The Engine Aggressiveness Score Ratinglist
The world's first engine-ratinglist not measuring strength of engines, but engines's style of play !!!
"Elo is not the end to the means, playing style is, and Stefan's EAS tool is still the best around to measure aggressiveness." - Ed Schroeder (Computerchess legend, author of Rebel engine and famous chesscomputers (Mephisto MM IV, Polgar, Milano, Risc and many more!)), 2024
"Very cool! I like the EAS-Tool. Also the game selection was awesome!" - GM Vidit Gujrathi (world ranking #26, Indian Chess Olympiad gold medalist in 2024), 2025/07/28 on Lc0-discord
The EAS-Score is calculated by my Engines Aggressiveness Statistics Tool out of the games of the gamebase of the UHO-Top15 Ratinglist (main-site) (120000 played games overall). Download the tool here
Meanwhile, the scoring-system of the EAS-Tool got really complex, click here and read the EAS-Scoring explanation.
Here the EAS-ratinglist and at the right side (for comparison), the engines and their normal ranking in my UHO-Top15 Ratinglist (see main-site).
Latest update: 2025/08/27: Caissa 1.23
See the full EAS-Statistics of Top15 (+ 2nd ratinglist containing all single-stats): here
See the full UHO Ratinglist (with full EAS-Ratinglist just down below): here
bad avg.win
Rank EAS-Score sacs shorts draws moves Engine/player
-------------------------------------------------------------------
1 155849 22.24% 15.16% 10.56% 75 Stockfish 250817 a512
2 152889 22.06% 14.42% 10.33% 76 Stockfish 17.1 250330
3 138132 18.99% 18.29% 13.02% 73 Torch 4 a512
4 98532 16.25% 10.93% 15.76% 81 Alexandria 8.1 a512
5 97233 17.47% 11.00% 16.08% 77 Berserk 250606 a512
6 94170 13.00% 14.78% 18.52% 76 Horsie 1.1 a512
7 85201 11.68% 12.68% 17.03% 77 Obsidian 250706 a512
8 80153 13.79% 09.41% 17.81% 80 PlentyChess 6.15 a512
9 73803 13.12% 12.09% 20.59% 78 Clover 9.0 a512
10 71225 15.13% 12.94% 23.63% 77 KomodoDragon 3.3 avx2
11 70649 12.69% 11.30% 19.05% 83 RubiChess 250606 a512
12 66810 11.50% 09.95% 21.84% 78 Reckless 250630 bmi2
13 63138 07.86% 11.36% 21.78% 78 Stormphrax 7.0 avx2
14 59725 12.08% 05.61% 19.96% 83 Integral 250805 a512
15 58515 11.27% 08.89% 22.86% 81 Caissa 1.23 a512
16 33919 08.15% 07.46% 28.93% 81 Viridithas 250712
-------------------------------------------------------------------
*** Average length of all won games: 78 moves
| for comparison
UHO-Top15 Ranking
--------------------------
1 Stockfish 17.1 250330
2 Stockfish 250817 a512
3 Torch 4 a512
4 Obsidian 250706 a512
5 PlentyChess 6.15 a512
6 Integral 250805 a512
7 Berserk 250606 a512
8 Reckless 250630 bmi2
9 Alexandria 8.1 a512
10 Caissa 1.23 a512
11 KomodoDragon 3.3 avx2
12 Clover 9.0 a512
13 Viridithas 250712
14 Stormphrax 7.0 avx2
15 Horsie 1.1 a512
16 RubiChess 250606 a512
|
EAS single statistics Highscores (Top 5 Engines)
Mention, all EAS-Stats are percent-values, not absolute numbers. So, a weaker engine (with much fewer wins than (for example) Stockfish), can achieve high EAS-Stats and Highscores, too...
A: Most high-value sacrifices (3+ pawnunits) : [1]:03.53% Stockfish 250817 a512
[2]:03.51% Stockfish 17.1 250330
[3]:02.58% Torch 4 a512
[4]:02.38% Alexandria 8.1 a512
[5]:01.86% Berserk 250606 a512
B: Most sacrifices overall : [1]:22.24% Stockfish 250817 a512
[2]:22.06% Stockfish 17.1 250330
[3]:18.99% Torch 4 a512
[4]:17.47% Berserk 250606 a512
[5]:16.25% Alexandria 8.1 a512
C: Very short wins (45 moves or less) : [1]:01.18% Torch 4 a512
[2]:01.14% Stockfish 17.1 250330
[3]:01.07% Stockfish 250817 a512
[4]:00.94% Alexandria 8.1 a512
[5]:00.79% Reckless 250630 bmi2
D: Most short wins overall : [1]:18.29% Torch 4 a512
[2]:15.16% Stockfish 250817 a512
[3]:14.78% Horsie 1.1 a512
[4]:14.42% Stockfish 17.1 250330
[5]:12.94% KomodoDragon 3.3 avx2
E: Average length of all won games : [1]:073 Torch 4 a512
[2]:075 Stockfish 250817 a512
[3]:076 Horsie 1.1 a512
[4]:076 Stockfish 17.1 250330
[5]:077 Berserk 250606 a512
F: Smallest number of bad draws : [1]:10.33% Stockfish 17.1 250330
[2]:10.56% Stockfish 250817 a512
[3]:13.02% Torch 4 a512
[4]:15.76% Alexandria 8.1 a512
[5]:16.08% Berserk 250606 a512
The EAS-tool is based on my Sacrifice Games Search Turbo Tool. Use this tool for searching games with sacrifices, only. It is extremly fast and allows to search big pgn-databases very quickly. Download it right here