There were also other differences compared to modern chess: Castling was not allowed (it was invented much later). Stalemating the opposing king resulted in a win for the player delivering stalemate. Capturing all one's opponent's pieces apart from the king (baring the king) was a win, unless the opponent could capture the last piece on their next move, which was considered a draw in most places in the Islamic world (except for Medina, where it was a win).
There were also other differences compared to modern chess Castling was not allowed (it was invented much later) Stalemating the opposing king resulted in a win for the player delivering stalemate Capturing all one's opponent's pieces apart from the king (baring the king) was a win unless the opponent could capture the last piece on their next move which was considered a draw in most places in the Islamic world (except for Medina where it was a win)