Chess in 40 SecondsThe Rubinstein Trap
White to move. Grab the pawn.
Snort thinks his center pawn is safe. Take it.
Hint
The d5 pawn looks protected. Take it with the knight anyway.
Answer
Nxd5 — Nxd5! If cxd5, Bc7 traps the queen.
The idea
A protected pawn can still be taken when taking back loses the queen. Look for Bc7.
This chess trap 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.