The Reunion Radio 4, 11.15am

Kirsty Wark (right) chats to the boffins who created computer software capable of beating Garry Kasparov at his own game. They’re joined on the programme by members of the chess grand master’s entourage for an in-depth discussion of what happened when the two sides clashed in 1997.

Rachael Stirling reads the second of Tiffany Murray’s Hulda’s Cafe (Radio 4, 7.45pm) stories. This time, Hulda takes in a refugee who can ‘speak’ to birds.

In Slow Radio: Fair Winds (Radio 3, 11pm) producer Helen Needham and musician and composer Inge Thomson record the sounds they hear during an exploration of Fair Isle.