White to move. Find the one move that wins. About 1200 ELO.
Move one piece, attack with another.
The bishop on b2 is aimed at h8. Move the knight out of its way, with check.
Move one piece out of the way so another piece behind it attacks. Two threats in one move.
Find your own pieces lined up behind each other, aimed at something valuable.
A discovered attack lets two pieces attack at once. When the moving piece gives check, the opponent can't save both.
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.