Originally posted by: "Wulebgr"
29.f6+ is not possible, but I suspect you meant 30.f6+ which was tempting during the game, and was a line that I examined. It would have been an error to play this move, as the pawn can no longer be defended and Black is in no hurry to capture.

One possibility: 30.f6+ Ke6 31.Rxd7 Rxd7 32.Rxd7 Kxd7 and the king is in the square of the f-pawn. It can promote, but the king then grabs the queen. Meanwhile, both kings are equal distance from the vulnerable pawn on e5. We again reach a zugzwang-type position where White can force the Black king to move, but Black has three squares from which to defend the e-pawn. White has but one square from which to attack. The White king must give way, and Black wins.

Originally posted by: "Wulebgr"
I was playing for a draw in order to finish the tournament without a loss. After we repeated a position, my opponent played a pawn break that rendered the draw less likely. Exact calculation of the pawn endgame prior to swapping the last set of rooks brought an unexpected result, second place in the tournament, and $250.

[Event "20th Dave Collyer"]
[Site "Spokane"]
[Date "2012.02.26"]
[Round "5"]
[White "Wulebgr"]
[Black "Expert"]
[Result "1-0"]
[ECO "C76"]
[WhiteElo "1879"]
[BlackElo "2076"]
[PlyCount "75"]
[EventDate "2012.02.25"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]

[[1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. c3 a6 5. Ba4 d6 6. d4 Bd7 7. Bg5 f6 8. Be3 Nh6 9. dxe5 Nxe5 10. Nxe5 dxe5 11. h3 Nf7 12. Qxd7+ Qxd7 13. Bxd7+ Kxd7 14. Nd2 Bh6 15. Bxh6 Nxh6 16. Nc4 Rad8 17. O-O-O+ Ke6 18. Kc2 Nf7 19. Ne3 Nd6 20. f3 Rd7 21. Rd3 Rhd8 22. Rhd1 c6 23. b3 Ke7 24. R1d2 Ke6 25. Rd1 f5 26. exf5+ gxf5 27. g4 f4 28. Nf5 Nxf5 29. gxf5+ Ke7 30. Rxd7+ Rxd7 31. Rxd7+ Kxd7 32. Kd3 Ke7 33. h4 Kf6 34. Ke4 h5 35. b4 b6 36. c4 a5 37. bxa5 bxa5 38. c5 1-0]]