Igel 1.9.0 at https://github.com/vshcherbyna/igel/releases/tag/1.9.0 (binaries for Raspberry Pi, Linux, macOS and Windows).
What's new:
- Support macOS
- Use different base for evaluation parameters and tune them using coordinate descent
- Implement queen and knight mobility evaluation
- Improve mobility evaluations for other pieces to count only free (and not attacked by enemy) squares
- Improve speed when checking time limits
- Fix underrun bug when clearing pieceStack
- Extend recaptures only when searching in PV
- Disable ponder until discovered issues are fixed
Strength improvements over older versions:
Code: Select all
Score of Igel 1.9.0 64 POPCNT vs Igel 1.8.3 64 POPCNT: 922 - 387 - 433 [0.654] 1742
Elo difference: 110.26 +/- 14.59