1. d4 e6 2. Nf3 f5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. c4 d6 7. Nc3 a5 8. Bg5 Ne4?!

8... Nbd7 is theory's preference and on this occasion I think it may be right!

9. Bxe7 Qxe7 10. Rc1 Nxc3 11. Rxc3 Rd8 12. c5 Nc6!?

12... dxc5? 13. Rxc5 Nc6 14. e3+/-

12... d5!?+/=

13. cxd6 cxd6

13... Rxd6?! 14. Qc1!?+/-

14. d5 Nb4!

14... exd5 15. Nd4!+/-

15. dxe6 Nxa2 16. Re3 Nb4 17. Nd4 g6

17... Rf8?!

18. f4!

We both believed that without this f4/g4 plan Black would have been OK.

18... Rf8 19. Qd2!?

19. g4 was my original intention. 19... fxg4 20. f5 Qg5?! felt a bit messy, but in fact(20... d5!?) 21. Qb3 is very strong.

19... Rf6

19... d5 20. g4 fxg4 21. f5+/-

19... h5!? 20. Rc1+/-

20. g4

20. Ra1 d5! (20... Bxe6? 21. Qxb4 axb4 22. Rxa8+ Kg7 23. Bd5+-)

20... fxg4

20... Bxe6 21. g5

21. f5 Nc6?!

Objectively this increases White's advantage, but it does offer the most practical swindling chances and Marcus has a very acute eye for such counter-play.

21... d5 22. Rc3! gxf5 (22... Na2 23. Rg3) 23. Nxf5 Qxe6 24. Qg5+ Rg6 25. Qd8+ Kf7 26. Nh6+ Kg7 27. Qf8#

22. Bxc6 bxc6 23. Nxc6 Qe8 24. Qxd6

24. Qd4 Qxc6 25. Qxf6 Bb7 26. Qf7+ Kh8 27. Kf2 is also winning, but I was trying to find a way to do it where my king could sit tight and feel secure.

24... Bb7

24... Ra6 25. Ne7+ Kh8 26. Qc7 (26. Nxc8?? Rxd6 27. Nxd6 Qe7)

25. Ne7+ Kh8

25... Kg7 26. Rc3+- (26. Qc7!? Qb8 27. Qd7)

26. Rc3

26. Qc7!?

26... Qb5

26... Ra6 27. Qe5 Qxe7 28. Rc7 is crushing too

27. Qd4! Raf8 28. Nxg6+ hxg6 29. e7 Kg8 30. exf8=Q+ Rxf8 31. Rc7 Rf7 32. Rxf7 Kxf7 33. fxg6+ Kxg6 34. Qf6+ Kh7 35. Qf7+ 1-0 [Peter Wells]