The full results from the St Albans Chess Congress are now available:
This shows that Jessica Wen, whom I beat in the first round of the Intermediate, went on to win all four of her subsequent games and ended in joint third position (among five players on 4 points).
Here is the game: 1.Nf3 Nc6 2.d4 e6 3.Bf4 f5 (I hadn't encountered this Dutch Defence used against the London system before, but it looks to me like a dangerous weakening of the Black King position) 4.e3 Nf6 5.h3 b6 6.c3 Bb7 7.Nbd2 Ne7 8.Bd3 Ng6 9.Bg5 Be7 10.0-0 0-0 11.h4 (aiming for h5) Ng4 12.BxBe7 QxBe7 13.g3 h5? (weakening the Black King position further) 14.Ng5 e5? (a good move to aim for but premature here) 15.Qb3+ d5 (now the Black Bb7 is shut out of the attack) 16.e4! (using the pin on the Pd5) fxe4 17.Be4 Nf6? (overlooking that the attack is on the Ng6 not on d5) 18.BxNg6 Kh8 19.Rae1 e4 20.Ndf3 (using another pin) Ba6! (I missed that one) 21.c4? (expecting dxc4) Bxc4 22.Qd1 BxRf1 23.KxBf1 Nd7 24.Ne5 Nf6 25.Bxh5! (if NxBh5 Qxh5+ and mate) Kg8 26.Ng6 Qe8 27.Qe2 c5 28.Rd1 e3 29.Kg2 exf2? 30.Ne7+ QxNe7 31.QxQe7 NxBh5 32.Qe3 Rae8 33.Qc3 cxd4 34.Qd3 (threatening mate at h7) Nf6 35.Rf1 Ne4 36.Nf3 Rf6 37.Nd2 Kh8 38.Qxd4 a5 39.NxNe4 dxNe4 40.Rxf2 (the dangerous pawn falls at last!) Rfe6 41.Rf7 (threat of Qxg7 mate) Rg6 42.Qe3 Kg8 43.Rb7 Rd6 44.Qc3 Rg6 45.Qb3+ Kh8 46.Qf7! Ree6 47.h5 (at this point Black's flag fell at the end of the extra 15 minutes play, but the position is lost anyway). 1-0
An exciting game to play through again.