[Event "American op 42nd"]
[Site "Los Angeles"]
[Date "2006.11.23"]
[Round "1"]
[White "Conrad, William"]
[Black "O'Brien, Michael"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "31"]
[EventDate "2006.11.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 115 Extra"]
[Source "ChessBase"]
[SourceDate "2007.01.10"]
[SourceVersion "1"]
[SourceVersionDate "2007.01.10"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. Be3 Nf6 5. h3 c6 6. Qd2 0-0 7. Bh6 Bxh6 8. Qxh6 b5 9. Bd3 Bb7 10. Nf3 Nbd7 11. e5 dxe5 12. dxe5 Nc5 13. Ng5 Nxd3+ 14. cxd3 Re8 15. 0-0 e6 16. Nce4 1-0

[Event "Fremont Weibel Quads1"]
[Site "Fremont"]
[Date "2001.08.11"]
[Round "3"]
[White "Ma, Timothy"]
[Black "O'Brien, Michael"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1467"]
[BlackElo "1673"]
[PlyCount "62"]
[EventDate "2001.08.11"]
[EventType "swiss"]
[EventRounds "3"]
[EventCountry "USA"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Be3 dxe4 4. Nd2 Nf6 5. f3 Nd5 6. Qe2 exf3 7. Ngxf3 Nxe3 8. Qxe3 Be7 9. Bd3 Nd7 10. 0-0-0 Nf6 11. h4 b6 12. Ne4 Bb7 13. Nxf6+ Bxf6 14. Be4 Bxe4 15. Qxe4 Qd5 16. Qf4 Qxa2 17. Qxc7 0-0 18. Qc3 Rac8 19. Qd3 Qa1+ 20. Kd2 Qxb2 21. Ng5 Qxd4 22. Kc1 Qb2+ 23. Kd2 Rxc2+ 24. Ke1 Bc3+ 25. Rd2 Qc1+ 26. Kf2 Rxd2+ 27. Qxd2 Qxd2+ 28. Kf3 Bd4 29. Ne4 Qe3+ 30. Kg4 f5+ 31. Kh5 g6# 0-1

[Event "IECC M email"]
[Site "IECC email"]
[Date "1996.??.??"]
[Round "?"]
[White "Dudley, Bruce"]
[Black "O'Brien, Michael"]
[Result "1-0"]
[ECO "C36"]
[PlyCount "43"]
[EventDate "1996.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[SourceTitle "Corr 2008"]
[Source "ChessBase"]
[SourceDate "2008.06.24"]
[SourceVersion "1"]
[SourceVersionDate "2008.06.24"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Bd6 5. d4 Nf6 6. c4 c5 7. dxc5 Bxc5 8. Qe2+ Qe7 9. Qxe7+ Bxe7 10. Bxf4 Ne4 11. Nbd2 Nxd2 12. Bxd2 Nd7 13. 0-0-0 0-0 14. Re1 Bf6 15. Bb4 Rd8 16. Bd3 Nf8 17. Be7 Bxe7 18. Rxe7 b6 19. Ne5 Bb7 20. Rxb7 f6 21. Nc6 Rd7 22. Rxd7 1-0

[Event "IECC Match email"]
[Site "IECC email"]
[Date "1996.??.??"]
[Round "?"]
[White "O'Brien, Michael"]
[Black "Dudley, Bruce"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "26"]
[EventDate "1996.??.??"]
[EventType "tourn (corr)"]
[EventRounds "6"]
[SourceTitle "Corr 2008"]
[Source "ChessBase"]
[SourceDate "2008.06.24"]
[SourceVersion "1"]
[SourceVersionDate "2008.06.24"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. Nc3 d6 6. 0-0 Bg4 7. Nd5 Nd4 8. Bg5 h6 9. Qd2 Nxf3+ 10. gxf3 hxg5 11. Nxf6+ Qxf6 12. fxg4 Qf3 13. Qd1 Qh3 0-1

