Latest Website-News (2014/12/04): Because the score of Stockfish 141112 is still incredible in my Endless RoundRobin tournament, I decided to do a testrun of Stockfish 141112 for my Stockfish-testing, although I already tested Stockfish 141117, which is newer. But as you can see, Stockfish 141117 is a bad regression and Stockfish 141112 is much stronger (+10 Elo). So we have a new best version: Stockfish 141112, which is +53 Elo stronger than Stockfish 5 and +10 Elo stronger than Stockfish 141117. Next test: Stockfish 141130 (result not before Tuesday).
Endless RoundRobin-tournament updated.
Testrun of Firenzina 2.4.3 for my just-for-fun Ippolit-derivative-testing finished ("Experiments"-section).
Stockfish testing
Playing conditions:
Hardware: i7-2630QM 2.0GHz Notebook, Windows 7 Home Premium 64bit, 4GB RAM
Fritzmark: singlecore: 3.97 / 1905 (all engines running on one core, only), average meganodes/s displayed by LittleBlitzerGUI: Houdini: 2.0 mn/s, Stockfish: 1.7 mn/s
Hash: 128MB per engine
GUI: LittleBlitzerGUI (draw at 120moves, resign at 450cp (for 4 moves))
Tablebases: None
Openings: 10moves_SALC_500.epd (download the file at the "Download & Links"-section)
Ponder, Large Memory Pages & learning: Off
Thinking time: 70''+700ms per game/engine (average game-duration: 3.5 minutes)(standardized to the hardware-speed and the thinking time of the excellent FGRL Bullet-ratinglist). One 5000 games-testrun takes 96 hours (=4 days) (running on only 3 of 4 cores). The version-numbers of the Stockfish-development engines are the release-date, written backwards (year,month,day))(example: 141028 = October, 28, 2014), downloaded at
[You must be registered and logged in to see this link.] I always use the latest version of one day, if more than one version per day is released. And I use the version "for modern computers".
Each Stockfish-version plays 1000 games against Houdini 4, Komodo 8, Gull 3, Fire 3, Rybka 4.1.
Latest update: 2014/12/04 (Stockfish 141112)
Current testrun: Stockfish 141130
Download the individual statistics here
Program Elo + - Games Score Av.Op. Draws
1 Stockfish 141112 x64 : 3226 7 7 5000 65.7 % 3110 37.6 %
2 Stockfish 141117 x64 : 3216 7 7 5000 64.3 % 3110 38.3 %
3 Stockfish 141109 x64 : 3215 7 7 5000 64.3 % 3110 37.4 %
4 Stockfish 141102 x64 : 3205 7 7 5000 63.0 % 3110 39.4 %
5 Stockfish 141012 x64 : 3203 7 7 5000 62.7 % 3110 37.7 %
6 Stockfish 141024 x64 : 3202 7 7 5000 62.6 % 3110 38.1 %
7 Stockfish 140928 x64 : 3194 7 7 5000 61.5 % 3110 39.3 %
Below you find the old ORDO-calculation from Stockfish 5 to Stockfish 140928 (old opening-set and with Komodo 7a instead of Komodo 8). Take a look at the draw-rate in both lists and how much the new SALC-set lowered it !!!
Program Elo + - Games Score Av.Op. Draws
1 Stockfish 140928 x64 : 3194 7 7 5000 64.0 % 3091 47.9 %
2 Stockfish 140809 x64 : 3191 7 7 5000 63.6 % 3091 47.2 %
3 Stockfish 140723 x64 : 3190 7 7 5000 63.4 % 3091 46.1 %
4 Stockfish 140611 x64s : 3190 7 7 5000 63.4 % 3091 47.4 %
5 Stockfish 140727 x64 : 3189 7 7 5000 63.3 % 3091 45.2 %
6 Stockfish 140703 x64 : 3188 7 7 5000 63.1 % 3091 46.3 %
7 Stockfish 140628 x64 : 3188 7 7 5000 63.1 % 3091 46.3 %
8 Stockfish 140714 x64 : 3184 7 7 5000 62.6 % 3091 47.4 %
9 Stockfish 140606 x64s : 3183 7 7 5000 62.5 % 3091 47.9 %
10 Stockfish 140623 x64s : 3182 7 7 5000 62.4 % 3091 47.9 %
11 Stockfish 5 140531 x64s : 3173 7 7 5000 61.2 % 3091 48.2 %