The 12th round of London-hosted Candidates Tournament would have ended in a draw, had Armenian grandmaster Levon Aronian not made the decisive mistake with 50.g6.

“What did he do? He secured a win for Vladimir Kramnik,” candidates2013.com quoted English grandmaster Jon Speelman as saying.

“I myself don’t understand why I took the move. First I managed to make a draw, then I made a simple mistake and don’t know how I lost to Kramnik. That’s really strange,” Aronian said.