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.

[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).

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.

My CPU supports SSE41 or AVX compilation, but unfortunately, even though this program is labeled "Universal," it won't load; something needs to be fixed...
Flavio/