Learn How to Win Material: Queen's Gambit Declined Fork
This middlegame puzzle comes from the Queen's Gambit Declined Exchange Variation and shows how a single forcing move can turn king safety into a material win. White's pieces look active, but the king in the center and the loose coordination around the back rank create tactical targets. The key idea is to use a check that also improves piece activity, forcing the defender into a passive square where another tactical hit wins material.