Move representation

Chess.sol

contract Chess {
  /// ======================================Move Representation=======================================
  /// Each move is allocated 12 bits. The first 6 bits are the index the piece is moving from, and the
  /// last 6 bits are the index the piece is moving to. Since the index representing a square is at
  /// most 54, 6 bits sufficiently represents any index (0b111111 = 63 > 54). e.g. 1243 denotes a move
  /// from index 19 to 27 (1243 = (19 << 6) | 27).
}