A bit of a bluff?

 The current Gungahlin Chess Club tournament, the Korda Classic, ended in a tie for 1st between Miles Patterson and Riley Byng. However, the last round games saw both games decided by an element of bluffing. In Riley's game he had been outplayed in the middlegame, but in a lost ending he saw a chance for a swindle. However, when it arrived on the board, he realised it didn't work, due to a miscounting of pawn moves. However, his opponent made the same mistake in counting the pawn moves, and chose a losing line.

In the Patterson game, he was well on top when his opponent played a surprising queen sacrifice. As he had not considered this possibility, he had to carefully check the follow up moves. In doing so he realised that he had a little tactic at the end which kept his advantage, which was enough to win the game.

Patterson,Miles - Raichura,Dev [D34]
Korda Classic (7), 12.09.2023

1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 c5 5. cxd5 exd5 6. d4 Nc6 7. O-O Be7 8. Nc3 O-O 9. Bg5 h6 10. Bxf6 Bxf6 11. dxc5 Be6 12. Qc1 Ne5 13. Rd1 Nc4 14. Nd2 Qa5 15. Nxd5 Bxd5 16. Nxc4 Bxc4 17. Qxc4 Bxb2 18. Rab1 Ba3 19. Bxb7 Rad8 20. c6 Qb6 21. Rxb6 Rxd1+ 22. Kg2 axb6 23. Qb3 Rd2 24. Qxa3 Rxe2 25. Qxf8+ Kxf8 26. c7 Rc2 27. c8Q+ Rxc8 28. Bxc8 Ke7 29. Kf3 Kd6 30. Ke4 Kc5 31. a4 Kb4 32. Bd7 g6 33. f4 f5+ 34. Kd4 g5 35. fxg5 hxg5 36. h4 f4 37. hxg5 fxg3 38. Ke3 g2 39. Kf2 g1Q+ 40. Kxg1 1-0