White to move. Find the one move that wins. About 600 ELO.
Your pawn is one step from becoming a queen.
What happens when a pawn reaches the last rank?
A pawn reaching the last rank becomes a new piece, almost always a queen.
Count how many moves your passed pawn needs and whether anything can stop it.
Passed pawns must be pushed. A pawn on the 7th is worth almost a whole piece.
Solve it on the board above, or take a hint. Every ChessLvl puzzle is checked by a chess engine to have exactly one best move.