2 files changed, 10 insertions, 3 deletions
diff --git a/src/board/io.rs b/src/board/io.rs
index d27b856..15d7744 100644
--- a/src/board/io.rs
+++ b/src/board/io.rs
@@ -97,6 +97,7 @@ impl IO for Board {
             castling_rights: [[true; 2]; 2], // TODO: actualy parse from FEN
             ep_target: None, // TODO: parse from FEN
             clock: Clock::default(),
+            positions: Vec::new(),
             hash: 0,
             zobrist_seed: Board::seed(),
         };
diff --git a/src/board/mod.rs b/src/board/mod.rs
index 95d470a..50aa1b9 100644
--- a/src/board/mod.rs
+++ b/src/board/mod.rs
@@ -15,7 +15,7 @@ pub enum CastlingSide {
 
 /// Chess board is an main interface to the internal game state.
 /// Board defines rules of the game and manages players actions.
-#[derive(Debug, Clone, Copy, PartialEq)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct Board {
     pub ply: u16,
     pub piece_sets: [Bitboard; 12],
@@ -26,12 +26,16 @@ pub struct Board {
 
     pub clock: Clock,
 
+    /// List of all positions to determine repetitions
+    pub positions: Vec<u64>,
+
     // Computed values
     pub occupancy: Bitboard,
     /// Zobrist hash of the current position
     pub hash: u64,
     zobrist_seed: ZobristSeed,
 
+
     pub attacks: Attacks,
 }
 
@@ -227,6 +231,7 @@ impl Board {
 
         self.ply += 1;
         self.zobrist_toggle_color();
+        self.positions.push(self.hash);
 
         captured_piece
     }
@@ -320,6 +325,7 @@ impl Board {
         self.castling_rights = previous_castling_rights;
         self.hash = previous_hash;
         self.ply -= 1;
+        self.positions.pop();
     }
 
     pub fn is_square_attacked(&self, square: Square, attacker_color: Color) -> bool {
@@ -388,7 +394,7 @@ mod tests {
     fn make_move() {
         let fen = String::from("q1b2k2/5p1p/4p1pb/pPPp4/3N4/3nPB2/P2QKnR1/1R6 w - - 0 25");
         let mut board = Board::from_FEN(fen);
-        let initial_board = board;
+        let initial_board = board.clone();
         board.print();
 
         let black_move = Move { source: Square::F7, target: Square::F5, kind: MoveKind::Quiet };
@@ -429,7 +435,7 @@ mod tests {
     fn unmake_move() {
         let fen = String::from("q1b2k2/5p1p/4p1pb/pPPp4/3N4/3nPB2/P2QKnR1/1R6 w - - 0 25");
         let mut board = Board::from_FEN(fen);
-        let initial_board = board;
+        let initial_board = board.clone();
 
         let mov = Move { source: Square::D2, target: Square::A5, kind: MoveKind::Capture };