Defensive Move Advanced Puzzle (Rated 696): Defend — Rook Rescue
This middlegame illustrates the value of a defensive move when material is already favorable but one piece is dangerously restricted. White has extra material, yet the rook near the king is vulnerable to an active bishop and cannot freely escape. The correct defensive idea preserves the rook, maintains king safety, and keeps the material advantage intact. Strong chess is not always about attacking; sometimes the most powerful move quietly solves an immediate tactical problem before improving the position.