Yakka 1.6 - new version chess engine
Yakka - UCI chess engine.
Author: CJDalrymple, Rating Chess Engines Diary CEDR=3259
Yakka is a Chess Engine writen in object pascal (Delphi) that implements the Universal Chess Interface (UCI) protocol.
It is recommended to use a Chess GUI application such as Arena, Banksia GUI Cute Chess.
This project is licenced under the MIT Licence
Future Endevours (TODO)
In no particular order:
- Much experimenting / tweaking
- MultiPV
- Pondering
- Singular Extensions
- Endgame Tablebases
- NNUE
Yakka - what's new?
Yakka v1.6
24 Sep 2026 release.
Implemented support for Syzygy Table Bases and MultiPV.
Playing strength gain due to search parameter tuning and bug fixes.
You can download the precompiled Windows executable: 'Yakka v1.6 x64.exe'
This will run on x86-64 CPU's which support the BMI2 and AVX2 instruction sets.
Yakka 1.3 vs other engines:
| Fire 10 mingw | 1.5/20 | -17 | 20 Games |
| YuliGM Pro 20 | 0/16 | -16 | 16 Games |
| Laser 1.8 beta JA | 2/12 | -8 | 12 Games |
| Critter 1.6a | 1.5/12 | -9 | 12 Games |
| Pawn 4.0.4 JA | 1/12 | -10 | 12 Games |
| PlentyChess 6.0.15 | 0/12 | -12 | 12 Games |
| Rebel Extreme 1.1 | 1/10 | -8 | 10 Games |
| Pawnocchio 1.8.1 | 0.5/10 | -9 | 10 Games |
| Spirit 040825 | 0/10 | -10 | 10 Games |
| Alexander 6.0 | 6/8 | +4 | 8 Games |
| Patricia 5.0 | 2.5/8 | -3 | 8 Games |
| HypnoS ++ 1.03 | 1/8 | -6 | 8 Games |
| Zangdar 5 | 0.5/8 | -7 | 8 Games |
| Wordfish 2.50 dev-210925 | 0.5/8 | -7 | 8 Games |
| Lambergar 1.3 | 0.5/8 | -7 | 8 Games |
| Omega 10 | 0.5/8 | -7 | 8 Games |
| MrBob 1.3.0 JA | 0.5/8 | -7 | 8 Games |
| PlentyChess 6.0.18 | 0.5/8 | -7 | 8 Games |
| Spirit XXL | 0/8 | -8 | 8 Games |
| Stockfish dev-20250906 | 0/8 | -8 | 8 Games |
| ShashChess 39 | 0/8 | -8 | 8 Games |

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