Chess in 40 SecondsDon't Copy in the Petrov
Black to move. Kick it before you take back.
Snort took your pawn. Taking his back right away is the trap. Find a better move.
Hint
Attack the knight with a pawn first.
Answer
d6 — Correct! Kick the knight first, then take back on e4.
The tempting mistake
Copying him is the trap: after Qe2, the natural Nf6 loses your queen to Nc6+.
The idea
In the Petrov, kick the knight with d6 before taking on e4.
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.