This messes up White's kingside protective pawns, and is the source of later trouble. I think Don was expecting me to take the knight on d7 immediately, as in: [17...Rxd7
18.gxf3 Rxd7 19.Ba6 Rcd8 20.Bb5 Rd5 21.h4 Rh5 22.Qe4 Bf6 23.Kf1 Rxh4? In my eagerness to implement my obvious idea I missed the killing: [23...Qh2 ]
24.f4 Ng5 25.Qg2 Ne6 26.Ba1 Ng7 27.Bd3 Qb8 28.Be4 and now is the time for mass exchanges on d4.
28...cxd4 29.Bxd4 Bxd4 30.Rxd4 Rxd4 31.exd4 Rxf4 This is what I saw on move 28. What I did not see came after Don played:
32.Bb7 The threat is clearly Rc8+. I spent a good 10 minutes on this position, finally playing just about the weakest continuation. But there is a miracle save, when Black actually increases his advantange. What is it? A great tactic, that surpasses the powers of a pair of class B players.
32...Qf8?? 33.Rc8 Ne8 34.Qc6 Rf6 35.Qa4 b5 36.Qxb5 Rb6 37.Qa4 Rxb7 38.Rxe8 Qxe8 39.Qxe8+ Kg7 40.b4 Rc7 41.Qb8 Rd7 42.Qe5+ f6 43.Qe3 Kf7 44.Qc3 Kf8 45.Qc8+ 1-0