Lichess Game of the Month March - Contest

I played this in a rated Russian Game tournament. Does it still count?

Beautiful Promotion Mate where the piece that checkmates the king is not the promoting piece.

Beautiful game , sacrificed 2 pieces for attack with a forced mate following after a few moves

Aquí va la meva

All pieces in the attack :)

One mistake is all I need to win a closed position. Even in 1 minute bullet.



Disclaimer: The engine will always claim I'm making a mistake with f6. I don't care. I almost always play this opening because it serves a specific purpose: it gets people out of line, it encourages reckless play from the other opponent, it draws out games to grueling time crunches, and encourages closed positions. Converting closed positions with piece shuffling to punish the smallest of mistakes is my forte.

Beautiful King's Indian, barely a mistake by White and still gets ran over

Pretty happy with this one, though the attack is admittedly rather schematic. Pawn, Knight, Rook and Bishop are sacrificed, followed by checkmate. I'd like to point out some beautiful computer analysis: After 18. Rg1 Black has two more resilient defences: 18... Bf6 and 18... Bg4 19. Rxg4 Bf6. The different placement of the white Rook leads to different only-move-refutations:
18... Bf6 19. Qf4! Re8 20. Bf8! Re1+ 21. Rxe1 Qxf8 22. Qxf6+ Qg7 23. Qxf3+-
18... Bg4 19. Rxg4 Bf6 20. Bf4!! Rg8 21. Be5! Rxg4 22. Qh6+ Kg8 23. Bh7+ Kh8 24. Bg6+ Kg8 25. Qh7+ Kf8 26. Qxf7#

Rook sacrifice in complicated sicilian middle game.