Preventing a knight move to g5. Now White has a problem with the d5-pawn.
Unity Chess Club
Peptan - Vukic Ljubljana 1997 Black to move
1...Nxc3 2.bxc3
By means of a tactical trick Black manages to exchange pieces, thus neutralizing the enemy attack.
White’s compensation for the pawn consists in his control of the square e5, and his pressure on the open files and the long diagonal. In one move, Black changes the character of the struggle.