Answer: In the first diagram, the players are even, although Radjabov (white) has the bishop pair, which is considered to be an advantage on the grandmaster level.

In the second diagram, Ba6! exploits the pinned piece and creates the possibility of a passed pawn, a factor which won the game for Radjabov.

Right now, Anand is in the lead with 4 pts., followed by Aronian, Topalov, Radjabov, Shirov, Leko, Carlsen, and Ivanchuk. There have been many upsets in this tournament, and most suprisingly, Magnus Carlsen, an excellent player, has played unusually poorly thus far.