New engine releases & news H1 2026

[cjug74]

I've noticed that, on every blitz game, Juggernaut 2.0 consumes almost all time in a move until it has only 3 seconds left, then it makes the move and all subsequent moves it plays almost instantly. The move that consumes almost all time is normally during middlegame.

I've only tested it on Arena GUI, blitz 3/2 and 5 no increment.

Correction: not on every game, but it happens more or less frequently.

[Rebel]

REBEL-16.5 - Bugfix version, about 10-15 elo stronger due to a new neural network.

. Fixes rare crashes.
. Allows the use of the maximum threads of your PC.

https://rebel7775.wixsite.com/rebel

[Gabor Szots]

We may use this thread even in 2027.

[Paloma]

I hope not.
Link for : New engine releases & news H2 2026

viewtopic.php?t=86481
.
It's not that hard, is it?

[NathanDrake]

Triumviratus 6.0 released

Triumviratus 6.0 is out: +52.98 ± 12.25 Elo over 5.1 (1 thread, 64 MB, UHO 2024 book). Estimated ELO CCRL 40/15: 3620+

GitHub: https://github.com/Tors3/Triumviratus/releases/tag/v6.0

What's new

Network: SFNNv13 arch + two new input blocks: PawnPair (credits Pawnocchio) and PassedPawns (96 features, one per passed pawn). All trained on T80 and some self generated data.

Search: SPSA co-tune, rewritten multiplicative time manager, plus smaller fixes.

Binaries: Windows/Linux (AVX-512, AVX2), Android arm64. Network embedded in each binary.

— Francesco Torsello

P.S. The 5.x versions were never tested on CCRL Blitz, would be great if someone could run 6.0 there too. Thanks in advance!

[Gabor Szots]

A last attempt:

viewtopic.php?t=86481