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1992.??.??"]
[Round "2"]
[White "Brady, Stephen"]
[Black "O'Brien, Michael"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2320"]
[PlyCount "39"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 f5 2. Bg5 g6 3. Nc3 d5 4. e3 Bg7 5. h4 c6 6. Bd3 Be6 7. Nf3 Nd7 8. h5 Ngf6 9. Bf4 Qb6 10. h6 Bf8 11. Ng5 Bg8 12. Qd2 e6 13. 0-0-0 Qa5 14. f3 0-0-0 15. a3 Nh5 16. Kb1 Be7 17. Nb5 b6 18. Nd6+ Bxd6 19. Bxd6 Qxd2 20. Ba6# 1-0

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1992.??.??"]
[Round "4"]
[White "McElligott, Gerry"]
[Black "O'Brien, Michael"]
[Result "1/2-1/2"]
[ECO "A98"]
[PlyCount "55"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 d6 2. d4 f5 3. g3 e6 4. Bg2 Nf6 5. 0-0 Be7 6. c4 0-0 7. Nc3 Qe8 8. Qc2 Qg6 9. d5 e5 10. Nh4 Qh5 11. Bf3 Ng4 12. h3 g5 13. Nxf5 Bxf5 14. hxg4 Bxg4 15. Bxg4 Qxg4 16. Qe4 Qh5 17. Qh1 Qg4 18. Ne4 Qf5 19. f3 Qg6 20. g4 Nd7 21. Rf2 Nc5 22. Nxc5 dxc5 23. e4 Rf7 24. Be3 b6 25. Qh3 Raf8 26. Kg2 h6 27. Rh1 Rh7 28. Bd2 1/2-1/2

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1992.??.??"]
[Round "9"]
[White "O'Brien, Michael"]
[Black "Cummins, Hugh"]
[Result "1/2-1/2"]
[ECO "D11"]
[PlyCount "142"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. g3 d5 2. Bg2 Nf6 3. Nf3 c6 4. b3 Bf5 5. Bb2 Nbd7 6. c4 h6 7. 0-0 e6 8. d4 Bd6 9. Nbd2 0-0 10. Re1 Bh7 11. a3 Qe7 12. b4 Bc7 13. c5 e5 14. dxe5 Nxe5 15. Nxe5 Bxe5 16. Bxe5 Qxe5 17. Nf3 Qe7 18. Qd4 Rfe8 19. e3 Ne4 20. Nh4 Qe5 21. Qxe5 Rxe5 22. Nf3 Ree8 23. Nd4 Nf6 24. Rec1 a6 25. Rc3 Nd7 26. Bf1 Ne5 27. f3 Re7 28. Kf2 g5 29. Be2 Kg7 30. Rg1 Rae8 31. f4 Nd7 32. f5 Nf6 33. Bf3 g4 34. Bg2 Re5 35. Ke2 Bxf5 36. Ra1 Kg6 37. a4 Be4 38. Bf1 Bh1 39. Rca3 Ne4 40. Rc1 Ra8 41. Ke1 Ng5 42. Be2 h5 43. Rb3 Rae8 44. Kd2 Bf3 45. Bd3+ Be4 46. Be2 Ne6 47. b5 axb5 48. axb5 Nxd4 49. exd4 R5e6 50. bxc6 bxc6 51. Rb6 Bf5 52. Bd1 Kg7 53. Rc3 Re4 54. Rb4 Bg6 55. Ra3 R8e6 56. Ra2 Rf6 57. Kc1 Rf1 58. Rd2 Ree1 59. Rb6 Be4 60. Rxc6 Bf3 61. Rd6 Bxd1 62. Kb2 Bf3 63. c6 Rb1+ 64. Kc3 Be4 65. Re2 Rfc1+ 66. Kd2 Rc2+ 67. Ke3 Rb3+ 68. Kf2 Rcc3 69. Ra2 Rf3+ 70. Ke2 Bd3+ 71. Ke1 Rf1+ 1/2-1/2

