Dodge the Lasker Trap
White to move. Don't push your e-pawn.
Snort's pawn on d4 is begging to be hit. Don't fall for it.
Hint
Develop a piece instead. The d4 pawn isn't going anywhere.
Answer
Nf3 — Correct! Develop first. The d4 pawn will be a target later.
The tempting mistake
That's the trap: Bb4+ and his pawn breaks through to f2 and promotes.
The idea
Hitting a pawn can open lines for the enemy bishop. Develop 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.