Indian maestro Viswanathan Anand's campaign at the Norway Chess tournament suffered a setback after losing to Azerbaijan's Shakhriyar Mamedyarov in the ninth round even as Norwegian star Magnus Carlsen shot into sole lead with a win over Frenchman Maxime Vachier-Lagrave.

Viswanathan Anand showed impressive form with a victory over Carlsen to lead the standings after the fifth round but was outgunned by Mamedyarov in 22 moves in the Classical match in a Petroff Millenium Attack game late on Thursday.