French Defense Reti Spielmann Attack Puzzle (Rated 900): Win Material — Decisive Middlegame Tactic

This puzzle is a classic middlegame example of winning material through tactical pressure on loose pieces. White’s active bishop and rook coordination create a direct threat against an undefended bishop, while the rook on the b-file also becomes relevant once the defender is removed. The key idea is that one tactical shot can force a sequence where Black’s active-looking pieces are actually overextended and vulnerable to simplification in White’s favor.