diff --git a/src/lib/chess/types.ts b/src/lib/chess/types.ts
index 5acc114..4db0114 100644
--- a/src/lib/chess/types.ts
+++ b/src/lib/chess/types.ts
@@ -1,6 +1,33 @@
 import { Game } from "./game";
 export type GameListener = (board: Game) => void;
 
+export enum MoveFlag {
+  NORMAL = 0,
+  PAWN_DOUBLE = 1,
+  EN_PASSANT = 2,
+  CASTLE_KING = 3,
+  CASTLE_QUEEN = 4,
+  PROMOTION = 5,
+  CAPTURE = 6,
+  CAPTURE_PROMOTE = 7,
+}
+
+export enum Promotion {
+  QUEEN = 0,
+  ROOK = 1,
+  BISHOP = 2,
+  KNIGHT = 3,
+}
+
+export enum Capture {
+  NONE = 0,
+  PAWN = 1,
+  KNIGHT = 2,
+  BISHOP = 3,
+  ROOK = 4,
+  QUEEN = 5,
+}
+
 export enum Piece {
   // bit 0-2: piece type (0-6)
   EMPTY = 0,