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.
Latest update: 2026/09/19: Stockfish 260913
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): her
early bad avg.win
Rank EAS-Score sacs sacs shorts draws moves Engine/player
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1 255561 18.84% 30.85% 28.19% 14.97% 73 Torch 4d a512
2 248089 16.83% 31.79% 27.60% 12.96% 74 Stockfish 19 260905
3 231700 16.92% 28.77% 26.61% 14.27% 74 Stockfish 260913
4 178777 13.42% 30.11% 22.72% 20.59% 76 PlentyChess 8.0.0
5 176204 17.78% 32.14% 18.02% 19.62% 81 Triumviratus 7.0 AI
6 173297 16.73% 24.21% 19.24% 17.82% 78 Reckless 260502 a512
7 173044 16.57% 33.11% 18.50% 19.02% 80 Cinder 6.0 a512
8 166994 10.15% 33.04% 22.37% 20.60% 76 Obsidian 250706 a512
9 162738 11.41% 33.44% 21.45% 20.06% 78 Alexandria 9.0 a512
10 141504 14.28% 31.75% 16.66% 21.60% 80 Stormphrax 8.0.0
11 130056 10.89% 29.03% 15.85% 22.64% 79 Quanticade 260810
12 129334 12.13% 27.09% 15.68% 20.48% 79 Integral 8.0 a512
13 116825 15.42% 29.03% 06.31% 18.88% 101 Coda 0.9.4 AI
14 115733 11.91% 26.82% 12.67% 22.52% 82 Pawnocchio 2.0 a512
15 112231 08.39% 29.85% 14.30% 23.64% 80 Viridithas 20.0 a512
16 109683 10.85% 28.57% 13.70% 25.83% 84 Hobbes 3.0 a512
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*** Average length of all won games: 79 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]:33.44% Alexandria 9.0 a512
[2]:33.11% Cinder 6.0 a512
[3]:33.04% Obsidian 250706 a512
[4]:32.14% Triumviratus 7.0 AI
[5]:31.79% Stockfish 19 260905
B: Most sacrifices overall : [1]:18.84% Torch 4d a512
[2]:17.78% Triumviratus 7.0 AI
[3]:16.92% Stockfish 260913
[4]:16.83% Stockfish 19 260905
[5]:16.73% Reckless 260502 a512
C: Very short wins (49 moves or less) : [1]:02.83% Torch 4d a512
[2]:02.65% Stockfish 19 260905
[3]:02.44% Stockfish 260913
[4]:02.05% Reckless 260502 a512
[5]:02.03% PlentyChess 8.0.0
D: Most short wins overall : [1]:28.19% Torch 4d a512
[2]:27.60% Stockfish 19 260905
[3]:26.61% Stockfish 260913
[4]:22.72% PlentyChess 8.0.0
[5]:22.37% Obsidian 250706 a512
E: Average length of all won games : [1]:073 Torch 4d a512
[2]:074 Stockfish 19 260905
[3]:074 Stockfish 260913
[4]:076 Obsidian 250706 a512
[5]:076 PlentyChess 8.0.0
F: Smallest number of bad draws : [1]:12.96% Stockfish 19 260905
[2]:14.27% Stockfish 260913
[3]:14.97% Torch 4d a512
[4]:17.82% Reckless 260502 a512
[5]:18.88% Coda 0.9.4 AI
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