London System Other Variations Intermezzo in Chess

In the London System other variations intermezzo, White keeps the characteristic London setup (typically pawns on d4/e3 with the bishop on f4 or d3) but inserts an intermezzo—an in-between move—before completing the next “main” plan. The defining idea is that the intermezzo forces Black to respond to a new threat or concession, changing the timing of Black’s counterplay.