New engine releases 2026 H2

[Joseph]

Ursus 1.1.0 is released:
https://github.com/zchown/Ursus/releases/tag/v1.1.0

[Joseph]

Zigqueen 6.0.0:
https://github.com/stierms/zigqueen/releases/tag/v6.0.0

[Andres Valverde]

EveAnn 6.0 released

https://sites.google.com/view/dirtychess/dirtychess

[Spunc595]

LunaCE new release v2. 5.0

https://github.com/Spunc595/Luna-Chess-Engine

[Joseph]

Luna CE 3.0.0 & Luna CE 3.1.0.

https://github.com/Spunc595/Luna-Chess-Engine/releases

[Sylwy]

CODA-0.9.4 SUPER !!!

https://github.com/adamtwiss/coda/releases/tag/v0.9.4

[Andres Valverde]

Dirty Urusel released

https://sites.google.com/view/dirtychess/dirtychess

[Andres Valverde]

Dirty Urusel released

https://sites.google.com/view/dirtychess/dirtychess

Sorry , the file has been locked by Google. Willl advice when it is unlocked

[voffka]

Hi there,

Igel 3.7.0 at https://github.com/vshcherbyna/igel/releases/tag/3.7.0 (official executable binaries for Windows and source code).

This release brings support for Fischer Random Chess and various improvements in search and evaluation.

What's new:

* fix draw detection
* fix history overflow
* fix mate score for probcut
* use fifty move guard on tt in qsearch
* update piece stack for null move pruning
* improve tt replace strategy
* fix ply coherence in singular search
* fix undefined behavior in history
* fix undo bug
* apply incheck futility guard
* use tt for skipmove positions
* order moves during probcut
* detect bmi2 in basic makefile
* revert standard network back to c049c117
* support vnni256
* optimize quiets pickup
* speed-up castling
* store tt wdl result as a bonus
* fix tb probing with wrong castling rights
* reduce tt captures
* minimize see calls
* implement finny table
* implement counter move table
* track best move stability
* use tt for null moves
* release new standard network
* implement evalfile parameter
* fix tb tt bug
* restore hce build for tcec
* probe dtz
* fix tt castling bit for frc
* cache hash entry
* speed-up inferencing code
* implement avx512 support
* improve voting system
* fix gcc14 build
* implement frc mode
* improve speed
* support longer games
* optimize sort
* penalize bad captures

Regression run against Igel 3.6.0 at Long Time Control (60+0.6)

Code: Select all

Score of Igel 3.7.0 64 BMI2 AVX512 VNNI512 vs Igel 3.6.0 64 BMI2 AVX2: 6161 - 1832 - 7449  [0.640] 15442
Elo difference: 100.1 +/- 3.9, LOS: 100.0 %, DrawRatio: 48.2 %

Regression run against Igel 3.6.0 at Short Time Control (10+0.1)

Code: Select all

Score of Igel 3.7.0 64 BMI2 AVX512 VNNI512 vs Igel 3.6.0 64 BMI2 AVX2: 7122 - 2188 - 7167  [0.650] 16477
Elo difference: 107.3 +/- 4.0, LOS: 100.0 %, DrawRatio: 43.5 %

In case of any questions/suggestions please ask them in the main Igel thread at viewtopic.php?p=996810#p996810

[Roland Chastain]

Hippocampe. CECP engine written in C by Jérémy Pages. Maintained by R. Chastain.

New: Discovered and fixed a bug in castling generation.

Git repository: https://codeberg.org/rchastain/hippocampe

Linux & Windows 64-bit binaries: https://msegui.net/downloads/chess/