0.3.0

This version features a ground-up rebuild of the evaluation function for a significant strength improvement over version 0.2.2

STC:
ELO   | 206.78 +- 10.22 (95%)
CONF  | 8.0+0.08s Threads=1 Hash=8MB
GAMES | N: 5000 W: 3446 L: 778 D: 776

LTC:
ELO   | 241.04 +- 10.46 (95%)
CONF  | 60.0+0.60s Threads=1 Hash=64MB
GAMES | N: 5000 W: 3568 L: 566 D: 866

These self-play results are likely inflated, and comparing Cheers 0.3.0 to other engines will result in smaller Elo gains over 0.2.2.

Evaluation data

On top of creating a stronger evaluation function with the existing dataset, the open lichess-big3-resolved dataset was incorporated for another large strength increase.

Bugfixes

This release fixes a long-standing 'bug' in the reporting of castling moves in regular chess vs. chess960. cutechess-cli, a de-facto standard of sorts, will accept 960-style castling (king takes friendly rook) regardless of the UCI_Chess960 setting, but other programs will crash if regular castling (king moves 2 squares) is not used. #2

This release properly respects the UCI_Chess960 setting and will report castling correspondingly. As to what the 'correct' behaviour should be, it is underspecified in the UCI documentation.