Solution
39. ♞f3+ ♞xf3 40. ♚xf3 d5 41. cxd5
The position
This advanced puzzle (rating 1840) asks White to move to find the winning idea. It features these themes: Knight Endgame.
It is White to move. Look for the tactic hiding in the position — Knight Endgame. 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.