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 EAS-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: 2025/12/08: Caissa 1.24
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
early bad avg.win
Rank EAS-Score sacs sacs shorts draws moves Engine/player
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1 261964 21.42% 34.49% 22.31% 11.80% 74 Stockfish 251130 a512
2 241414 18.34% 37.38% 24.60% 14.02% 74 Torch 4 a512
3 241013 21.65% 31.83% 20.18% 11.04% 76 Stockfish 17.1 250330
4 206362 11.96% 41.15% 22.22% 18.55% 75 Horsie 1.1 a512
5 194162 16.61% 34.61% 19.72% 15.76% 77 Reckless 251121 a512
6 172172 15.73% 30.23% 16.01% 15.75% 81 Alexandria 8.1.12 a512
7 168743 16.94% 29.79% 16.78% 16.60% 77 Berserk 250606 a512
8 163512 12.15% 35.61% 17.63% 17.81% 77 Obsidian 250706 a512
9 160344 12.19% 31.91% 18.02% 19.23% 77 PlentyChess 7.0.22 TI
10 159960 13.19% 40.33% 15.79% 19.12% 84 RubiChess 250606 a512
11 138885 15.45% 26.25% 19.16% 24.73% 77 KomodoDragon 3.3 avx2
12 133396 13.33% 26.55% 15.97% 19.91% 79 Clover 9.1 a512
13 115556 12.54% 31.81% 08.70% 21.03% 84 Integral 250805 a512
14 110621 10.46% 24.04% 14.61% 23.06% 80 Caissa 1.24 a512
15 105843 07.45% 25.00% 16.10% 22.56% 78 Stormphrax 7.0 avx2
16 77045 07.70% 24.26% 10.44% 28.10% 80 Viridithas 18.0 a512
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*** Average length of all won games: 78 moves
*** Movelimit for early sac bonus : 39 moves
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: Early sacrifices (percents of all sacs) : [1]:41.15% Horsie 1.1 a512
[2]:40.33% RubiChess 250606 a512
[3]:37.38% Torch 4 a512
[4]:35.61% Obsidian 250706 a512
[5]:34.61% Reckless 251121 a512
B: Most sacrifices overall : [1]:21.65% Stockfish 17.1 250330
[2]:21.42% Stockfish 251130 a512
[3]:18.34% Torch 4 a512
[4]:16.94% Berserk 250606 a512
[5]:16.61% Reckless 251121 a512
C: Very short wins (48 moves or less) : [1]:02.10% Stockfish 251130 a512
[2]:02.07% Reckless 251121 a512
[3]:01.96% Stockfish 17.1 250330
[4]:01.79% Torch 4 a512
[5]:01.60% PlentyChess 7.0.22 TI
D: Most short wins overall : [1]:24.60% Torch 4 a512
[2]:22.31% Stockfish 251130 a512
[3]:22.22% Horsie 1.1 a512
[4]:20.18% Stockfish 17.1 250330
[5]:19.72% Reckless 251121 a512
E: Average length of all won games : [1]:074 Stockfish 251130 a512
[2]:074 Torch 4 a512
[3]:075 Horsie 1.1 a512
[4]:076 Stockfish 17.1 250330
[5]:077 Berserk 250606 a512
F: Smallest number of bad draws : [1]:11.04% Stockfish 17.1 250330
[2]:11.80% Stockfish 251130 a512
[3]:14.02% Torch 4 a512
[4]:15.75% Alexandria 8.1.12 a512
[5]:15.76% Reckless 251121 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