[Event "US Open-62"]
[Site "San Francisco"]
[Date "1961.08.14"]
[Round "1"]
[White "McMahon, George"]
[Black "Rivise, Irving"]
[Result "1/2-1/2"]
[ECO "E24"]
[PlyCount "81"]
[EventDate "1961.08.14"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. Nf3 Nc6 7. Bg5 h6 8. Bf4 Qa5 9. Bd2 d6 10. e3 0-0 11. Bd3 e5 12. e4 Bg4 13. d5 Ne7 14. h3 Bd7 15. 0-0 Ng6 16. Qc1 Kh7 17. g4 Qd8 18. Nh2 Ng8 19. f4 Qh4 20. Kg2 Qe7 21. Nf3 Kh8 22. Kg3 exf4+ 23. Bxf4 Nf6 24. Qe3 Ne5 25. Rae1 b6 26. Bxe5 dxe5 27. Nh4 Ne8 28. Nf5 Qg5 29. h4 Qxe3+ 30. Rxe3 f6 31. Ref3 Kh7 32. h5 Rb8 33. Be2 Bxf5 34. gxf5 Nd6 35. Re3 Rb7 36. Kf3 a6 37. a4 Rfb8 38. Rb1 Kg8 39. Bd3 Kf8 40. Re2 Ke8 41. Reb2 1/2-1/2

[Event "US Open-56"]
[Site "Long Beach"]
[Date "1955.08.08"]
[Round "1"]
[White "Kaufman, Allen J"]
[Black "McMahon, George"]
[Result "1-0"]
[ECO "C18"]
[PlyCount "49"]
[EventDate "1955.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 cxd4 6. axb4 dxc3 7. Qg4 Ne7 8. Qxg7 Rg8 9. Qxh7 Qc7 10. Nf3 Nbc6 11. Bb5 cxb2 12. Bxb2 Rxg2 13. 0-0-0 a6 14. Ba4 b5 15. Bb3 Bb7 16. h4 Nf5 17. Qh8+ Kd7 18. Qf6 Rf8 19. Bxd5 Rg6 20. Bxe6+ Ke8 21. Qxf5 Rxe6 22. Rd6 Nxe5 23. Bxe5 Rxd6 24. Bxd6 Qxd6 25. Re1+ 1-0

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.21"]
[Round "10"]
[White "Persinger, Louis"]
[Black "McMahon, George"]
[Result "1-0"]
[ECO "C01"]
[PlyCount "65"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Nf6 5. Nf3 Be7 6. 0-0 0-0 7. c3 Nc6 8. Qc2 h6 9. h3 Bd6 10. Be3 Be6 11. Nbd2 Qd7 12. Nh4 Ne7 13. f4 Bxh3 14. gxh3 Qxh3 15. Ndf3 Ng4 16. Qg2 Qxg2+ 17. Nxg2 Nxe3 18. Nxe3 Bxf4 19. Ng2 Bd6 20. Rae1 g5 21. Ne5 Rad8 22. Rf6 Kg7 23. Ref1 Bxe5 24. dxe5 Rde8 25. Ne3 Ng8 26. Nf5+ Kh8 27. Nxh6 Nxh6 28. Rxh6+ Kg7 29. Rh7+ Kg8 30. Rf6 Rxe5 31. Rfh6 Ree8 32. Bf5 Rd8 33. Rh5 1-0

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.18"]
[Round "8"]
[White "McMahon, George"]
[Black "Goldberg, Norman J"]
[Result "0-1"]
[ECO "A10"]
[PlyCount "44"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. c4 f5 2. Nc3 Nf6 3. g3 e6 4. Bg2 Be7 5. d3 0-0 6. Nf3 d6 7. 0-0 Qe8 8. Be3 Qh5 9. h3 Nc6 10. b4 Nxb4 11. Nd4 e5 12. Ndb5 f4 13. gxf4 Bxh3 14. Bxh3 Qxh3 15. f3 Qg3+ 16. Kh1 exf4 17. Bf2 Qh3+ 18. Kg1 Nh5 19. Ne4 Ng3 20. Nxg3 fxg3 21. Bxg3 Qxg3+ 22. Kh1 Rf5 0-1

[Event "Pan American-ch02"]
[Site "Los Angeles"]
[Date "1954.07.15"]
[Round "5"]
[White "Smith, Philip D"]
[Black "McMahon, George"]
[Result "1-0"]
[ECO "C18"]
[PlyCount "61"]
[EventDate "1954.07.10"]
[EventType "swiss"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 cxd4 6. axb4 dxc3 7. Qg4 g6 8. bxc3 Nc6 9. f4 Qc7 10. Bd2 Nh6 11. Qg5 Nf5 12. g4 Ng7 13. Qh6 0-0 14. Nf3 f5 15. exf6 Rxf6 16. Ng5 Ne8 17. b5 Nd8 18. b6 Qg7 19. Qxg7+ Kxg7 20. Rxa7 Rxa7 21. bxa7 Nc7 22. Bb5 h6 23. Nf3 Nc6 24. Bxc6 bxc6 25. 0-0 Na8 26. Rb1 Rf8 27. Rb8 Ba6 28. Nd4 Kf7 29. Nxe6 Re8 30. Nd8+ Rxd8 31. Rxd8 1-0

