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: 2026/07/09: Stormphrax 8.0.0
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 254714 21.37% 31.43% 22.83% 11.16% 74 Stockfish 260614
2 250242 20.52% 33.94% 24.96% 13.59% 73 Torch 4d a512
3 239209 21.01% 33.68% 20.94% 12.98% 75 Stockfish 18 260131
4 180500 17.23% 29.54% 17.93% 15.77% 78 Reckless 260502 a512
5 176848 14.77% 31.62% 20.70% 18.81% 76 PlentyChess 8.0.0
6 156409 11.35% 36.05% 17.73% 19.26% 77 Obsidian 250706 a512
7 152565 13.12% 33.02% 17.85% 18.95% 79 Alexandria 9.0 a512
8 152036 16.39% 29.79% 15.56% 17.06% 77 Berserk 14.0 a512
9 141976 15.62% 33.67% 12.48% 20.19% 80 Stormphrax 8.0.0
10 136689 09.01% 40.61% 13.49% 20.52% 78 Quanticade 260617 a512
11 126970 12.56% 24.20% 16.94% 26.14% 78 Halogen 16.5 a512
12 124397 08.48% 25.47% 17.65% 20.07% 77 Raphael 4.2.0 a512
13 117926 12.60% 28.94% 09.82% 20.26% 82 Pawnocchio 2.0 a512
14 114593 09.46% 32.96% 11.78% 21.64% 80 Viridithas 20.0 a512
15 113558 12.85% 25.00% 13.91% 22.18% 80 Caissa 1.25 a512
16 96964 11.11% 27.51% 08.56% 22.41% 83 Integral 250805 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]:40.61% Quanticade 260617 a512
[2]:36.05% Obsidian 250706 a512
[3]:33.94% Torch 4d a512
[4]:33.68% Stockfish 18 260131
[5]:33.67% Stormphrax 8.0.0
B: Most sacrifices overall : [1]:21.37% Stockfish 260614
[2]:21.01% Stockfish 18 260131
[3]:20.52% Torch 4d a512
[4]:17.23% Reckless 260502 a512
[5]:16.39% Berserk 14.0 a512
C: Very short wins (48 moves or less) : [1]:02.21% Stockfish 260614
[2]:01.84% Stockfish 18 260131
[3]:01.77% Torch 4d a512
[4]:01.77% Reckless 260502 a512
[5]:01.54% PlentyChess 8.0.0
D: Most short wins overall : [1]:24.96% Torch 4d a512
[2]:22.83% Stockfish 260614
[3]:20.94% Stockfish 18 260131
[4]:20.70% PlentyChess 8.0.0
[5]:17.93% Reckless 260502 a512
E: Average length of all won games : [1]:073 Torch 4d a512
[2]:074 Stockfish 260614
[3]:075 Stockfish 18 260131
[4]:076 PlentyChess 8.0.0
[5]:077 Berserk 14.0 a512
F: Smallest number of bad draws : [1]:11.16% Stockfish 260614
[2]:12.98% Stockfish 18 260131
[3]:13.59% Torch 4d a512
[4]:15.77% Reckless 260502 a512
[5]:17.06% 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