Chess.com Computer Ratings: Nov. 2020
Chess.com is pleased to announce the Chess.com Computer Chess Ratings. These ratings are calculated based on performances in the Chess.com Computer Chess Championship, Chess.com's 24/7 computer tournament platform where the best engines are constantly battling. To ensure accurate ratings, we conducted a benchmarking tournament under the Computer Chess Rating List (CCRL) conditions which included engines from the CCRL blitz rating list running on 4 CPUs and the current Ethereal engine, running on our hardware with 90 CPUs. Ethereal scored a performance rating of 3578. All ratings are then derived from performances in this event.
Ratings will be released on the 1st of each month and will be based on games played in the last 60 days. Given rapid developments in computer chess, multiple development versions of engines may have competed in the rating period. Consequently, we caution readers not to interpret these ratings as being the most accurate estimate of each engine's strength. Usually, such estimates are achieved through careful benchmarking by the development team. The Chess.com Computer Ratings are most useful for providing insight into the relative performance of all competing engines in the Chess.com Computer Chess Championship.
Our inaugural rankings include both Stockfish and Stockfish Classic, acknowledging the significant development of NNUE technology which incorporates a neural network evaluation into traditional brute-force engines. The most recent releases of Stockfish with NNUE top both our blitz and bullet lists, while the latest version of Stockfish without NNUE still ranks highly and is retained separately on our list for comparison purposes.
Bullet Ratings (since August 31)
| # | Logos | Engine | Elo | Points | Games | (%) |
| 1 |  |
Stockfish | 3704.7 | 147.5 | 179 | 82 |
| 2 |  |
Leelenstein | 3669.8 | 271 | 339 | 80 |
| 3 |  |
Lc0 | 3664.5 | 108.5 | 138 | 79 |
| 4 | |
Stockfish Classic | 3663.1 | 156 | 200 | 78 |
| 5 |  |
Komodo | 3596.1 | 119.5 | 168 | 71 |
| 6 |  |
Ethereal | 3578 | 1173 | 1669 | 70 |
| 7 |  |
Stoofvlees | 3560.1 | 95 | 140 | 68 |
| 8 |  |
Fire | 3510 | 100 | 166 | 60 |
| 9 |  |
Houdini | 3508.3 | 204.5 | 438 | 47 |
| 10 |  |
DarkQueen | 3458.5 | 77.5 | 138 | 56 |
| 11 |  |
Komodo MC | 3457.4 | 76 | 138 | 55 |
| 12 |  |
Xiphos | 3454.9 | 173.5 | 438 | 40 |
| 13 |  |
Rofchade | 3441.3 | 314 | 799 | 39 |
| 14 |  |
Rubi | 3419.6 | 599 | 1143 | 52 |
| 15 |  |
Laser | 3419.1 | 71 | 140 | 51 |
| 16 |  |
SlowChess | 3410.4 | 260.5 | 669 | 39 |
| 17 |  |
Lc0 CPU | 3402.8 | 5 | 33 | 15 |
| 18 |  |
Shredder | 3364.3 | 60.5 | 140 | 43 |
| 19 |  |
Senpai | 3346.6 | 136.5 | 342 | 40 |
| 20 |  |
Defenchess | 3320.8 | 121.5 | 334 | 36 |
| 21 |  |
Texel | 3301 | 49 | 140 | 35 |
| 22 |  |
Winter | 3297 | 94.5 | 299 | 32 |
| 23 |  |
Wasp | 3288.3 | 48 | 140 | 34 |
| 24 |  |
Vajolet | 3284.1 | 46.5 | 140 | 33 |
| 25 |  |
Andsacs | 3278.3 | 154 | 640 | 24 |
| 26 |  |
Nemorino | 3227.9 | 37.5 | 138 | 27 |
| 27 |  |
BlackMambo | 3015.6 | 14 | 139 | 10 |
Blitz Ratings (since August 31)
| Rank | Logo | Engine | Elo | Points | Games | (%) |
| 1 | |
Stockfish | 3791.4 | 573 | 810 | 71 |
| 2 | |
Stockfish Classic | 3758.9 | 482 | 754 | 64 |
| 3 | |
Komodo | 3691.4 | 452 | 688 | 66 |
| 4 | |
Fire | 3617.3 | 163.5 | 288 | 57 |
| 5 | |
Lc0 CPU | 3582.2 | 392 | 1100 | 36 |
| 6 | |
Komodo MC | 3581.8 | 149.5 | 288 | 52 |
| 7 | |
Xiphos | 3581.1 | 81.5 | 156 | 52 |
| 8 | |
Ethereal | 3578 | 148 | 288 | 51 |
| 9 | |
Rofchade | 3544 | 134.5 | 288 | 47 |
| 10 | |
SlowChess | 3533.9 | 130.5 | 288 | 45 |
| 11 | |
Defenchess | 3475.2 | 59 | 156 | 38 |
| 12 | |
Rubi | 3440.8 | 95 | 288 | 33 |
| 13 | |
Wasp | 3372.4 | 79.5 | 332 | 24 |
| 14 | |
Winter | 3367.2 | 70 | 288 | 24 |
Want to see some of the incredible games played in the Chess.com Computer Chess Championship? Don't miss our "Computer Chess" playlist on YouTube!
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