SAN JOSE -- The Chicago Blackhawks trail the San Jose Sharks 2-0 after the first period at the HP Pavilion.

San Jose scored twice on the power play as the Hawks gave up shooting lanes, creating rebound chances during the ensuing chaos. Michael Frolik took a four-minute high-sticking penalty that led to the first man-advantage score then a scrum near the benches gave the Sharks a second power play.

The Hawks were called for three roughing penalties while San Jose sent two men to the box on the play. On both goals, Marian Hossa failed to get in front of point shots and Justin Braun and Dan Boyle capitalized.

The Hawks missed on three power-play chances of their own as Antti Niemi made seven saves in the period. Corey Crawford stopped 10 of 12.