The fancy move

Sometimes you can confuse your opponent with a fancy move.

Me! - Asetaminofen46 https://lichess.org/TLFBulka/white#37

1.e4 c5

2.Nf3 d6

3.Bb5+ Nc6 (In this game on strategy, Black preferred 3...Nd7. https://marcoferrante.wixsite.com/chess/post/a-bit-of-strategy)

4.0-0 Nf6

5.e5!? (less populat than 5.Re1, but positionally sound and fairly forcing).

5...dxe5

6.Nxe5 Bd7

7.Nxc6 bxc6

8.Bc4 e6

After compromising Black's pawn structure, White has obtained a small but safe advantage. Moreover, the light-square bishop in d7 looks miserable.

9.b3 Bd6

10.Bb2 Qc7

11.h3 Nd5

12.Nc3 0-0

Both players kept developing their pieces. If I were Black, I would have probably castled towards the queenside and tried to prepare Rhg5-g5 to create counterplay. Now, White can enjoy his positional superiority, but a few more pieces need to join the game.

13.Re1 Be7

14.Qg4 Nf6

Black had to react to the threat on g7.

15.Qf3 Rad8

16.Ne4 Nxe4

17.Rxe4 Bd6

A player can rarely bring a rook on the 4th rank. However, when possible, this gives enormous attack potential. Can you spot the fancy move?

...

...

...

...

...

18.Qf6!

The move is not a forcing mate, but it is rather shocking and in fact, my opponent could not react correctly (18...e5, but White keeps a great advantage and attacking potential).

18...gxf6?

This allows checkmate.

19.Rg4 Kh8

20.Bxf6#

1-0