Blackmar-Diemer Gambit Declined: Lamb Defense

About this opening

The Lamb Defense (4.f3 Nc6) declines the capture to develop the queen's knight and pressure d4. Black aims for active piece play and control of the center, while keeping the option to return or hold the pawn depending on what follows. It is a natural, flexible reply to the declined Blackmar-Diemer, favoring development over the race for material.