Gaia, a free and strong UCI chess engine written in Rust.
See also: gaiachess.fr — the original Gaia website
Gaia 4 is a complete rewrite from C to Rust — not a single line of the original code survived. Back after 20 years.
See also: gaiachess.fr — the original Gaia website
Gaia 4 is a complete rewrite from C to Rust — not a single line of the original code survived. Back after 20 years.
Author: Jean-Francois Romang Rating Chess Engines Diary CEDR=3681
Gaia what's new?
One binary per platform. Windows binaries end in .exe, Linux and macOS have no extension.
On x86-64 the engine selects its SIMD paths at startup from your CPU — AVX2 up to AVX-512+VNNI for the
neural network, PEXT or AVX2 for move generation — so there is nothing to choose.
Gaia 4.2.5 vs other engines:
| Chess System Tal 2.07 E1019 | 2.5/4 | +1 | 4 games |
| Deep Shredder 14 | 2.5/4 | +1 | 4 games |
| Devre 7.0 JA | 2/4 | +0 | 4 games |
| Fritz 21 | 2/4 | +0 | 4 games |
| Bread 4.0.0 | 2/4 | +0 | 4 games |
| Quanticade Phoenix 4.0 | 2/4 | +0 | 4 games |
| Caissa 1.26 JA | 2/4 | +0 | 4 games |
| Rebel 16.5 | 2/4 | +0 | 4 games |
| Astra 7.0 | 2/4 | +0 | 4 games |
| Viridithas 20.0.0 | 2/4 | +0 | 4 games |
| Tcheran 13.0 | 2/4 | +0 | 4 games |
| Renegade 1.3.1 | 2/4 | +0 | 4 games |
| RubiChess 01082026 | 2/4 | +0 | 4 games |
| Cinder 0.6.1 | 2/4 | +0 | 4 games |
| Dragon 3.3 | 2/4 | +0 | 4 games |
| Hobbes 3.0 | 2/4 | +0 | 4 games |
| Obsidian 16.15 | 2/4 | +0 | 4 games |
| Avalanche 4.0.0 | 2/4 | +0 | 4 games |
| Integral 7.0.0 | 1.5/4 | -1 | 4 games |
| Raphael 4.3.0 dev-4a2c693 | 1.5/4 | -1 | 4 games |
| Reckless 0.10.0 | 1.5/4 | -1 | 4 games |
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