Chess great Kasparov to come out of retirement for US c'ship

Former Russian chess champion Garry Kasparov is set to come out of retirement to play in a US tournament next month. Kasparov, who retired from professional chess in 2005, will compete against nine top players at the Sinquefield Cup in Missouri. Magnus Carlsen and Hikaru Nakamura, the current world number one and seven respectively, will also play in the tournament.