Indian chess ace Dronavalli Harika could not break through the defences of lower-rated German Elisabeth Paehtz in the 10th round to slip to joint third with 6.5 points in the FIDE Women’s Grand Swiss chess tournament here.

Harika was up against Paahtz on the second board in a Alapin Variation of the Sicilian. The Indian GM got a promising endgame but missed her chance to put the German to a serious test.