New engine releases 2026 H2

[NathanDrake]

Triumviratus 8.0: the first top engine with a mixture-of-experts network

https://github.com/Tors3/Triumviratus/releases/tag/v8.0

Testing Results (partial, matches still running; counted on complete opening pairs, 95% interval):

• vs Stockfish 19: -4.3 ± 6.3 (133+1, 240 games)
• vs Stockfish 18: +3.9 ± 7.5 (133+1, 180 games)
• vs Triumviratus 7.0: +129.9 ± 15.7 (20+0.2, 400 games)
• IQ4 suite (1 s, 1 thread, by Maurizio Platino): 155/183, Stockfish 19 142/183

Main Changes:

• Consilium, a mixture-of-experts network: four experts, one per phase of the game, only one active at a time
• PassedPawns, our own input block for passed pawns
• Restructured search with margins and evaluation corrections per network expert
• New time management: more time when the opponent surprises, less when behind on the clock
• Chess960 support and one executable for every x86-64 CPU

Thanks to Maurizio Platino, Mark Tang and Andres (EveAnn) for their testing (see Credits).

Misleading advertising; if it's a "Universal Compilation," it was supposed to work on SSE41 or AVX, but it doesn't!
Flavio/

I added support for SSE41 or AVX, please check again.

[AdminX]

Triumviratus 8.0: the first top engine with a mixture-of-experts network

https://github.com/Tors3/Triumviratus/releases/tag/v8.0

Testing Results (partial, matches still running; counted on complete opening pairs, 95% interval):

• vs Stockfish 19: -4.3 ± 6.3 (133+1, 240 games)
• vs Stockfish 18: +3.9 ± 7.5 (133+1, 180 games)
• vs Triumviratus 7.0: +129.9 ± 15.7 (20+0.2, 400 games)
• IQ4 suite (1 s, 1 thread, by Maurizio Platino): 155/183, Stockfish 19 142/183

Main Changes:

• Consilium, a mixture-of-experts network: four experts, one per phase of the game, only one active at a time
• PassedPawns, our own input block for passed pawns
• Restructured search with margins and evaluation corrections per network expert
• New time management: more time when the opponent surprises, less when behind on the clock
• Chess960 support and one executable for every x86-64 CPU

Thanks to Maurizio Platino, Mark Tang and Andres (EveAnn) for their testing (see Credits).

Looks interesting, I just finished compiling it and about to take it out for a test drive. Thank You.

[Chacal X]

Triumviratus 8.0: the first top engine with a mixture-of-experts network

https://github.com/Tors3/Triumviratus/releases/tag/v8.0

Testing Results (partial, matches still running; counted on complete opening pairs, 95% interval):

• vs Stockfish 19: -4.3 ± 6.3 (133+1, 240 games)
• vs Stockfish 18: +3.9 ± 7.5 (133+1, 180 games)
• vs Triumviratus 7.0: +129.9 ± 15.7 (20+0.2, 400 games)
• IQ4 suite (1 s, 1 thread, by Maurizio Platino): 155/183, Stockfish 19 142/183

Main Changes:

• Consilium, a mixture-of-experts network: four experts, one per phase of the game, only one active at a time
• PassedPawns, our own input block for passed pawns
• Restructured search with margins and evaluation corrections per network expert
• New time management: more time when the opponent surprises, less when behind on the clock
• Chess960 support and one executable for every x86-64 CPU

Thanks to Maurizio Platino, Mark Tang and Andres (EveAnn) for their testing (see Credits).

Misleading advertising; if it's a "Universal Compilation," it was supposed to work on SSE41 or AVX, but it doesn't!
Flavio/

I added support for SSE41 or AVX, please check again.

What is the link to download AVX or SSE 41 for Windows? The one posted doesn't include it.
Flavio/

[NathanDrake]

Triumviratus 8.0: the first top engine with a mixture-of-experts network

https://github.com/Tors3/Triumviratus/releases/tag/v8.0

Testing Results (partial, matches still running; counted on complete opening pairs, 95% interval):

• vs Stockfish 19: -4.3 ± 6.3 (133+1, 240 games)
• vs Stockfish 18: +3.9 ± 7.5 (133+1, 180 games)
• vs Triumviratus 7.0: +129.9 ± 15.7 (20+0.2, 400 games)
• IQ4 suite (1 s, 1 thread, by Maurizio Platino): 155/183, Stockfish 19 142/183

Main Changes:

• Consilium, a mixture-of-experts network: four experts, one per phase of the game, only one active at a time
• PassedPawns, our own input block for passed pawns
• Restructured search with margins and evaluation corrections per network expert
• New time management: more time when the opponent surprises, less when behind on the clock
• Chess960 support and one executable for every x86-64 CPU

Thanks to Maurizio Platino, Mark Tang and Andres (EveAnn) for their testing (see Credits).

Misleading advertising; if it's a "Universal Compilation," it was supposed to work on SSE41 or AVX, but it doesn't!
Flavio/

I added support for SSE41 or AVX, please check again.

What is the link to download AVX or SSE 41 for Windows? The one posted doesn't include it.
Flavio/

You just need to download the universal build

[NathanDrake]

Triumviratus 8.0: the first top engine with a mixture-of-experts network

https://github.com/Tors3/Triumviratus/releases/tag/v8.0

Testing Results (partial, matches still running; counted on complete opening pairs, 95% interval):

• vs Stockfish 19: -4.3 ± 6.3 (133+1, 240 games)
• vs Stockfish 18: +3.9 ± 7.5 (133+1, 180 games)
• vs Triumviratus 7.0: +129.9 ± 15.7 (20+0.2, 400 games)
• IQ4 suite (1 s, 1 thread, by Maurizio Platino): 155/183, Stockfish 19 142/183

Main Changes:

• Consilium, a mixture-of-experts network: four experts, one per phase of the game, only one active at a time
• PassedPawns, our own input block for passed pawns
• Restructured search with margins and evaluation corrections per network expert
• New time management: more time when the opponent surprises, less when behind on the clock
• Chess960 support and one executable for every x86-64 CPU

Thanks to Maurizio Platino, Mark Tang and Andres (EveAnn) for their testing (see Credits).

Looks interesting, I just finished compiling it and about to take it out for a test drive. Thank You.

Thanks. I suggest using the builds provvided (or using the PGO build script in the repo) for maximum performance.