Solution
39. d7 ♚e7 40. d6+ ♚d8 41. ♝xb3
The position
This intermediate puzzle (rating 1600) asks White to move to find the winning idea. It features these themes: Discovered Attack.
It is White to move. Look for the tactic hiding in the position — Discovered Attack. Drag a piece on the board to play your move; the puzzle will tell you if you found the best continuation.
Take 50,000 puzzles anywhere
Get Chess Puzzles Trainer for iPhone and iPad — the same puzzles, offline, with progress tracking and spaced repetition.