CCRL 40/2 FRC
Downloads and Statistics
April 3, 2021
Testing summary:
Total: 323'540 games
played by 249 programs

White wins: 130'279 (40.3%)
Black wins: 110'397 (34.1%)
Draws: 82'864 (25.6%)
White score: 53.1%

Engine Details

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Stockfish 2.0.1 (3137+18
−17		)Quote
Authors: Marco Costalba, Joona Kiiski, Stockfish team members Links: List of Authors, Homepage, Development Versions, Testing Framework
Stockfish was originally based on Glaurung by Tord Romstad. This engine has a bug which sometimes causes CPU usage to drop to zero and a loss on time. It is likely a chess960 specific bug, and was encountered with about 15 positions in its testing run. Becuase no time losses are permitted in this list, these games were discarded and alternative random positions had to be chosen. Note that in an actual chess tournament, had these positions been encountered, the losses would stand, affecting the engine's game result and tournament ranking. On this ratings list, had the time losses stood, its rating would be lower. Once a bug-fixed Stockfish is produced, all games will be discarded and new ones played.
This is one of the 32 Stockfish versions we tested: Compare them!
OpponentELODiffResultsScoreLOSPerf
–   Rybka 4.13162+6
−6		(+25)42.5 − 57.5
(+24−39=37)
42.5%
42.5 / 100
0.5%
−24
1 0 = = 1 0 = 0 1 0 0 = 0 1 0 1 = = 0 = = 0 0 1 0 1 0 = = = 1 = = = 0 1 = 1 0 1 0 1 0 = = 0 = 1 = 1 = = 0 1 0 = 0 = 0 = 0 0 0 0 0 1 0 0 1 = 0 0 = = 0 1 1 0 1 = = = 1 = = 0 1 0 = 1 = = 0 = = 1 0 0 0 0
–   Critter 1.013161+20
−20		(+24)51 − 49
(+34−32=34)
51.0%
51.0 / 100
3.1%
+31
0 = 1 0 = = 1 = 0 0 = 0 0 0 1 = = 1 = 1 1 1 = 1 = = 0 0 = 0 = 0 0 1 1 = 1 = = 1 1 1 0 1 0 1 0 0 0 0 0 1 = 0 = = 1 = 1 1 = 0 = 1 0 0 1 1 = 1 0 = 0 1 = 1 0 = = = 0 1 1 1 0 0 0 = = 1 1 1 0 1 = = 0 1 = =
–   Critter 0.903104+20
−20		(−33)52 − 48
(+30−26=44)
52.0%
52.0 / 100
99.5%
−19
1 0 0 = = 0 0 0 = = = = = = 0 1 1 = 1 0 = 0 0 = 1 1 1 0 1 = 1 0 1 0 1 1 0 0 1 = 1 = = 1 0 0 = = = = = 1 1 = = = 0 = = = 0 = = = 0 1 0 1 = 1 = = 1 = = 0 = 0 1 0 = = 1 1 = 1 0 = 1 1 1 = 1 = = = = 1 0 0
–   Rybka 33087+13
−13		(−50)58 − 42
(+41−25=34)
58.0%
58.0 / 100
100.0%
+2
1 1 0 = = = = 1 1 1 1 1 = = = 1 1 1 1 1 1 0 1 0 1 = = 1 1 0 1 0 1 0 = 1 0 0 1 = = 1 1 1 0 0 1 = 1 0 1 1 = = = 0 1 0 0 = = = 0 0 = 1 1 = 1 0 1 = 1 = = 0 = = 1 = 0 1 = 1 = = = 0 0 1 = 1 = = 0 0 1 0 1 0
–   Critter 0.803037+19
−19		(−100)70 − 30
(+53−13=34)
70.0%
70.0 / 100
100.0%
+31
= 1 0 1 = 0 1 1 1 = 1 1 1 = = 1 1 1 1 0 1 0 0 1 = 0 1 = 1 1 1 1 1 1 1 1 1 0 1 1 = 1 = 0 = = = 1 = = = = = 1 = 1 = = = 1 0 = = 1 = 1 = = = 0 1 1 1 1 = 1 1 1 1 1 = 1 = 0 0 1 = 1 1 = 1 1 = 1 = 1 1 0 1 1
–   Naum 4.23033+9
−9		(−104)65.5 − 34.5
(+51−20=29)
65.5%
65.5 / 100
100.0%
+4
