[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "1974.03.19"]
[Round "4"]
[White "Martinovsky, Eugene Simeon"]
[Black "Leidner, Michael I"]
[Result "1-0"]
[ECO "C48"]
[PlyCount "65"]
[EventDate "1974.03.??"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. Nc3 Nf6 5. 0-0 d6 6. d4 exd4 7. Nxd4 Bd7 8. Bxc6 bxc6 9. Bg5 0-0 10. Nb3 Bb4 11. Ne2 Be6 12. Ned4 Qe8 13. Bxf6 gxf6 14. Qf3 c5 15. Nxe6 fxe6 16. a3 c4 17. axb4 cxb3 18. Qxb3 Kh8 19. Qc3 Qg6 20. Rfe1 Rg8 21. g3 e5 22. Kg2 h5 23. h4 Rg7 24. Qf3 Rb8 25. c3 c5 26. bxc5 dxc5 27. Ra6 Rf7 28. Re2 Kg7 29. Rd2 Qh6 30. Qe2 Rfb7 31. Rc6 Qg6 32. Rxc5 Qf7 33. b4 1-0

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "7"]
[White "Leidner, Michael I"]
[Black "Burger, Karl"]
[Result "0-1"]
[ECO "E67"]
[PlyCount "78"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. c4 Nbd7 7. Nc3 e5 8. dxe5 dxe5 9. Qc2 Re8 10. Rd1 c6 11. b3 Qa5 12. a3 Nf8 13. b4 Qc7 14. h3 Nh5 15. Nd2 Ne6 16. e3 Ng5 17. Kh2 f5 18. Bb2 Be6 19. Rac1 Rad8 20. b5 e4 21. Ne2 c5 22. Bxg7 Qxg7 23. Nb3 b6 24. Ng1 Nf7 25. Bf1 Ne5 26. Be2 Nf6 27. Kg2 Qf7 28. Rd2 Rxd2 29. Nxd2 Rd8 30. f3 Bc8 31. fxe4 Bb7 32. Ngf3 Nxe4 33. Kh2 Qc7 34. Rg1 Nxd2 35. Nxd2 h5 36. h4 Qd6 37. Rd1 Ng4+ 38. Bxg4 hxg4 39. Qc3 Bf3 0-1

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "4"]
[White "Leidner, Michael I"]
[Black "Ocipoff, Nicholas"]
[Result "1-0"]
[ECO "A88"]
[PlyCount "41"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nf3 Nf6 5. 0-0 0-0 6. c4 d6 7. Nc3 c6 8. Qc2 Qc7 9. b3 e5 10. dxe5 dxe5 11. Rd1 Re8 12. Ba3 Na6 13. Bd6 Qa5 14. a3 e4 15. b4 Qb6 16. c5 Nxb4 17. axb4 Qxb4 18. Ra4 Qxa4 19. Qxa4 exf3 20. Bxf3 Ng4 21. Nd5 1-0

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "12"]
[White "Leidner, Michael I"]
[Black "Roubal, Richard R"]
[Result "1-0"]
[ECO "A47"]
[PlyCount "47"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. e3 e6 4. Bd3 Nc6 5. c3 b6 6. Nbd2 Be7 7. 0-0 Qc7 8. a3 Bb7 9. Re1 h5 10. e4 h4 11. h3 0-0-0 12. b4 Nh5 13. bxc5 bxc5 14. Qa4 Rdg8 15. Rb1 Nf4 16. Ba6 Bxa6 17. Qxa6+ Kd8 18. Nf1 g5 19. Rb7 Qc8 20. d5 exd5 21. Bxf4 gxf4 22. exd5 Nb8 23. Qxa7 Bd6 24. Qb6+ 1-0

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "5"]
[White "Saidy, Anthony Fred"]
[Black "Leidner, Michael I"]
[Result "1-0"]
[ECO "D57"]
[PlyCount "57"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Rd8 12. c4 dxc4 13. Bxc4 Nc6 14. Qc3 Bg4 15. 0-0 Bxf3 16. gxf3 Qf6 17. Be2 Qe6 18. Kh1 Ne7 19. Qxc7 Rac8 20. Qxb7 Nd5 21. Qb2 Nc3 22. Rfc1 Nxe2 23. Rxc8 Qxc8 24. Qxe2 Qc6 25. Rd1 Qf6 26. d5 g5 27. Kg2 Qe5 28. Qd2 Rd6 29. Qd4 1-0

