diff --git a/position/src/move_generator.rs b/position/src/move_generator.rs
index 5a79fb0..e6884d4 100644
--- a/position/src/move_generator.rs
+++ b/position/src/move_generator.rs
@@ -110,7 +110,7 @@ trait MoveGeneratorInternal {
                 .map(|square| {
                     let piece = PlacedPiece::new(piece, square);
                     let move_set =
-                        Self::move_set_for_piece(position, piece, capture_mask, push_mask);
+                        Self::move_set_for_piece(position, &piece, capture_mask, push_mask);
                     (square, move_set)
                 }),
         )
@@ -118,7 +118,7 @@ trait MoveGeneratorInternal {
 
     fn move_set_for_piece(
         position: &Position,
-        piece: PlacedPiece,
+        piece: &PlacedPiece,
         capture_mask: BitBoard,
         push_mask: BitBoard,
     ) -> MoveSet;
diff --git a/position/src/move_generator/bishop.rs b/position/src/move_generator/bishop.rs
index 2fae36f..5630246 100644
--- a/position/src/move_generator/bishop.rs
+++ b/position/src/move_generator/bishop.rs
@@ -14,7 +14,7 @@ impl MoveGeneratorInternal for ClassicalMoveGenerator {
 
     fn move_set_for_piece(
         position: &Position,
-        piece: PlacedPiece,
+        piece: &PlacedPiece,
         capture_mask: BitBoard,
         push_mask: BitBoard,
     ) -> MoveSet {
@@ -49,7 +49,7 @@ impl MoveGeneratorInternal for ClassicalMoveGenerator {
         let quiet_moves = all_moves & (empty_squares | !friendly_pieces) & push_mask;
         let capture_moves = all_moves & opposing_pieces & capture_mask;
 
-        MoveSet::new(piece)
+        MoveSet::new(*piece)
             .quiet_moves(quiet_moves)
             .capture_moves(capture_moves)
     }
diff --git a/position/src/move_generator/king.rs b/position/src/move_generator/king.rs
index c18692a..befd0b2 100644
--- a/position/src/move_generator/king.rs
+++ b/position/src/move_generator/king.rs
@@ -19,7 +19,7 @@ impl MoveGeneratorInternal for KingMoveGenerator {
 
     fn move_set_for_piece(
         position: &Position,
-        placed_piece: PlacedPiece,
+        placed_piece: &PlacedPiece,
         _capture_mask: BitBoard,
         _push_mask: BitBoard,
     ) -> MoveSet {
@@ -39,7 +39,7 @@ impl MoveGeneratorInternal for KingMoveGenerator {
         let quiet_moves = all_king_moves & safe_empty_squares;
         let capture_moves = all_king_moves & opposing_pieces_on_safe_squares;
 
-        let mut move_set = MoveSet::new(placed_piece)
+        let mut move_set = MoveSet::new(*placed_piece)
             .quiet_moves(quiet_moves)
             .capture_moves(capture_moves);
 
diff --git a/position/src/move_generator/knight.rs b/position/src/move_generator/knight.rs
index b4dc1bc..6366808 100644
--- a/position/src/move_generator/knight.rs
+++ b/position/src/move_generator/knight.rs
@@ -14,7 +14,7 @@ impl MoveGeneratorInternal for KnightMoveGenerator {
 
     fn move_set_for_piece(
         position: &Position,
-        placed_piece: PlacedPiece,
+        placed_piece: &PlacedPiece,
         capture_mask: BitBoard,
         push_mask: BitBoard,
     ) -> MoveSet {
@@ -25,7 +25,7 @@ impl MoveGeneratorInternal for KnightMoveGenerator {
         let quiet_moves = knight_moves & empty_squares & push_mask;
         let capture_moves = knight_moves & opposing_pieces & capture_mask;
 
-        MoveSet::new(placed_piece)
+        MoveSet::new(*placed_piece)
             .quiet_moves(quiet_moves)
             .capture_moves(capture_moves)
     }
diff --git a/position/src/move_generator/pawn.rs b/position/src/move_generator/pawn.rs
index 8fef802..c6e7a5a 100644
--- a/position/src/move_generator/pawn.rs
+++ b/position/src/move_generator/pawn.rs
@@ -17,14 +17,14 @@ impl MoveGeneratorInternal for PawnMoveGenerator {
 
     fn move_set_for_piece(
         position: &Position,
-        placed_piece: PlacedPiece,
+        placed_piece: &PlacedPiece,
         capture_mask: BitBoard,
         push_mask: BitBoard,
     ) -> MoveSet {
-        let capture_moves = Self::attacks(position, placed_piece) & capture_mask;
-        let quiet_moves = Self::pushes(position, placed_piece) & push_mask;
+        let capture_moves = Self::attacks(position, &placed_piece) & capture_mask;
+        let quiet_moves = Self::pushes(position, &placed_piece) & push_mask;
 
-        MoveSet::new(placed_piece)
+        MoveSet::new(*placed_piece)
             .quiet_moves(quiet_moves)
             .capture_moves(capture_moves)
     }
diff --git a/position/src/move_generator/queen.rs b/position/src/move_generator/queen.rs
index dc41769..0b8a571 100644
--- a/position/src/move_generator/queen.rs
+++ b/position/src/move_generator/queen.rs
@@ -14,7 +14,7 @@ impl MoveGeneratorInternal for ClassicalMoveGenerator {
 
     fn move_set_for_piece(
         position: &Position,
-        placed_piece: PlacedPiece,
+        placed_piece: &PlacedPiece,
         capture_mask: BitBoard,
         push_mask: BitBoard,
     ) -> MoveSet {
@@ -56,7 +56,7 @@ impl MoveGeneratorInternal for ClassicalMoveGenerator {
         let quiet_moves = all_moves & (empty_squares | !friendly_pieces) & push_mask;
         let capture_moves = all_moves & opposing_pieces & capture_mask;
 
-        MoveSet::new(placed_piece)
+        MoveSet::new(*placed_piece)
             .quiet_moves(quiet_moves)
             .capture_moves(capture_moves)
     }
diff --git a/position/src/move_generator/rook.rs b/position/src/move_generator/rook.rs
index 18129c8..8e9037a 100644
--- a/position/src/move_generator/rook.rs
+++ b/position/src/move_generator/rook.rs
@@ -14,7 +14,7 @@ impl MoveGeneratorInternal for ClassicalMoveGenerator {
 
     fn move_set_for_piece(
         position: &Position,
-        placed_piece: PlacedPiece,
+        placed_piece: &PlacedPiece,
         capture_mask: BitBoard,
         push_mask: BitBoard,
     ) -> MoveSet {
@@ -52,7 +52,7 @@ impl MoveGeneratorInternal for ClassicalMoveGenerator {
         let quiet_moves = all_moves & (empty_squares | !friendly_pieces) & capture_mask;
         let capture_moves = all_moves & opposing_pieces & push_mask;
 
-        MoveSet::new(placed_piece)
+        MoveSet::new(*placed_piece)
             .quiet_moves(quiet_moves)
             .capture_moves(capture_moves)
     }