public static long getPawnZobristKey(Board board) {
		long zobristKey = 0L;

		for (int index = 0; index < 120; index++) {
			if ((index & 0x88) == 0) {
				int piece = board.boardArray[index];

				if (piece == W_PAWN) // White piece
				{
					zobristKey ^= PIECES[Math.abs(piece) - 1][0][index];
				} else if (piece == B_PAWN) // Black piece
				{
					zobristKey ^= PIECES[Math.abs(piece) - 1][1][index];
				}
			} else
				index += 7;

		}

		return zobristKey;
	}