Grob Opening Keene Defense Puzzle (Rated 1282): Win Material — Fork Tactic
This middlegame puzzle is a classic example of tactical punishment against loose pieces. White’s active bishop and queen coordinate to create a forcing sequence that wins material by exploiting a pinned defender and an overloaded back rank. The key idea is not a direct attack on the king alone, but a combination of checks, captures, and a fork that leaves Black’s major pieces vulnerable. In practical classical chess, these patterns often decide games when one side’s pieces are poorly coordinated.