Noah's Ark Trap
Black to move. Trap the bishop.
Snort grabbed a free pawn with his queen. Spring the trap.
Hint
Kick the queen with a pawn. Then look at White's bishop.
Answer
c5 — c5! The queen must run, then c4 traps the bishop on b3.
The idea
A bishop on b3 can get boxed in by pawns. Kick the queen, then shut the door with c4.
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.