I knew this Nb6 move, i had seen it before played by Portisch!
In any case, it is a good psychological tactic for Anand to get a draw in the first game with black, having obtained a more tenacious position.
You are the first at this site to mention my countryman and great chess player Lajos Portisch.
Since in Hungarian the surname comes first and the first name second I can only say: long live Portisch Lajos!

I knew this Nb6 move, i had seen it before played by Portisch!
In any case, it is a good psychological tactic for Anand to get a draw in the first game with black, having obtained a more tenacious position.