Chess set dating back more than 1,000 years to go under the hammer
A chess set which is more than 1,000 years old and worth an estimated £20-30,000 is being sold at auction.
The 10th century set forms part of a collection of rare artefacts from the ancient game which is expected to sell for a total of £73,800-£117,000.
Sotheby's said the collection carries "huge significance" in the evolution of the game throughout Persia and the Middle East.
The pieces belonged to German chess grandmaster Lothar Schmid who is famed for refereeing what is known as the Match Of The Century - the 1972 Cold War face-off between American Bobby Fischer and Boris Spassky of the Soviet Union.
The items will be sold as part of the Sotheby's Arts of the Islamic World auction in London on April 20.