Stefan Pohl Computer Chess

private website for chessengine-tests

The Engine Aggressiveness Score Ratinglist

The world's first engine-ratinglist not measuring strength of engines, but engines's style of play !!!

The EAS-Score is calculated by my Engines Aggressiveness Statistics Tool out of the games of the gamebase of the SPCC-ratinglist (main-site) (more than 180000 played games overall). Download the tools here

The tools are searching for sacrifices in games (from 1 pawnunit-sacs up to 5+ pawnunit-sacs and Queen-sacs) and for won games, which are very short (split into games up to 40/45/50/55/60 moves), Because a weaker player can be playing aggressive, too, the EAS-Score (= Engine Aggressivenes Score, see explanation below) and all other statistics are build on percents from the won games of an engine/player. So, if an engine has won more games, it must win more short games or win games with sacrifices. A weaker engine, which has won less games, need less wins of short games or win games with sacrifices.

EAS-Score is: (percent*100) of the percent-values of the sacs (1-5+ pawnunits) calculated out of the won games by the engine, only. So, a weak engine (with a small number of won games) can get a high EAS-scoring, too, when the percentof sac-games in the won games is high (and the number of short wins). Higher pawnunits-sacs give bonus-points:
1 pawnsac = 2x points *** 2 pawnsac = 10x points *** 3 pawnsac = 20x points *** 4 pawnsac = 40x points *** 5+ pawnsac = 80x points *** 5+ Queensac = 150x points

Additionally, very short won games (percent*100) give bonus-points. If the short games ended before endgame (a check for low material is done), then these points are doubled:
60 moves= 1x points *** 55 moves= 2x points *** 50 moves= 5x points ***45 moves= 10x points *** 40 moves= 30x points.

Here the EAS-ratinglist and at the right side (for comparsion), the engines and their normal ranking in my SPCC-ratinglist (see main-site). Because calculating the EAS-Scores takes a lot of effort, it is possible, that the 2 ratinglists here will not always include the latest updates of my SPCC-ratinglist from the main-site - sorry for that.

Latest update: 2022/08/14: Minic 3.26

See the full EAS-statistics (2nd ratinglist is below the EAS-ratinglist with all stats): here

Rank EAS-Score sacs shorts Engine/player ----------------------------------------------------- 001 086819 31.32% 44.61% Velvet 4.0.0 avx2 002 074742 35.60% 33.90% Uralochka 3.37c avx2 003 071372 35.28% 36.70% Dragon 3 aggressive 004 070776 30.64% 30.37% Danasah 9.0 avx2 005 047437 22.89% 23.52% Slow Chess 2.9 avx2 006 047277 23.83% 21.08% Arasan 23.3 avx2 007 045794 18.81% 29.73% Wasp 5.50 avx 008 042414 23.29% 18.87% Fire 8.NN MCTS avx2 009 041107 22.98% 23.82% Lc0 0.29 dnll 791921 010 040974 27.42% 19.87% Stockfish 220724 avx2 011 040963 22.71% 18.90% Rebel 15.1 avx2 012 039823 27.37% 20.67% Stockfish 220806 avx2 013 036445 19.61% 25.87% Tucano 10.00 avx2 014 036259 22.30% 24.04% Stockfish final HCE 015 034426 22.28% 12.26% Fire 8.NN avx2 016 033752 14.78% 34.57% Marvin 6.0.0 avx2 017 031992 21.38% 22.33% RubiChess 220223 avx2 018 029372 18.23% 18.60% Revenge 3.0 avx2 019 029282 23.40% 18.61% Stockfish 15 220418 020 028889 14.53% 25.64% Weiss 2.0 popc 021 025745 20.53% 20.91% Fritz 18 nnue avx2 022 025014 14.27% 20.12% Minic 3.22 znver3 023 024052 21.71% 07.13% Coiled 1.1 avx2 024 023923 24.38% 18.51% KomodoDragon 3.1 avx2 025 023599 12.90% 24.83% Combusken 2.0.0 amd64 026 023014 22.47% 16.89% KomodoDragon 3.1 MCTS 027 022345 23.86% 05.21% Gogobello 3 avx2 028 022284 12.87% 27.53% Chiron 5 x64 029 021757 14.99% 18.10% Scorpio 3.0.14d cpu 030 021261 16.62% 20.80% Nemorino 6.00 avx2 031 021086 14.99% 18.29% rofChade 3.0 avx2 032 019797 09.84% 22.68% Stash 33.0 popc 033 017141 16.38% 17.29% Igel 3.1.0 popavx2 034 015424 11.17% 12.84% Halogen 10.23.11 avx2 035 015314 11.37% 17.38% Seer 2.5.0 avx2 036 015194 14.36% 15.11% Minic 3.26 znver3 037 014462 10.29% 16.83% Black Marlin 7.0 avx2 038 013497 12.82% 04.86% Koivisto 8.13 avx2 039 010913 10.01% 13.48% Clover 3.1 avx2 040 010783 16.09% 04.18% Ethereal 13.75 nnue 041 010612 10.47% 12.38% Caissa 0.8 avx2 042 009403 11.14% 06.24% Berserk 9 avx2 043 008506 09.43% 06.20% Zahak 10.0 avx

