Win in 6 moves in Caro kann defense

If you are a beginner you have wondered that Can I finish a game in opening or not and in Caro kann defense when black gets a good position you can ruin his position.Let us see how.

[Site "Chess.com"]

[Result "1-0"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Qe2 Nbd7 6. Nd6# 1-0 is a beautiful smothered checkmate