White to move. Find the one move that wins. About 700 ELO.
Something valuable is undefended.
Check what every black piece is defended by.
An enemy piece is undefended. Take it for free.
After every opponent move, ask: what did they just leave unprotected?
Before every move, ask: what did my opponent just leave undefended? Free material wins more beginner games than anything else.
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.