[Event "Cambridge Springs Trap"] [White ""] [Black ""] [Site ""] [Round ""] [Annotator ""] [Result "*"] [Date ""] [PlyCount "18"] 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 {A common move order for Black which is flexible.} 5. cxd5 exd5 6. Nxd5 {This natural move trying to take advantage of the pinned knight on f6 is a mistake. The refutation has been played in many games!} Nxd5 $1 7. Bxd8 Bb4+ {The point - White must block with the queen.} 8. Qd2 Bxd2+ 9. Kxd2 Kxd8 {And Black has won a piece.} *