[Event "US Open-73"]
[Site "Atlantic City"]
[Date "1972.??.??"]
[Round "8"]
[White "Priesinger, F."]
[Black "Costa, Marcos"]
[Result "1/2-1/2"]
[ECO "A26"]
[PlyCount "95"]
[EventDate "1972.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 0-0 5. 0-0 d6 6. Nc3 e5 7. d3 Nc6 8. Rb1 Nh5 9. b4 f5 10. b5 Ne7 11. Qb3 Kh8 12. a4 f4 13. a5 h6 14. Ba3 Be6 15. Nd2 Rb8 16. b6 axb6 17. axb6 c6 18. Nde4 Nc8 19. Qb4 c5 20. Qb3 Nf6 21. Nxf6 Qxf6 22. Ne4 Qf5 23. f3 fxg3 24. hxg3 Qf7 25. Kf2 Kg8 26. Rh1 g5 27. Bc1 Qg6 28. Be3 Bf5 29. Qc2 Ne7 30. Ra1 Nc6 31. Ke1 Qe6 32. Nc3 Nb4 33. Qb3 Qd7 34. Kd2 Ra8 35. Ne4 Qe7 36. Ra3 Ra6 37. Rxa6 Nxa6 38. Bh3 Bxh3 39. Rxh3 Ra8 40. Qb5 Nb8 41. Rh2 Nc6 42. Qb2 Qd8 43. Rh1 Nb4 44. Ra1 Rb8 45. Ra4 Qxb6 46. Kd1 Qc7 47. Qa3 Bf8 48. Ra8 1/2-1/2

