How Vas collected a rare GM scalp on ICC

What do you do when your wife goes out to sing karaoke with her girlfriends? Well, you ignore the kids and hang out on ICC (www.chessclub.com) in the 3 0 randomized pool. That's where most of the titled players hangout. So stay patient and enjoy the free lessons. I lost on time to Cuban GM Frank de la Paz, took out one WIM and IM Alfonso Almeida. 

I ended my evening session with a rare GM scalp against GM agokoy.

Exercise: Look at the final position and try to find mate quickly because time is ticking. This was a 3 0 game.

Final position. WHITE TO MOVE. Find all of the possible mates.

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[Event "ICC 3 0"]
[Site "Internet Chess Club"]
[Date "2018.12.30"]
[Round "?"]
[White "(GM) agokoy"]
[Black "(NCM) Vas Sladek"]
[Result "0-1"]
[ECO "A12"]
[PlyCount "78"]
[EventDate "2018.??.??"]
1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bg4 5. d3 Nbd7 6. Nbd2 e6 7. b3 Be7 8. Bb2
O-O 9. c4 Rc8 10. Rc1 b6 11. a3 c5 12. Qc2 d4 13. b4 e5 14. b5 Bf5 15. Ng5 h6
16. Nge4 Nxe4 17. Nxe4 Bg6 18. a4 f5 19. Nd2 Bf6 20. a5 Qe7 21. axb6 axb6 22.
Ra1 Rfe8 23. Ra7 e4 24. Kh1 Qe6 25. Rfa1 Bg5 26. Nf1 f4 27. gxf4 Bxf4 28. Ng3
Bxg3 29. hxg3 Rf8 30. Kg1 Qf5 31. f4 e3 32. Qd1 Qg4 33. Qe1 Nf6 34. Re7 Nh5 35.
Raa7 Rce8 36. Reb7 Nxg3 37. Rxg7+ Kh8 38. Bf3 Nxe2+ 39. Kh2 Qxf4+ 0-1