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1992.??.??"]
[Round "5"]
[White "O'Brien, Michael"]
[Black "Deiseach, Donald"]
[Result "1-0"]
[ECO "D03"]
[PlyCount "89"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 d5 3. Bg5 Ne4 4. Bh4 Nd7 5. e3 c6 6. Bd3 Qb6 7. Qc1 Ndf6 8. Nbd2 h6 9. Bxf6 Nxd2 10. Be5 Nxf3+ 11. gxf3 Bh3 12. Rg1 0-0-0 13. Rg3 Bd7 14. Bxg7 Bxg7 15. Rxg7 Rdg8 16. Rg3 Rxg3 17. fxg3 h5 18. h4 f6 19. c3 e5 20. Qc2 Rg8 21. Kf2 Qc7 22. Rg1 c5 23. Bf5 cxd4 24. Bxd7+ Qxd7 25. exd4 Qe6 26. Qe2 Qf5 27. Kg2 Kb8 28. Kh2 e4 29. fxe4 dxe4 30. Rf1 Qg6 31. Qe3 a6 32. d5 f5 33. c4 b6 34. b4 Kb7 35. c5 b5 36. Rc1 Qg4 37. c6+ Kc7 38. Rc3 Kd6 39. Qc5+ Ke5 40. d6+ Kf6 41. Qe3 Ke6 42. d7 Qd1 43. Rc5 Qg4 44. c7 f4 45. d8Q 1-0

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1992.??.??"]
[Round "7"]
[White "O'Brien, Michael"]
[Black "Fox, Anthony"]
[Result "1/2-1/2"]
[ECO "D03"]
[PlyCount "81"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 d5 4. e3 Nbd7 5. Bd3 Be7 6. Nbd2 c5 7. c3 0-0 8. 0-0 h6 9. Bh4 b6 10. Ne5 Nxe5 11. dxe5 Nd7 12. Bg3 f5 13. f4 Bb7 14. Qe2 a6 15. a4 Kh7 16. Be1 g6 17. h3 Qc8 18. Nf3 a5 19. Bh4 Bxh4 20. Nxh4 Ba6 21. c4 Bb7 22. b3 Qd8 23. g3 Qe7 24. Rad1 Rad8 25. Kh2 Nb8 26. Rg1 Nc6 27. Nf3 Nb4 28. cxd5 Nxd5 29. Rc1 Nb4 30. Bc4 Rd7 31. g4 Rfd8 32. gxf5 exf5 33. Qg2 Rd2 34. Be2 Kh8 35. Rce1 Rg8 36. Qg3 Bxf3 37. Qxf3 Qe6 38. Rg2 Nc2 39. Rb1 Rgd8 40. Bc4 Qe8 41. Rbg1 1/2-1/2

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1992.??.??"]
[Round "3"]
[White "O'Brien, Michael"]
[Black "Hurley, John"]
[Result "1/2-1/2"]
[ECO "A06"]
[PlyCount "56"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 d5 2. b3 Nf6 3. Bb2 Bf5 4. e3 e6 5. d3 Nbd7 6. Nbd2 Be7 7. Be2 h6 8. 0-0 0-0 9. Nh4 Bh7 10. f4 Ne8 11. Nhf3 Nd6 12. Qe1 Bf6 13. Ne5 Nf5 14. Bg4 Nxe5 15. fxe5 Bh4 16. Qe2 Bg5 17. Bxf5 Bxf5 18. g3 c5 19. Rf2 d4 20. e4 Bg6 21. Rg2 Be3+ 22. Kh1 Bxd2 23. Qxd2 Qc7 24. Qf4 Kh7 25. Rf1 f5 26. exf6 Qxf4 27. gxf4 gxf6 28. c3 f5 1/2-1/2

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1992.??.??"]
[Round "1"]
[White "O'Brien, Michael"]
[Black "Hynes, Kilian A"]
[Result "1/2-1/2"]
[ECO "E03"]
[BlackElo "2245"]
[PlyCount "54"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 a6 7. d4 b5 8. Qc2 Bb7 9. 0-0 c5 10. a4 Rc8 11. axb5 axb5 12. Qb3 b4 13. dxc5 Bxc5 14. Nbd2 0-0 15. Qd3 Ra8 16. Rxa8 Qxa8 17. Nb3 Be7 18. Nh4 Rc8 19. Bxb7 Qxb7 20. Rd1 h6 21. Ng2 Ne5 22. Qb1 Qc7 23. Ne3 Nfg4 24. Nxg4 Nxg4 25. Qe4 Nf6 26. Qf3 e5 27. Qf5 Rd8 1/2-1/2

