1. e4 e5 2. Nf3 d6 3. d4 f5 4. Nc3
Tony Kosten writes that "this may be White's best."
4... fxe4
5. Nxe4
Kosten actually gives this a "?!" dubious mark, writng "Theory, but not best, in my opinion."
6. Ng3 e4 7. Ne5 Nf6 8. f3 Keres 8... Bd6! West 9. fxe4 
6... dxe4 7. Qh5+ g6 8. Nxg6 Nf6
Kosten actually gives this move a double question mark, "??" meaning immediately losing! That just shows you how unsettled the theory of this line still is! West, meanwhile, refutes Kosten's recommendation thus: 8... hxg6? 9. Qxg6+! Kd7 10. Qf5+ Ke8 11. Qe5+ Be6 12. Qxe6+! Qe7 13. Qc8+
West
I unfortunately only have the first edition of West's book, published by Chess Enterprises in 1994, so I don't know the correct line after 10. Nxh8+ Kg7 11. Bg5 when West gives 11... Nc6 12. Bxf6+ Qxf6 13. Qxf6+ Kxf6 14. Bc4 Nxd4 15. 
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21. Bd3+
No doubt he has since come up with an improvement.
Threatening immediate mate by 12.Qg5# and scary ideas like 12.Nh5+.
b) 11. Bh6+ Kxh6 12. Nxh8 Bb4+ 13. c3 Qxh8 14. cxb4 Keres 14... Qf8 15. h4! Kg7
16.
O-O-O (16. Qxc7+ Nbd7 17. a3 Kh8 18.O-O Qh6Song-West, Somerset 1993
11... h6 12. Be6! Bb4+ 13. c3 Nc6 14. Qf5
14. Nh5+ Kf8 15. Qxf6+ Qxf6 16. Nxf6 Bxe6 17. cxb4 Nxb4!=
West has been down this road before: the best try for White is 15. Bxc8 Rxc8 16. cxb4 Nxb4! 17. )
17... Nc2 18. Rb1 Nxd4
as played in Leiggi-West, Somerset 1997.
15... Bd6
Fritz
Suffcient is 16... Rxc8
but West wants more and is not afraid of insane complications.
White may be for choice after 19. Qb5! Qxa8 20. Qxb2
19... Ba3
19... Bxc3 20. Bxc6 Qxc6 21. Rfc1 Qd5!
20. Rb3 Bd6 21. Bb7 Ne7 22. Qa5 Qg6
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The insane opening stage is finally over. Now the real game begins! No doubt most of West's opponents have usually used up almost all of their clock by this point.
In this position, the two Knights versus Rook and two pawns create an imbalance that should result in someone gaining an edge. But it's easy to believe in Black: the extra piece gives him a potentially unstoppable attacking force on the kingside, especially given the open lines!
Black's forces are converging on the kingside in a threatening way.
25. d5 Rg8 26. d6 cxd6 27. c6 Kh8
27... Bxh2+! 28. Kxh2 Kh8 29. g3 Qh5+ 30. Kg2 Nh4+ 31. Kg1 Qxa5
28. Rg3
28... Nxg3 29. hxg3 e3! 30. Qxa7 e2 31. Re1
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31. Ra1 Qe4 32. Re1 Qb4 is no better.
31... Bd2 32. Rxe2 Qb1+ 33. Kh2 Ng4+ 34. Kh3 Qh1#
A beautiful conlusion to an amazingly complicated attacking game.
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