I was white, with a position that came from a Scandinavian transposed into a Blackmar-Diemer gambit. After black's Kc8, white wins by force - in post mortem analysis the engine gives a mate in 13.
16. Qd2 b6 (black cannot protect the mating square on d8 and has to create a place to flee. But it won't work ) 17. Ncxe4 (setting up a deadly battery - black can only delay the inevitable, and chooses to end it quickly) Ne8 18. Qd8+ Kb7 19. Nc5# (double check and mate).
I was white in a Grand Prix attack against the Sicilian - and after having sacrificed my queen's knight, the rook is now joining in. I could not calculate the whole line, but I was pretty sure that it was winning. Indeed the engine rates this position as +11.9 pawn equivalents for white.
17. Rxf6 Kxf6 (mate in 7 - but the position after the best move h6 is also completely lost) 18. Rf1+ Kxg6 19. Qxh7+ (another knight sac for good measure) Kxg5 20. h4+ Kg4 21. Qg7+ Kxh4 22. Rf4+ (quicker is Qh6+, but I saw the forced mate in this line) Kh5 23. g4+ Kh4 24. Qh6+ Kg3 25. Qh2 #.
Another Grand Prix attack, I had sacrificed a piece for some pawns and chances against the black king. According to the computer, white is a bit better, but black needs to be careful. He wasn't.
23. Nd5 Bd4 (tempting but suicidal - Bg5 was the only reasonable move) 24. Ne7#
I was white in a Ponziani that was mishandled by black. Already a few pawns up and with black's king in an awkward position, the end came soon.
21. ... Re8 (Bb8 would have allowed black to continue to fight - now the knight delivers mate on the centre of the board) 22. Nxd5#
This was such a short game (Caro-Kann) that I post it completely:
1. e4 c6 2. Nf3 d5 3. Nc3 e6 4. d4 c5 5. Be3 cxd4 6. Nxd4 Bc5 7. Be2 Nf6 8. Nxe6 Bxe6 9. Bxc5 Qa5+ 10. b4 Qa3 11. Nxd5 Nxe4 Black misplayed the opening and is lost even if white did not have mate in one: 12. Nc7#
I was black in an Alekhine's defense. I played g5 and white took the bait:
14. Bxg5 Bxg5 15. Nxg5 Qxd4+ 16. Qxd4 Nxd4 17. Nxf7 and now the unexpected riposte that wins immediately: 0-0! 18. Ng5 Ne2+ 19. Kh1 Rxf1#
I was black in a London game (via an attempted Benoni). White looks a bit more comfortable, but the position was about equal, until the ill-timed push f4. I saw the killing rook sacrifice within seconds:
34. ... Rxg4+ and white resigned. The rook is untouchable because of Qg2#, and white's position crumbles. The post mortem engine analysis even shows a forced mate in seven moves.
