diff options
| -rw-r--r-- | src/board/engine.rs | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/src/board/engine.rs b/src/board/engine.rs index 2ff3aed..47890ad 100644 --- a/src/board/engine.rs +++ b/src/board/engine.rs @@ -173,15 +173,18 @@ impl Board { /// Evaluate move for move ordering, prioritizing efficient captures /// where low-value pieces capture high-value pieces fn eval_move(&self, m: Move) -> f32 { - let [source_eval, target_eval] = [m.source, m.target] - .map(|sq| self.piece_by_square(sq)) - .map(|p| { - match p { - Some(p) => p.static_eval(), - None => 0., - } - }); - 2. * target_eval - source_eval + if m.kind == MoveKind::Capture || m.kind == MoveKind::EnPassant { + let [source_eval, target_eval] = [m.source, m.target] + .map(|sq| self.piece_by_square(sq)) + .map(|p| { + match p { + Some(p) => p.static_eval(), + None => 0., + } + }); + return 2. * target_eval - source_eval + } + 0.0 } pub fn negamax_search(&mut self, mut alpha: f32, beta: f32, depth_left: u8, deadline: Instant) -> (f32, Vec<Move>) { |