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

Shatranj Shatranj ( ar, شطرنج; fa, شترنج; from Middle Persian ''chatrang'' ) is an old form of chess, as played in the Sasanian Empire. Its origins are in the Indian game of chaturaṅga. Modern chess gradually developed from this game, as i ...

, an ancient form of chess from

Persia Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...

. Originally from

Anatolia Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The re ...

, 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 ( ar, أبو جعفر هارون بن محمد المعتصم; 17 April 812 – 10 August 847), better known by his regnal name al-Wāthiq bi’llāh (, ), was an Abbasid caliph who reigned from 842 until 84 ...

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

al-Mutawakkil Abū al-Faḍl Jaʿfar ibn Muḥammad al-Muʿtaṣim bi-ʾllāh ( ar, جعفر بن محمد المعتصم بالله; March 822 – 11 December 861), better known by his regnal name Al-Mutawakkil ʿalā Allāh (, "He who relies on God") was ...

. 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 the game of 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 infer ...

, 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 Arabs 9th-century Arabic writers 9th-century people from the Abbasid Caliphate Shatranj players