Revolution - Revolution is a free, open-source UCI chess engine derived from Stockfish. Jorge Ruiz Centelles, with credit to ChatGPT, modifies and extends the code to explore new concepts. The engine implements cutting-edge search algorithms combined with neural network evaluation. Derived from fundamental chess programming principles, Revolution analyzes positions through parallelized alpha-beta search enhanced with null-move pruning and late move reductions.
As a UCI-compliant engine, Revolution operates through standard chess interfaces without an integrated graphical interface. Users must employ compatible chess GUIs (Arena, Scid vs PC, etc.) for board visualization and move input. Consult your GUI documentation for implementation details.
Revolution 3.40 081125 what's new?
Our automated testing pipeline (“Codex”) has formally green-lit Revolution 3.40-081125 after an extended SPRT A/B match against the current baseline (Revolution 3.10-300925). The new build shows a consistent, statistically supported gain at a practical rapid time control, with no evidence of instability or regression.
Over 1,500 games at 10+0.1, 2 threads, 32MB hash, using the UHO_Lichess_4852_v1.epd suite, the DEV build achieved:
Elo delta: +5.33 ± 9.11 (nElo: +10.29 ± 17.58) in favour of the new DEV
Score: 50.77 % (394 wins / 371 losses / 735 draws)
LOS (Likelihood of Superiority): 87.43 % vs baseline
Draw ratio: 50.27 %
PairsRatio: 1.13 (effectively pair-clean, good colour symmetry)
Pentanomial (Ptnml(0-2)): [5, 170, 377, 193, 5], WL/DD ratio: 1.03
SPRT: LLR 0.28 (9.5 %) in the acceptance band [0.00, 2.50]
In plain terms: Revolution 3.40-081125 is reliably stronger than the previous stable release under realistic tournament conditions, and the match conditions (pairing, colour balance, openings) were sufficiently clean to trust the result. Given Codex’s OK, the SPRT outcome, and the absence of pathological behaviour in the accompanying PGN and logs, we consider this build a safe and justified upgrade to publish as the next official release.
Revolution 2.90 231025 vs other engines:
| Artemis 18.7TR | 10/20 | +0 | 20 Games |
| Omega Explorer 121025 | 10/20 | +0 | 20 Games |
| SugaR 1.0.1 | 10/20 | +0 | 20 Games |
| JudaS 1.0.1 | 10/20 | +0 | 20 Games |
| Stockfish dev-20251014 | 10/20 | +0 | 20 Games |
| HypnoS 1.00 | 9.5/20 | -1 | 20 Games |
| CorChess 20251005 | 9.5/20 | -1 | 20 Games |
| ShashChess 40 | 9.5/20 | -1 | 20 Games |
| Stockfish 17.1 | 9.5/20 | -1 | 20 Games |
| Raid 4.7 | 9.5/20 | -1 | 20 Games |
Revolution 3.50 131125 - download
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