World champion Viswanathan Anand was in for a rude shock as he lost to Hikaru Nakamura of the United States in the fourth round of the Norway Chess 2013 Super tournament in Bryne.While Sergey Karjakin of Russia remained on the path of creating history after he scored a victory over Levon Aronian of Armenia, Anand blundered his way from a level position and the concern about his white results remained. Out of the three white games so far in the tournament, the Indian has scored one win, one loss and one draw to keep it on an even keel.Anand's challenger in the next world championship, Magnus Carlsen, yet again was held to a draw by Peter Svidler of Russia leaving the spectators wondering whether there will be a catch-up scenario with Karjakin.