Allah forbids His believing servants from consuming Khamr and Maysir which is gambling. Ibn Abi Hatim recorded that `Ali bin Abi Talib, the Leader of the Faithful, said that chess is a type of gambling.
Ibn Abi Hatim recorded that `Ata', Mujahid and Tawus, or , two of them, said that every type of gambling, including children's playing with (a certain type of) nuts, is Maysir. Ibn `Umar said that Al-Maysir means gambling, and this is the same statement that Ad-Dahhak reported from Ibn `Abbas, who added, "They used to gamble during the time of Jahiliyyah, until Islam came. Allah then forbade them from this evil behavior.''
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