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: 2026/08/08: Stockfish 260803
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 236298 19.52% 31.12% 24.88% 14.05% 73 Torch 4d a512
2 232799 19.52% 29.43% 20.97% 12.11% 74 Stockfish 260803
3 228071 19.56% 30.93% 21.74% 13.90% 75 Stockfish 18 260131
4 169637 13.32% 31.75% 20.56% 20.02% 76 PlentyChess 8.0.0
5 168781 16.39% 26.57% 17.85% 16.77% 78 Reckless 260502 a512
6 165422 19.06% 30.65% 14.68% 18.01% 81 Triumviratus 6.0 AI
7 157146 14.85% 29.04% 18.11% 17.54% 77 Berserk 14.0 a512
8 149051 11.59% 33.05% 19.10% 19.57% 78 Alexandria 9.0 a512
9 140480 10.05% 32.61% 18.52% 20.49% 77 Obsidian 250706 a512
10 139160 14.16% 33.90% 13.68% 21.00% 80 Stormphrax 8.0.0
11 138387 12.25% 36.34% 11.87% 20.53% 80 Quanticade 260717
12 115435 11.50% 28.30% 12.79% 19.42% 82 Coda 0.9.3 AI
13 113541 09.12% 33.23% 12.78% 23.01% 80 Viridithas 20.0 a512
14 111479 11.95% 27.59% 09.92% 21.62% 82 Pawnocchio 2.0 a512
15 99381 10.21% 29.67% 08.48% 23.45% 83 Integral 250805 a512
16 97886 11.28% 25.90% 11.50% 24.87% 84 Hobbes 3.0 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]:36.34% Quanticade 260717
[2]:33.90% Stormphrax 8.0.0
[3]:33.23% Viridithas 20.0 a512
[4]:33.05% Alexandria 9.0 a512
[5]:32.61% Obsidian 250706 a512
B: Most sacrifices overall : [1]:19.56% Stockfish 18 260131
[2]:19.52% Torch 4d a512
[3]:19.52% Stockfish 260803
[4]:19.06% Triumviratus 6.0 AI
[5]:16.39% Reckless 260502 a512
C: Very short wins (48 moves or less) : [1]:02.08% Stockfish 260803
[2]:01.86% Stockfish 18 260131
[3]:01.77% Torch 4d a512
[4]:01.72% Reckless 260502 a512
[5]:01.55% PlentyChess 8.0.0
D: Most short wins overall : [1]:24.88% Torch 4d a512
[2]:21.74% Stockfish 18 260131
[3]:20.97% Stockfish 260803
[4]:20.56% PlentyChess 8.0.0
[5]:19.10% Alexandria 9.0 a512
E: Average length of all won games : [1]:073 Torch 4d a512
[2]:074 Stockfish 260803
[3]:075 Stockfish 18 260131
[4]:076 PlentyChess 8.0.0
[5]:077 Berserk 14.0 a512
F: Smallest number of bad draws : [1]:12.11% Stockfish 260803
[2]:13.90% Stockfish 18 260131
[3]:14.05% Torch 4d a512
[4]:16.77% Reckless 260502 a512
[5]:17.54% Berserk 14.0 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