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: 2025/10/24: Stockfish 251014
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 267495 22.98% 32.17% 22.91% 09.79% 75 Stockfish 251014 a512
2 249095 18.81% 36.52% 25.49% 13.49% 74 Torch 4 a512
3 241364 21.34% 31.67% 20.32% 11.08% 76 Stockfish 17.1 250330
4 193680 11.97% 39.13% 21.96% 18.32% 76 Horsie 1.1 a512
5 180317 17.20% 34.07% 14.69% 16.18% 81 Alexandria 8.1 a512
6 179978 16.19% 31.86% 18.05% 16.68% 77 Reckless 251012 a512
7 165920 16.68% 28.85% 16.82% 16.24% 77 Berserk 250606 a512
8 163679 12.43% 42.26% 15.76% 19.27% 83 RubiChess 250606 a512
9 163173 11.64% 35.17% 18.13% 17.68% 77 Obsidian 250706 a512
10 145358 15.53% 26.52% 19.98% 24.90% 77 KomodoDragon 3.3 avx2
11 138147 13.38% 27.67% 16.43% 19.82% 78 Clover 9.1 a512
12 137883 13.25% 30.47% 12.93% 18.76% 81 PlentyChess 7 TI a512
13 118010 12.39% 31.18% 08.62% 20.19% 84 Integral 250805 a512
14 112046 10.95% 27.80% 13.67% 23.22% 81 Caissa 1.23 a512
15 111711 07.08% 27.11% 16.30% 22.49% 78 Stormphrax 7.0 avx2
16 73995 07.69% 20.75% 11.06% 28.36% 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]:42.26% RubiChess 250606 a512
[2]:39.13% Horsie 1.1 a512
[3]:36.52% Torch 4 a512
[4]:35.17% Obsidian 250706 a512
[5]:34.07% Alexandria 8.1 a512
B: Most sacrifices overall : [1]:22.98% Stockfish 251014 a512
[2]:21.34% Stockfish 17.1 250330
[3]:18.81% Torch 4 a512
[4]:17.20% Alexandria 8.1 a512
[5]:16.68% Berserk 250606 a512
C: Very short wins (48 moves or less) : [1]:02.16% Stockfish 251014 a512
[2]:02.06% Stockfish 17.1 250330
[3]:01.97% Torch 4 a512
[4]:01.74% Reckless 251012 a512
[5]:01.55% Alexandria 8.1 a512
D: Most short wins overall : [1]:25.49% Torch 4 a512
[2]:22.91% Stockfish 251014 a512
[3]:21.96% Horsie 1.1 a512
[4]:20.32% Stockfish 17.1 250330
[5]:19.98% KomodoDragon 3.3 avx2
E: Average length of all won games : [1]:074 Torch 4 a512
[2]:075 Stockfish 251014 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]:09.79% Stockfish 251014 a512
[2]:11.08% Stockfish 17.1 250330
[3]:13.49% Torch 4 a512
[4]:16.18% Alexandria 8.1 a512
[5]:16.24% 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