= = 0 = 1 1 1 1 1 = = 0 0 1 1 1 1 0 1 = 0 = = 1 1 0 1 1 0 1 1 = 1 = 1 0 1 0 1 = 1 0 = = 1 = 1 1 1 0 = 1 0 = 1 0 1 1 = 1 = 1 1 1 = = = = 1 1 = 1 1 1 1 1 0 1 1 0 1 0 = 1 1 = 0 0 1 = 1 1 1 = 0 1 1 0 = =
–   Shredder 123013+8
−8		(−124)68 − 32
(+57−21=22)
68.0%
68.0 / 100
100.0%
+8
1 = 1 1 = 0 0 0 1 1 1 1 1 1 = 1 1 0 1 1 = 1 1 0 1 = 1 1 1 1 1 1 0 0 = 1 1 1 0 0 = 1 1 0 1 = 1 1 0 1 1 1 1 = 1 1 = = 1 = = 0 1 = = 1 1 1 1 1 0 = = = 1 = 1 1 0 0 1 0 0 1 1 1 = 1 1 1 0 0 1 1 1 = 0 = 1 0
–   Spike 1.4 Leiden2942+8
−8		(−195)74 − 26
(+61−13=26)
74.0%
74.0 / 100
100.0%
−22
1 1 = 1 1 = 1 = 1 1 1 0 1 = 0 0 = 1 1 1 = = 0 1 0 = = 1 1 = 1 1 1 1 1 1 0 1 1 1 = = 1 1 1 1 1 1 1 = = = 1 0 1 1 = = 0 1 = 1 1 1 1 1 1 = = 1 0 1 0 1 1 1 = 1 = 1 = 1 1 1 = 1 0 1 1 1 1 0 = 1 0 1 1 1 1 =
–   Hiarcs 13.22928+8
−8		(−209)76 − 24
(+67−15=18)
76.0%
76.0 / 100
100.0%
−6
1 0 0 1 = 1 1 1 1 = = 1 = 1 1 1 0 1 = = 1 1 1 1 1 0 1 1 0 1 1 = 1 = 1 = 1 1 1 0 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 = 1 = 1 1 0 = 1 0 1 0 1 = 1 1 1 1 1 0 1 0 1 1 = 1 0 1 1 1 = 1 1 = 1 0 1 = 1 0 1 1 1 = 1 1
–   Hiarcs 13.12898+16
−16		(−239)80 − 20
(+68−8=24)
80.0%
80.0 / 100
100.0%
−13
1 1 1 1 = = 1 1 1 1 = = 1 1 1 1 = 1 1 1 1 = 1 1 1 0 1 1 1 1 0 = 1 1 1 1 1 = 1 = 1 1 = 1 1 1 1 = 1 = 1 1 1 1 1 = 1 1 1 = 1 1 = 0 1 1 1 = 1 0 1 1 = = 0 0 1 1 = 1 1 = 1 = 0 1 0 1 1 1 1 1 1 = 1 1 1 = 1 =
–   Deep Sjeng WC20082878+8
−8		(−259)84 − 16
(+77−9=14)
84.0%
84.0 / 100
100.0%
+25
0 1 1 1 1 1 0 1 1 1 1 1 0 0 0 1 1 1 = 1 1 1 1 1 1 1 1 0 1 1 = 1 = 1 1 = 1 1 1 1 0 1 1 1 = = 1 1 1 = 1 1 1 1 1 1 = 1 = 1 1 1 1 1 1 0 1 1 0 1 = 1 1 1 1 1 1 1 1 1 1 1 = = 1 1 1 1 = 1 = 1 1 1 1 1 1 1 1 1
–   Hiarcs 12.12826+12
−12		(−311)85 − 15
(+79−9=12)
85.0%
85.0 / 100
100.0%
−9
= 1 1 1 1 1 = 1 1 1 1 1 1 1 1 = 1 1 1 0 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 0 0 1 1 1 1 = 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 = 1 1 1 1 1 1 1 0 1 1 1 = 1 = 1 1 1 0 = 0 1 1 1 = 1 1 1 = 1 1 = 1 = 1
–   Cyclone xTreme Fear2824+9
−9		(−313)87.5 − 12.5
(+77−2=21)
87.5%
87.5 / 100
100.0%
−13
= = 1 1 1 1 1 1 1 1 1 = = = 1 1 = 1 1 1 = 1 1 = 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 = = 1 = 1 1 1 1 1 1 = 1 1 1 1 1 1 1 = 1 1 1 1 1 1 = 1 1 1 1 = 1 1 = 1 = 1 = 0 1 1 1 1 = = 1 = 1 1 1 1 1 1 1
1300 games: 719 wins, 232 losses, 349 draws (26.8%), score: 68.7%

Testing history

Rating changes by day

Participation in the pure lists

Pure listRankRatingNumber of games
Stockfish 2.0.1
played with current
participants of this list		Represented by
1-2-CPU    500Stockfish 190321
All    500Stockfish 190321
Free    200Stockfish 190321
Free 1-2-CPU    200Stockfish 190321
Free single-CPU    200Stockfish 190321
Open source    100Stockfish 190321
Open source 1-2-CPU    100Stockfish 190321
Open source single-CPU    100Stockfish 190321
Single-CPU    500Stockfish 190321
Created in 2005-2008 by CCRL team
Last games added on April 3, 2021