Beat From's Gambit
White to move. Stop the queen check.
Snort's bishop and queen are aiming at your king. One move stops it.
Hint
His queen wants h4. Cover that square.
Answer
Nf3 — Correct! Now his queen can't check from h4.
The tempting mistake
That's the trap: Qh4+, g3, Qxg3+ and his bishop mates on g3.
The idea
With your f-pawn gone, the h4-e1 diagonal is open. Close it first.
This defense is one of 41 quick puzzles in the Chess in 40 Seconds trainer: find the move on the board, get a hint if you're stuck, and learn the idea so you never fall for it in your own games.