Al-Adli al-Rumi (), was an Arab player and theoretician of

Shatranj Shatranj (, ; from Middle Persian ) is an old form of chess, as played in the Sasanian Empire. Its origins lie in the South Asian game of chaturanga. Modern chess gradually developed from this game, as it was introduced to Europe by contacts in ...

, an ancient form of chess from

Persia Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...

. Originally from

Anatolia Anatolia (), also known as Asia Minor, is a peninsula in West Asia that makes up the majority of the land area of Turkey. It is the westernmost protrusion of Asia and is geographically bounded by the Mediterranean Sea to the south, the Aegean ...

, he authored one of the first treatises on Shatranj in 842, called ''Kitab ash-shatranj'' ('Book of Chess'). He was recognized as the best Shatranj player in the 9th century during the reign of

al-Wathiq Abū Jaʿfar Hārūn ibn Muḥammad al-Wathiq bi'Llah (; 18 April 81210 August 847), commonly known by his regnal name al-Wathiq bi'Llah (), was an Abbasid caliph who reigned from 842 until his death in 847. Al-Wathiq is described in the so ...

until his loss to al-Razi, just before or early into the reign of

al-Mutawakkil Ja'far ibn al-Mu'tasim, Muḥammad ibn Harun al-Rashid, Hārūn al-Mutawakkil ʿalā Allāh (); March 82211 December 861, commonly known by his laqab, regnal name al-Mutawwakil ala Allah (), was the tenth Abbasid Caliphate, Abbasid caliph, rul ...

. In his treatise al-Adli compiled the ideas of his predecessors on Shatranj. The book was lost but the problems he discussed survived in the works of successors. Mansūbāt were end game scenarios, where victory was obtained either by

checkmate Checkmate (often shortened to mate) is any game position in chess and other chess-like games in which a player's king is in check (threatened with ) and there is no possible escape. Checkmating the opponent wins the game. In chess, the king is ...

stalemate Stalemate is a situation in chess where the player whose turn it is to move is not in check and has no legal move. Stalemate results in a draw. During the endgame, stalemate is a resource that can enable the player with the inferior position ...

, or by baring the opposing king. From his work came a variant of the Dilaram problem, attributed to al-Suli and called Dilaram checkmate. In a manuscript from the early 15th century, a similar problem was accompanied by the story of a figure named Dilaram, who was the favourite slave of a certain chess player reduced to a desperate position in a match.

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References

{{Authority control Chess theoreticians History of chess 9th-century Arab people 9th-century Arabic-language writers 9th-century people from the Abbasid Caliphate Shatranj players