London System · Line 19 of 19
vs 1...d5 2...Nf6 3...e6
A sharper cousin of the London: knight to c3 before Bf4. The knight jumps to b5 to hit c7, and Black's usual answer ...Na6 puts a knight on the rim. Trade it off and Black is left with broken queenside pawns.
As always.
Pawn to d4.