3 files changed, 40 insertions, 15 deletions
diff --git a/src/bitboards.cpp b/src/bitboards.cpp
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/bitboards.cpp
diff --git a/src/bitboards.hpp b/src/bitboards.hpp
new file mode 100644
index 0000000..7288f8a
--- /dev/null
+++ b/src/bitboards.hpp
@@ -0,0 +1,40 @@
+#ifndef SRC_BITBOARDS_H_
+#define SRC_BITBOARDS_H_
+
+#include "board/board.hpp"
+#include <cstdint>
+#include <unordered_map>
+
+struct BitBoards {
+  uint64_t whitePawns;
+  uint64_t whiteKnights;
+  uint64_t whiteBishops;
+  uint64_t whiteRooks;
+  uint64_t whiteQueens;
+  uint64_t whiteKing;
+
+  uint64_t blackPawns;
+  uint64_t blackKnights;
+  uint64_t blackBishops;
+  uint64_t blackRooks;
+  uint64_t blackQueens;
+  uint64_t blackKing;
+};
+struct UndoMoveBitboards {
+  BitBoards board;
+
+  bool oldTurn;
+  bool oldCanEnpassant;
+  Position oldEnPassant;
+
+  bool OldWhiteCastleKing;
+  bool OldWhiteCastleQueen;
+  bool OldBlackCastleKing;
+  bool OldBlackCastleQueen;
+
+  int oldHalfMoveClock;
+  int oldMoveClock;
+  uint64_t ZobristKey;
+  GameState oldState;
+};
+#endif /* SRC_BITBOARDS_H_ */
diff --git a/src/board/board.hpp b/src/board/board.hpp
index b35773d..0b92798 100644
--- a/src/board/board.hpp
+++ b/src/board/board.hpp
@@ -36,21 +36,6 @@ struct TranspositionsEntry {
   int depth;
   int Eval;
 };
-struct BitBoards {
-  uint64_t whitePawns;
-  uint64_t whiteKnights;
-  uint64_t whiteBishops;
-  uint64_t whiteRooks;
-  uint64_t whiteQueens;
-  uint64_t whiteKing;
-
-  uint64_t blackPawns;
-  uint64_t blackKnights;
-  uint64_t blackBishops;
-  uint64_t blackRooks;
-  uint64_t blackQueens;
-  uint64_t blackKing;
-};
 struct Game {
   Piece pieces[64];
   bool turn = true; // 1 white; 0 black