White has Black’s bishop pinned, this time on the d-file. Again the bishop is protected; indeed, it is protected twice. So White’s best bet is to attack the bishop with a pawn, as this would make the bishop’s protection irrelevant. White has a pawn ready to go on c4. The best way to advance a pawn is with threats that force the enemy to waste moves getting his pieces out of the way. Here the pawn can move to c5 with a threat to Black’s knight. After the knight moves, the pawn goes to c6 and takes the bishop a move later. (Or Black moves his king after White’s c4-c5, inviting White to take the knight on b6 instead.)

There's one loose end: the knot of pieces on e4-e5 and f4-f5. Black’s e5 pawn attacks White’s bishop, and White’s g4 pawn attacks Black’s knight. It would be a simple matter for White to exchange pieces here with Black, but should it be done before or after the pawn push toward the pinned bishop? Answer: before. It simplifies the rest of your plans afterwards, and it reduces the number of pieces on the board (which magnifies the edge you are about to obtain).