TOP 20:
# PLAYER : RATING ERROR POINTS PLAYED (%) 1 Stockfish 15.1 : 3728 44 706.0 884 79.9% 2 Berserk 10 : 3559 44 465.5 680 68.5% 3 Koivisto 8.0 : 3505 43 514.0 884 58.1% 4 Rebel 16 : 3504 45 265.0 476 55.7% 5 Slowchess 2.8 : 3451 48 261.5 476 54.9% 6 Rubichess 2021 NNUE : 3412 54 90.5 272 33.3% 7 Seer 2.5 : 3399 51 127.0 340 37.4% 8 Minic 3.30 : 3350 47 166.0 544 30.5% 9 Arasan 23.3 NNUE : 3326 50 138.0 408 33.8% 10 Fire 8.1 : 3311 41 343.0 680 50.4% 11 Igel 3.05 : 3300 37 834.5 1700 49.1% 12 Komodo 13.02 : 3294 45 290.5 680 42.7% 13 Pedone 3.1 : 3292 39 608.0 1020 59.6% 14 Black Marlin 7 : 3288 46 132.0 612 21.6% 15 Ethereal 13 classic : 3275 42 267.0 476 56.1% 16 Xiphos 0.6 : 3205 41 227.5 476 47.8% 17 Rofchade 2.3 : 3159 44 220.0 476 46.2% 18 Booot 6.5 : 3141 44 163.5 476 34.3% 19 Lc0 0.29dev 791982 : 3139 47 140.0 408 34.3% 20 Laser 1.7 : 3130 36 504.5 976 51.7%
Update: added Stockfish 15.1.
Click here to download the complete rating list:
The rating list is updated to 07/12/2022, it is calculated with Ordo and it is bases 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 only 34 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).