[Event "Bad Lauterberg"]
[Site "Bad Lauterberg FRG"]
[Date "1977.03.15"]
[EventDate "1977.03.06"]
[Round "9"]
[Result "1-0"]
[White "Raymond Keene"]
[Black "Klaus Wockenfuss"]
[ECO "A22"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "39"]

1. c4 { Notes by Raymond Keene. } e5 2. Nc3 Nf6 3. Nf3 e4 {!?}
4. Ng5 b5 {This gambit, invented by the Spanish Grandmaster
Bellon, can give Black tremendous counterplay if White takes
the pawn.} 5. d3 {I prefer this to acceptance of the pawn.}
5...bxc4 6. dxe4 Nc6 {If 6...h6 7 Nxf7! Kxf7 8 e5 +/-.} 7. e3
Bb4 8. Bxc4 O-O 9. O-O Bxc3 {? Premature. Correct is 9...h6!}
10. bxc3 h6 11. f4 {!! A brilliant piece sacrifice, originally
suggested by Michael Stean. This was the first game in which
it was tested. No Black player risked reaching this position
thereafter.} 11...hxg5 12. fxg5 Nh7 13. g6 Ng5 {Or 13...Nf6 14
Rxf6 Qxf6 15 Qh5+-.} 14. Ba3 Ne5 15. Bxf8 Nxc4 16. gxf7+ {If
now 16...Nxf7 17 Rxf7! Kxf7 18 Qd5+ Ke8 19 Qg8, or 18...Kg6 19
Rf1, finally 18...Kxf8 19 Rf1+ Ke7 20 Qg5+ Ke8 21 Qg6++-.}
16...Kxf8 17. Qh5 Bb7 18. Qh8+ Ke7 19. Qxg7 Qf8 20. Qf6# 1-0