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1992.??.??"]
[Round "8"]
[White "Palmer, Bernard"]
[Black "O'Brien, Michael"]
[Result "1/2-1/2"]
[ECO "B10"]
[PlyCount "31"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 c6 2. e4 e5 3. Nc3 Bb4 4. Qg4 Qf6 5. Nf3 Na6 6. Qg3 d6 7. d3 Bxc3+ 8. bxc3 Qg6 9. Ba3 Qxg3 10. hxg3 c5 11. Be2 Ne7 12. Nh4 Bd7 13. g4 0-0-0 14. Nf5 Nxf5 15. gxf5 f6 16. 0-0-0 1/2-1/2

[Event "IRL-ch"]
[Site "Dublin"]
[Date "1992.??.??"]
[Round "6"]
[White "Ryan, Joseph"]
[Black "O'Brien, Michael"]
[Result "1-0"]
[ECO "A55"]
[WhiteElo "2300"]
[PlyCount "49"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c6 2. c4 e5 3. Nf3 d6 4. d4 Nd7 5. Nc3 Ngf6 6. Be2 Be7 7. 0-0 0-0 8. Rb1 a5 9. d5 c5 10. a3 h6 11. Qc2 Nh7 12. b4 axb4 13. axb4 Bg5 14. Nxg5 hxg5 15. Bg4 Nb6 16. bxc5 Nxc4 17. Be2 Na3 18. Bxa3 Rxa3 19. Nb5 Ra6 20. Nxd6 Rxd6 21. cxd6 Qxd6 22. Rfc1 g4 23. Qc7 Qf6 24. d6 Qe6 25. Bc4 1-0

[Event "IRL-ch"]
[Site "Cork"]
[Date "1982.07.15"]
[Round "6.4"]
[White "Ludgate, Alan Templeton"]
[Black "O'Brien, Michael"]
[Result "0-1"]
[ECO "A96"]
[WhiteElo "2220"]
[PlyCount "54"]
[EventDate "1982.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "IRL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. 0-0 0-0 6. b3 d6 7. Bb2 Qe8 8. d4 Nbd7 9. Nbd2 Bd8 10. Qc2 e5 11. Qxf5 e4 12. Qb5 exf3 13. Bxf3 c6 14. Qb4 d5 15. Qc3 Qg6 16. Rae1 Ne4 17. Nxe4 dxe4 18. Bg2 Nf6 19. d5 cxd5 20. cxd5 Bd7 21. Rd1 Rc8 22. Qd2 Bb6 23. a4 e3 24. Qb4 exf2+ 25. Kh1 Rc2 26. Bxf6 Qxf6 27. a5 Bc5 0-1

[Event "Mulcahy op"]
[Site "Mulcahy"]
[Date "1974.??.??"]
[Round "3"]
[White "Gibson, John F"]
[Black "O'Brien, Michael"]
[Result "1/2-1/2"]
[ECO "A04"]
[PlyCount "39"]
[EventDate "1974.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d3 g6 2. g3 Bg7 3. Bg2 c5 4. Nf3 Nc6 5. 0-0 e6 6. e4 Nge7 7. Re1 d6 8. Nbd2 b5 9. a4 Rb8 10. axb5 Rxb5 11. Nc4 Bb7 12. Bf4 e5 13. Bd2 0-0 14. c3 Qc7 15. Qc1 Na5 16. Nxa5 Rxa5 17. Qc2 Rb8 18. Bg5 Nc6 19. Nd2 Bc8 20. Nc4 1/2-1/2

[Event "Mulcahy op"]
[Site "Mulcahy"]
[Date "1974.??.??"]
[Round "5"]
[White "Kennedy, John Richard"]
[Black "O'Brien, Michael"]
[Result "0-1"]
[ECO "D84"]
[PlyCount "52"]
[EventDate "1974.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "IRL"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 0-0 6. cxd5 Nxd5 7. Nxd5 Qxd5 8. Bxc7 Na6 9. Bg3 Bf5 10. Bxa6 Qxg2 11. Qf3 Be4 12. Qxg2 Bxg2 13. Bxb7 Bxb7 14. f3 Rac8 15. Kd2 Rfd8 16. Rc1 Rxc1 17. Kxc1 Bh6 18. Bf2 Rxd4 19. Kc2 Rc4+ 20. Kb1 Ba6 21. Ne2 Bb7 22. Ng1 Rc7 23. h4 Ba6 24. Nh3 Bd3+ 25. Ka1 Rc2 26. Rd1 Bf5 0-1

