Le Quang Liem grabbed the sole lead at the Masters section of the Prague Chess Festival after beating Saleh Salem in Tuesday’s sixth round. Pentala Harikrishna is in sole second place a half point back. In the Challengers, former sole leader Vincent Keymer was held to a draw by Marcin Krzyzanowski, which allowed Nodirbek Abdusattorov to climb to the shared lead thanks to a win over Max Warmerdam. | Photo: Petr Vrabec