Simple Chess AI / Random Piece

To Play Chess Game,
1.Choose color
2.Choose difficulty levels (1-10)
3.Choose Piece mode (normal / random)
4.Play Chess Game!

In Play Screen
[Retry] Retry a game
[Revert] Revert last move
[Flip] Flip the board
[Record] See game record
[Hint] Get suggestion of move

Notice:
- Special Chess Rules for Castling and En Passant are handled.
You can castle when you move king onto rook.
- Pawn promotions are handled ,but it auto-promotes to queen.