[Event "US Open-67"]
[Site "Seattle"]
[Date "1966.08.25"]
[Round "12"]
[White "Dahlberg, Ivars A"]
[Black "Sobczyk, Eugene"]
[Result "1-0"]
[ECO "D80"]
[PlyCount "69"]
[EventDate "1966.08.14"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "USA"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. cxd5 Nxc3 6. bxc3 Qxd5 7. Nf3 Qa5 8. Qd2 c5 9. e3 Bg7 10. Be2 Nc6 11. 0-0 0-0 12. Rab1 Rd8 13. Rfc1 Qc7 14. a4 h6 15. Bh4 Bf5 16. Rb5 b6 17. Qa2 Be6 18. Qa3 cxd4 19. cxd4 Qd7 20. Rb2 Rac8 21. Rbc2 g5 22. Bg3 g4 23. Bb5 gxf3 24. Bxc6 Rxc6 25. Rxc6 Bd5 26. Rc7 Qg4 27. Qxe7 Rf8 28. Rxa7 fxg2 29. Qd6 Be6 30. Rac7 h5 31. d5 Bf5 32. Qf4 Qg6 33. d6 Rd8 34. e4 Bh3 35. Qh4 1-0

[Event "US Open-67"]
[Site "Seattle"]
[Date "1966.08.23"]
[Round "10"]
[White "LeCompte, George"]
[Black "Sobczyk, Eugene"]
[Result "0-1"]
[ECO "D82"]
[PlyCount "72"]
[EventDate "1966.08.14"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "USA"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. Qa4+ Nc6 6. Nb5 0-0 7. Nxc7 Nh5 8. Nxd5 Nxf4 9. Nxf4 Qxd4 10. Nd3 Ne5 11. Nf3 Nxd3+ 12. exd3 Qxb2 13. Rd1 Qc3+ 14. Nd2 Bf5 15. Qb3 Rad8 16. Qxc3 Bxc3 17. Be2 Bxd3 18. Bxd3 Rxd3 19. Ke2 Rfd8 20. Ne4 Rxd1 21. Rxd1 Rxd1 22. Kxd1 Bd4 23. f3 h6 24. Kd2 f5 25. Kd3 Bg1 26. Nc3 Bxh2 27. Kd4 Kf7 28. Kc5 h5 29. Nb5 h4 30. Kb4 Bb8 31. c5 a6 32. c6 bxc6 33. Nd4 c5+ 34. Kxc5 Ba7+ 35. Kc4 Bxd4 36. Kxd4 g5 0-1

[Event "US Open-67"]
[Site "Seattle"]
[Date "1966.08.23"]
[Round "11"]
[White "Sobczyk, Eugene"]
[Black "Hickey, Patrick"]
[Result "1-0"]
[ECO "C71"]
[PlyCount "85"]
[EventDate "1966.08.14"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "USA"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d3 Bd7 6. Bb3 Be7 7. c3 Nf6 8. Nbd2 b5 9. Nf1 Na5 10. Bc2 c6 11. Ng3 Nb7 12. d4 Qc7 13. 0-0 0-0 14. h3 c5 15. d5 c4 16. Be3 Nc5 17. Nh2 Ne8 18. f4 f6 19. f5 Rb8 20. Rf3 a5 21. Nh5 b4 22. Rg3 b3 23. axb3 Nxb3 24. Rb1 Kh8 25. Ng4 Bc8 26. Bh6 Bd8 27. Nxg7 Nxg7 28. Ne3 Rg8 29. Qg4 Ba6 30. Kh2 Qf7 31. Qh4 Nh5 32. Rxg8+ Kxg8 33. Rf1 Bb6 34. Bd1 Ng7 35. Rf3 Bxe3 36. Rxe3 Kh8 37. Rg3 Rg8 38. Be3 Ne8 39. Bh5 Qe7 40. Rxg8+ Kxg8 41. Bxe8 Qxe8 42. Qxf6 Qd7 43. Bh6 1-0

[Event "US Open-67"]
[Site "Seattle"]
[Date "1966.08.18"]
[Round "5"]
[White "Kaltenecker, Joseph"]
[Black "Sobczyk, Eugene"]
[Result "1/2-1/2"]
[ECO "B40"]
[PlyCount "101"]
[EventDate "1966.08.14"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "USA"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Bd3 Nc6 7. Nf3 d5 8. exd5 Nxd5 9. Bd2 Nxc3 10. bxc3 Be7 11. 0-0 0-0 12. Qe2 Bf6 13. Qe4 g6 14. a4 Qd5 15. Rab1 a6 16. Rfe1 Kg7 17. h3 Rd8 18. g4 Qxe4 19. Rxe4 h6 20. Kg2 Ne7 21. c4 Bd7 22. a5 Bc6 23. Re2 Rd7 24. Kg3 Bxf3 25. Kxf3 Nc6 26. Kg2 Ne5 27. Bc3 Nxd3 28. Bxf6+ Kxf6 29. cxd3 Rxd3 30. Rxb7 Ra3 31. c5 Rxa5 32. Rc2 Rc8 33. c6 Rb5 34. Rxb5 axb5 35. Rb2 Rxc6 36. Rxb5 Rc3 37. h4 g5 38. hxg5+ hxg5 39. f3 Rc4 40. Ra5 Rd4 41. Kf2 Kg6 42. Ra6 Kf6 43. Ra5 Rb4 44. Rc5 Rd4 45. Ra5 Rd5 46. Ra7 Re5 47. Kg3 Kg6 48. Ra8 Re2 49. Ra6 Kg7 50. Ra7 Kg6 51. Ra6 1/2-1/2

