[Event "US Open-74"]
[Site "Chicago"]
[Date "1973.??.??"]
[Round "4"]
[White "Willert, V."]
[Black "Day, Lawrence A"]
[Result "1-0"]
[ECO "B23"]
[PlyCount "42"]
[EventDate "1973.08.12"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. f4 Nc6 4. Nf3 a6 5. Be2 b5 6. 0-0 Bb7 7. d3 Be7 8. Qe1 b4 9. Nd1 Nf6 10. Qg3 0-0 11. f5 exf5 12. exf5 Nh5 13. Qh3 g6 14. Bh6 Kh8 15. Bxf8 Nf4 16. Qh6 Nxe2+ 17. Kh1 Bxf8 18. Qd2 Ned4 19. Nxd4 cxd4 20. c3 Qh4 21. Re1 Bh6 1-0

