[Event "US Open-50"]
[Site "Omaha"]
[Date "1949.07.11"]
[Round "1"]
[White "Semb, Melvin"]
[Black "Shaffer, Joseph"]
[Result "0-1"]
[ECO "E20"]
[PlyCount "42"]
[EventDate "1949.07.11"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nh3 0-0 5. Bg5 c5 6. Bxf6 Qxf6 7. e3 Nc6 8. Bd3 cxd4 9. exd4 Qxd4 10. Bxh7+ Kxh7 11. Qh5+ Kg8 12. Ng5 Bxc3+ 13. bxc3 Qxc3+ 14. Kd1 Qd3+ 15. Kc1 Nd4 16. Qd1 Qxc4+ 17. Kd2 Qb4+ 18. Ke3 Nf5+ 19. Ke2 Qb5+ 20. Ke1 Qa5+ 21. Qd2 Qxd2+ 0-1