SPCC Ranking -------------------------- 1 Stockfish 220806 avx2 2 Stockfish 220724 avx2 3 Stockfish 15 220418 4 KomodoDragon 3.1 avx2 5 KomodoDragon 3.1 MCTS 6 Berserk 9 avx2 7 Revenge 3.0 avx2 8 Koivisto 8.13 avx2 9 Ethereal 13.75 nnue 10 Fire 8.NN avx2 11 Slow Chess 2.9 avx2 12 Stockfish final HCE 13 Fire 8.NN MCTS avx2 14 rofChade 3.0 avx2 15 RubiChess 220223 avx2 16 Seer 2.5.0 avx2 17 Minic 3.26 znver3 18 Rebel 15.1 avx2 19 Uralochka 3.37c avx2 20 Black Marlin 7.0 avx2 21 Nemorino 6.00 avx2 22 Igel 3.1.0 popavx2 23 Minic 3.22 znver3 24 Arasan 23.3 avx2 25 Halogen 10.23.11 avx2 26 Clover 3.1 avx2 27 Tucano 10.00 avx2 28 Wasp 5.50 avx 29 Fritz 18 nnue avx2 30 Velvet 4.0.0 avx2 31 Coiled 1.1 avx2 32 Scorpio 3.0.14d cpu 33 Dragon 3 aggressive 34 Marvin 6.0.0 avx2 35 Gogobello 3 avx2 36 Zahak 10.0 avx 37 Lc0 0.29 dnll 791921 38 Weiss 2.0 popc 39 Combusken 2.0.0 amd64 40 Caissa 0.8 avx2 41 Stash 33.0 popc 42 Chiron 5 x64 43 Danasah 9.0 avx2

All-time Top10 EAS-Ratinglist

This ratinglist contains the 10 engines / engine-versions (later and stronger versions of engines often play less aggressive!) with the highest EAS-score out of my full ratinglist (all tested engines since 2020, except Stockfish Dev-versions). If the same engine would be part of this Top10 list with different versions, the engine-version with the highest EAS-Score is chosen. The full EAS-Ratinglist can be found below the SPCC full-ratinglist - just click here and scroll down...The Elo-numbers were taken from the SPCC full-ratinglist at the time, this Top10 list was updated...

Latest update: 2022/08/03: EAS-Tool got a new and better scoring system, so the list had to be re-calculated...

Rank EAS-Score sacs shorts Engine SPCC-Elo ----------------------------------------------------------------- 001 097059 24.57% 30.02% Pedone 3 avx2 3341 002 086819 31.32% 44.61% Velvet 4.0.0 avx2 3347 003 083896 36.41% 35.46% Revenge 1.0 avx2 3475 004 076422 35.32% 33.98% Uralochka 3.37c avx2 3472 005 071889 31.32% 30.92% Danasah 9.0 avx2 3222 006 070589 29.38% 36.61% Arasan 23.0.1 avx2 3339 007 069045 30.02% 34.50% Rebel 14.1 avx2 3234 008 065509 35.71% 33.18% Dragon 3 aggressive 3299 009 056621 30.03% 23.83% Slow Chess 2.5 avx2 3431 010 050845 19.31% 27.57% Wasp 5.00 avx 3277

My 2cents: Very interesting is Pedone 3 (not Pedone 3.1, this version plays not so aggressive!), because it is a "complete" engine: Pedone 3 is free, supports multi-threading and multiPV-analysis, includes an Android-version and the strength can be limited (0-100%) (interesting for owners of an electronic chess-board, who need an Android engine with limited strength). Velvet and Uralochka for example do not support MultiPV-analyzing, Rebel and Danasah do not support multithreading. Revenge 1 (successor of Pedone) is commercial and has no android-version.

Additionally, Pedone plays 2x-3x more high-sacs (3-5+ pawns) than all other aggressive engines (but less small sacs (1 pawn, 2 pawns)) - very cool, IMO.

Download Pedone 3 here

The EAS-tools are 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

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