Fix unmaking of capturing move #25

nozaq / shogi-rs

A Bitboard-based shogi library in Rust. Board representation, move generation/validation and time control utilities.

https://docs.rs/shogi/latest/shogi/

MIT License

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Closed na2hiro closed 3 years ago

na2hiro commented 3 years ago

Fixes two issues including #25

When undoing capturing of a promoted piece, the piece should be decremented in hands, but it didn't.
When undoing promoting of a piece,
- It always threw Inconsistent ("Cannot unpromote" case).
- Not covered by unit test, but I believe that bitboard updates were incorrect