+ 16,=  8,-  0), 83.3 %
Deep Junior 11.2 64-bit       :  24 (+ 18,=  6,-  0), 87.5 %

(All statistic results are from the engine tested view).

Games: http://kirill-kryukov.com/chess/discuss ... 353#p57353

[Aser Huerga]

Stockfish keeps position 2 with the 1.9.1 64-bit version* (now 3173 in CCRL 40/40 1CPU), showing an improvement of 44 ELO points regarding the 1.8 64-bit version, 17 ELO points behind Rybka and 78 ELO points ahead Naum.
http://computerchess.org.uk/ccrl/4040/c ... ons_only=1

* Note the 1.9.1 is the same as 1.9 (bug fix release to restore chess960 support under some GUIs)