TOP 20:
# PLAYER : RATING ERROR POINTS PLAYED (%) 1 Stockfish 17 : 3665 28 3629.5 5710 63.6% 2 Berserk 13 : 3589 29 1915.5 3800 50.4% 3 Obsidian 13 : 3588 29 841.5 1888 44.6% 4 PlentyChess 2.1.0 : 3579 29 2009.0 3790 53.0% 5 Alexandria 7.0.0 : 3557 28 1721.5 3420 50.3% 6 Caissa 1.20 : 3555 28 1710.5 3417 50.1% 7 Clover 8.0.2 : 3537 29 1622.5 3420 47.4% 8 RubiChess 20240112 : 3526 28 1584.0 3789 41.8% 9 Seer 2.8.0 : 3509 33 114.5 380 30.1% 10 Koivisto 9.0 : 3499 26 1673.5 3420 48.9% 11 Rebel 16.3 : 3485 30 209.0 770 27.1% 12 Slowchess 2.8 : 3426 37 219.0 340 64.4% 13 Minic 3.30 : 3316 27 659.0 1412 46.7% 14 Black Marlin 7 : 3281 27 681.0 1792 38.0% 15 Arasan 23.3 NNUE : 3281 35 129.5 340 38.1% 16 Fire 8.1 : 3281 29 321.5 612 52.5% 17 Pedone 3.1 : 3277 26 591.5 952 62.1% 18 Igel 3.05 : 3276 25 798.0 1496 53.3% 19 Komodo 14 : 3272 27 1137.0 5320 21.4% 20 Ethereal 13 classic : 3260 31 249.0 408 61.0%
Update: Added Stockfish 17, Obsidian 13, Caissa 1.20, Clover 8.0.2, PlentyChess 2.1.0 and Alexandria 7.0.0.
Click here to download the complete rating list:
The rating list is updated to 15/09/2024, it is calculated with Ordo and it is based on the following assumptions.
- The Elo score of Rebel 6 UCI version is fixed at 2470, therefore it acts as an “anchor” for all the other engines. I calculated this score as the average between results obtained by the engine againsts humans players in the ’90, with the sources I was able to recover in Internet (Talkchess.com, Rebel14.nl, forums…).
- Besides Rebel 6, Fritz Brains in Bahrain is also used, at a speed of 3500 kN/s, with its rating fixed at 2800 elo.
- Time for each match has been fixed to 40 moves/120 minutes repeated, calibrated on a Pentium 90 processing power. The processing power has been emulated, after estimation by using benchmarks with real P90 results. Accordingly, on modern PC the effective match time was fixed to 40 moves/125” or 40/130” depending on the PC used for the test, with expected results similar to blitz matches. For some chess engines, such as for example Chess Titans, it was not possible to define the same match time; for this reason, I have shown for this engine, the characteristic of the PC used.
- The opening suite consists of 190 positions, which are repeated for each engine (each engine plays each opening one as white, and one as black). For older engines, which do not uses standard UCI of XBoard interfaced (such as Battlechess for example), I’ve reproduced by hand the moves as indicated by the programs. The time for this engines has been calibrated on the processing power of a Pentium 90 as well. For all this reasons, the number of match of these engines are few, and based on random selection of the 34 opening positions. The opening suite is downloadable here.
- All the tested chess engines are freely downloadable from Intenet, except for the programs I’ve bought myself years ago, and are all limited to 1 core.
- Only the best version of Stockfish is shown in the “Top 10”, I’ve removed all derivatives (such as Shashchess for example). In the full rating list I’ve included them all (past SF versions, derivatives, clones…).
- The main goal of this rating list, made for my exclusive enjoyment, was to estimate the level of play of modern engines, with respect to the older ones, but also to evaluate the actual playing strenght of many engines I loved in my youth (the already cited Battleches, for example).