[Event "USA-ch"]
[Site "Mentor"]
[Date "1977.09.30"]
[Round "6"]
[White "Grefe, John Alan"]
[Black "Matera, Salvatore Joseph"]
[Result "1/2-1/2"]
[WhiteElo "2425"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 O-O 8. Rc1 Nc6 9. cxd5 exd5 10. a3 Bxc3+ 11. Rxc3 Qd6 12. Be2 Ne7 13. b4 a6 14. O-O Bg4 15. h3 Bxf3 16. Bxf3 c6 17. Qb3 Rfb8 18. a4 Kh8 19. Rfc1 Kg8 20. Rc5 Ra7 21. g3 Rd8 22. Kg2 Re8 23. R5c3 Rd8 24. Qb1 Nc8 25. b5 axb5 26. axb5 Ne7 27. Qd3 Rda8 28. Bd1 Ra3 29. Bb3 Qb4 30. bxc6 bxc6 31. Rb1 Kf8 32. Qc2 g6 33. Rd3 Ra1 34. Rdd1 Rxb1 35. Rxb1 Qa3 36. h4 Rb8 37. h5 gxh5 38. Ba2 Rxb1 39. Bxb1 Qd6 40. Qe2 h4 41. gxh4 Qf6 42. Qg4 Ng6 43. h5 Ne7 44. Kg3 Qd6+ 45. Qf4 Nc8 46. Bf5 Qxf4+ 47. Kxf4 Nb6 48. e4 Ke7 49. e5 Na4 50. Bc8 c5 51. dxc5 Nxc5 52. Ke3 1/2-1/2