Our testers conducted dozens of tests of the chess engine in the month of May, which allowed us to add over 18 thousand games to the CEDR game database. As a result, the latest rating was calculated based on a total of 664,406 games.
The list only includes chess engines that have played at least 500 games in our tests.
The game database has been "cleaned" of games that had less than 10 moves.
Here is a ranking list TOP 20 chess engines, complete ranking lists on our website: RATING
| Chess Engines Diary Rating CEDR – 01.06.2025 | |||||
| generated with Ordo 0.9.9 (anchor Critter 1.6a with 3230) | |||||
| All 664.406 games, Time:3’+3” Minimum 500 games | |||||
| Pl | Engine | CEDR | Score | Games | (%) |
| 1 | Stockfish 20241208 | 3766.4 | 343.00 | 624 | 54.97 |
| Stockfish 17.1 | 3754.2 | 1550.00 | 2868 | 54.04 | |
| 2 | Obsidian 15.04 SE | 3734.7 | 597.50 | 1080 | 55.32 |
| 3 | Alexandria 8.0.0 JA | 3723.6 | 830.00 | 1550 | 53.55 |
| 4 | PlentyChess 4.0.1 | 3719.5 | 1069.50 | 2019 | 52.97 |
| 5 | Dragon 3.3 | 3719.2 | 5341.50 | 10343 | 51.64 |
| 6 | Berserk 20250307b | 3715.4 | 560.50 | 1063 | 52.73 |
| 7 | Caissa 1.22 | 3715.3 | 346.50 | 664 | 52.18 |
| 8 | Integral 7.0.0 JA | 3713.6 | 1080.50 | 1990 | 54.30 |
| 9 | Lc0 0.31.0 | 3704.9 | 343.50 | 654 | 52.52 |
| 10 | Viridithas 17.0.0 | 3695.7 | 742.00 | 1084 | 68.45 |
| 11 | Horsie 1.0.6 JA | 3694.8 | 1149.00 | 2203 | 52.16 |
| 12 | Lizard 11.2 | 3683.3 | 1063.00 | 2068 | 51.40 |
| 13 | RubiChess 20240817 | 3681.8 | 2368.50 | 4590 | 51.60 |
| 14 | Ethereal 14.25 | 3678.8 | 3642.00 | 6681 | 54.51 |
| 15 | Motor 0.8.0 JA | 3673.1 | 1676.00 | 3427 | 48.91 |
| 16 | Clover 8.0.1 | 3670.4 | 701.00 | 1447 | 48.45 |
| 17 | Quanticade Fenrir 1.0 | 3666.8 | 288.00 | 601 | 47.92 |
| 18 | Stormphrax 6.0.0 | 3662.7 | 1018.50 | 2068 | 49.25 |
| 19 | Devre 6.39 JA | 3661.0 | 660.00 | 1290 | 51.16 |
| 20 | Booot 7.4 | 3658.5 | 821.00 | 1701 | 48.27 |
Rating CEDR – 01.06.2025 (Stockfish and clones)
| Rating CEDR – 01.06.2025 (Stockfish and clones) | |||||
| generated with Ordo 0.9.9 (anchor Critter 1.6a with 3230) | |||||
| All 664.406 games, Time:3’+3” Minimum 500 games | |||||
| Pl | Engine | CEDR | Score | Games | (%) |
| 1 | Stockfish 20241208 | 3766.4 | 343.00 | 624 | 54.97 |
| 2 | JigSaw 5.9 | 3764.2 | 1732.00 | 2824 | 61.33 |
| 3 | SpecTral PB 071124 | 3762.5 | 921.00 | 1687 | 54.59 |
| 4 | SF-PRO2 04.12.2024 | 3762.3 | 341.00 | 555 | 61.44 |
| 5 | SF PB 120624 | 3762.0 | 299.00 | 509 | 58.74 |
| 6 | CorChess 20240927 | 3761.9 | 685.50 | 1200 | 57.13 |
| 7 | Polyfish 221009 | 3761.8 | 315.00 | 520 | 60.58 |
| 8 | Killfish 021224 | 3761.6 | 786.00 | 1483 | 53.00 |
| 9 | Stockfish 20241122 Ivec | 3761.1 | 346.50 | 592 | 58.53 |
| 10 | Dark SisTer 4 | 3761.1 | 304.00 | 503 | 60.44 |
| 11 | Sailfish 4.0 | 3760.9 | 534.00 | 1001 | 53.35 |
| 12 | BrainLearn 29 | 3760.5 | 625.00 | 1126 | 55.51 |
| 13 | HypnoS 160524 | 3760.3 | 514.50 | 936 | 54.97 |
| 14 | Yuliana 5.50 | 3760.1 | 1852.00 | 3267 | 56.69 |
| 15 | Tactical Titan | 3759.3 | 1057.00 | 2010 | 52.59 |
| 16 | ShashChess 37 | 3759.2 | 1788.00 | 3328 | 53.73 |
| 17 | Rems Sep24 | 3758.8 | 541.00 | 917 | 59.00 |
| 18 | Artemis 4TR | 3758.5 | 994.00 | 1811 | 54.89 |
| 19 | Perelandra 2.0 | 3758.5 | 375.50 | 645 | 58.22 |
| 20 | Deep Blue 20240518 | 3758.5 | 1407.50 | 2689 | 52.34 |
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