refactor: cleanup material advantage calculation

1 files changed, 7 insertions, 4 deletions

diff --git a/src/board/mod.rs b/src/board/mod.rs
index e2d4d60..5e2f4e3 100644
--- a/src/board/mod.rs
+++ b/src/board/mod.rs
@@ -44,6 +44,13 @@ pub enum PieceType {
     KingBlack,
 }
 
+impl PieceType {
+    pub fn without_color(&self) -> Self {
+        let index = *self as usize;
+        Self::from(index % 6)
+    }
+}
+
 const PIECE_CHARS: [&str; 12] = [
     "♟︎", "♞", "♝", "♜", "♛", "♚",
     "♙", "♘", "♗", "♖", "♕", "♔",
@@ -147,10 +154,6 @@ impl Board {
         occupancy
     }
 
-    pub fn color_to_move(&self) -> Color {
-        Color::from((self.ply % 2) as u8)
-    }
-
     pub fn print(&self) {
         println!();
         for rank in (0..8).rev() {