Solo 2.2.0 JA - new version chess engine

SoloEngine - UCI chess engine

Author: Yunus Emre Yıldız

SoloEngine 2.2.0 what's new?

What's Changed

NNUE optimizations for the compiler. by @yunusemreyldz07 in #110

Lazy Updates optimization for NNUE was added. by @yunusemreyldz07 in #111

Smarter time management was added. by @yunusemreyldz07 in #112

Replaced "dynamic memory" pv tables with "static memory" ones. by @yunusemreyldz07 in #113

Small singular extensions bugfix by @yunusemreyldz07 in #114

Added a movepicker for lazy movegen etc. by @yunusemreyldz07 in #115

Added movepicker and remade movegen, changed to lazy movegen and lazy move legality check. by @yunusemreyldz07 in #116

Tiny bugfix about castling rights in given FENs by @yunusemreyldz07 in #117

Added improving heuristic in RFP. by @yunusemreyldz07 in #118

Added improving heuristic in LMP by @yunusemreyldz07 in #119

TT Adjusted NMP margin by @ProgramciDusunur in #120

Negative extensions by @ProgramciDusunur in #121

Verification search for NMP was added by @yunusemreyldz07 in #122

Cleaning code structure and stuff for clear code and readibility by @yunusemreyldz07 in #123

There was a bug which caused history tables to get cleared after every "position" uci command. Fixed. by @yunusemreyldz07 in #124

Full Changelog: v2.1.0...v2.2.0

Progress Test against v2.1.0

Elo   | 301.87 +- 19.97 (95%)

Conf  | 8.0+0.08s Threads=1 Hash=8MB

Games | N: 1006 W: 723 L: 18 D: 265

Penta | [0, 1, 40, 218, 244]

Stash 37 vs v2.2.0

Score of Stash_37 vs Solo_2.2.0: 207 - 157 - 130  [0.551] 494

...      Stash_37 playing White: 118 - 70 - 59  [0.597] 247

...      Stash_37 playing Black: 89 - 87 - 71  [0.504] 247

...      White vs Black: 205 - 159 - 130  [0.547] 494

Elo difference: 35.3 +/- 26.4, LOS: 99.6 %, DrawRatio: 26.3 %

SoloEngine 1.2.2 vs other engines:

Critter 1.6a	0/4	-4	4 games
Plisco 1.0.2	2/2	+2	2 games
August3 1.0.0	2/2	+2	2 games
Kiy 1.0	2/2	+2	2 games
AspireBot v1	2/2	+2	2 games
Laura 1.1.0	2/2	+2	2 games
Marvin-onnx 1.0.1	2/2	+2	2 games
DeepBecky 0.2	1.5/2	+1	2 games
Rusty-rival 1.0.24 rc4	1.5/2	+1	2 games
Ratsu 0.9.0	1.5/2	+1	2 games
Radiance 4.2	1/2	+0	2 games
Rapant 2025-05-28	1/2	+0	2 games
Raphael 2.3	0.5/2	-1	2 games
Rusty-rival 1.0.24 rc17	0.5/2	-1	2 games
Aconcagua 5.0.0	0.5/2	-1	2 games
Prune 3.1.0 JA	0/2	-2	2 games
Raphael 2.3 JA	0/2	-2	2 games
Gyatso 1.2.0	0/2	-2	2 games
Clockwork dev-20260128	0/2	-2	2 games
Amira 1.82 JA	0/2	-2	2 games
Caligula 4.0	0/2	-2	2 games

Jim Ablett compiles:

Solo 2.2.0 JA download