[Event "California State-ch"]
[Site "Atascadero"]
[Date "1949.09.06"]
[Round "6"]
[White "Croy, George"]
[Black "Jonas, Clark"]
[Result "1-0"]
[ECO "C17"]
[PlyCount "15"]
[EventDate "1949.09.01"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2 a6 6. dxc5 Nc6 7. Qg4 Nxe5 8. Qxb4 1-0

[Event "California State-ch"]
[Site "Atascadero"]
[Date "1949.09.05"]
[Round "5"]
[White "Jonas, Clark"]
[Black "Boyette, Leslie"]
[Result "0-1"]
[ECO "A46"]
[PlyCount "30"]
[EventDate "1949.09.01"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. g3 c5 4. c3 e6 5. Bg5 Nc6 6. Bg2 Qb6 7. Bxf6 Qxb2 8. Bg5 Qxa1 9. Qc2 cxd4 10. 0-0 Bd7 11. Nfd2 Na5 12. Nb3 Nxb3 13. Qxb3 Rc8 14. Bd2 a5 15. e3 a4 0-1

[Event "California State-ch"]
[Site "Atascadero"]
[Date "1949.09.04"]
[Round "4"]
[White "Rivise, Irving"]
[Black "Jonas, Clark"]
[Result "1-0"]
[ECO "C86"]
[PlyCount "87"]
[EventDate "1949.09.01"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Qe2 b5 7. Bb3 d6 8. a4 Rb8 9. axb5 axb5 10. c3 Be6 11. Bxe6 fxe6 12. d4 exd4 13. cxd4 0-0 14. Nbd2 d5 15. e5 Nd7 16. Nb3 Qc8 17. Bg5 Rxf3 18. Qxf3 Bxg5 19. Qg4 Ndxe5 20. Qxg5 Nf7 21. Qc1 Qd7 22. Ra6 Nfd8 23. Qf4 Qe7 24. Na5 e5 25. Nxc6 Nxc6 26. dxe5 Nxe5 27. Qf5 Rf8 28. Re6 Rxf5 29. Rxe7 Nc4 30. Rxc7 Nxb2 31. Rb1 Re5 32. Rc2 Nc4 33. f4 Re4 34. Rxb5 Rxf4 35. Rxd5 h6 36. h3 Kh7 37. Rd7 Ne5 38. Re7 Nf7 39. Rcc7 Kg6 40. Kh2 h5 41. g3 Rf2+ 42. Kg1 Rf6 43. Kg2 Rf5 44. h4 1-0

[Event "California State-ch"]
[Site "Atascadero"]
[Date "1949.09.03"]
[Round "3"]
[White "Jonas, Clark"]
[Black "Cross, James"]
[Result "0-1"]
[ECO "A13"]
[PlyCount "106"]
[EventDate "1949.09.01"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. g3 e6 4. c4 c6 5. Bg2 Bd6 6. 0-0 Nbd7 7. b3 0-0 8. Ba3 Bxa3 9. Nxa3 Qa5 10. Nc2 dxc4 11. bxc4 e5 12. e3 Qc3 13. Nd2 Nb6 14. c5 Nbd5 15. e4 Ne7 16. dxe5 Ng4 17. Nb3 Be6 18. Qd2 Qxe5 19. Qd6 Ng6 20. f4 Qc3 21. Qd2 Qxd2 22. Nxd2 Rad8 23. Rfd1 Ne7 24. h3 Nf6 25. Ne3 Rd3 26. Kf2 Rfd8 27. Nb3 Rxd1 28. Rxd1 Rxd1 29. Nxd1 Nd7 30. Nc1 f6 31. Ke3 Nxc5 32. Kd4 Nd7 33. Nc3 Nc8 34. Na4 b6 35. Nc3 Kf8 36. Nd3 Nd6 37. Ke3 Nc4+ 38. Ke2 Ke7 39. e5 fxe5 40. Bxc6 exf4 41. Nxf4 Bf5 42. g4 Bc2 43. Bxd7 Kxd7 44. Nh5 g5 45. Nf6+ Ke6 46. Nfe4 h6 47. Nd2 Nxd2 48. Kxd2 Bg6 49. Nb5 a5 50. Ke3 Ke5 51. a3 Be4 52. Nd4 Kd5 53. Ne2 Bg2 0-1

[Event "California State-ch"]
[Site "Atascadero"]
[Date "1949.09.01"]
[Round "1"]
[White "Pruner, Earl W"]
[Black "Jonas, Clark"]
[Result "1-0"]
[ECO "C84"]
[PlyCount "77"]
[EventDate "1949.09.01"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Nc3 b5 7. Bb3 d6 8. Nd5 Nxe4 9. Nxe7 Nxe7 10. d4 exd4 11. Qxd4 Nf6 12. Bg5 c5 13. Qf4 c4 14. Rfe1 Be6 15. Rad1 Ng6 16. Qg3 d5 17. Nd4 0-0 18. f4 Qc8 19. Bxf6 gxf6 20. Rc1 f5 21. h4 Qd8 22. h5 Qh4 23. Qxh4 Nxh4 24. g3 cxb3 25. axb3 Kh8 26. Kf2 Rg8 27. Rh1 Ng6 28. hxg6 Rxg6 29. Rh5 Rc8 30. Rch1 Rg7 31. c3 b4 32. g4 bxc3 33. bxc3 Rxc3 34. gxf5 Rg4 35. fxe6 Rxf4+ 36. Ke2 fxe6 37. Nxe6 Re4+ 38. Kd2 Rg4 39. Kxc3 1-0

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.24"]
[Round "3"]
[White "Donnelly, Howard"]
[Black "Jonas, Clark"]
[Result "0-1"]
[ECO "E50"]
[PlyCount "118"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 c5 6. a3 cxd4 7. axb4 dxc3 8. bxc3 b6 9. Bd3 Qc7 10. 0-0 Bb7 11. Nd4 Rd8 12. Nb5 Qc6 13. f3 d5 14. Nxa7 Qd7 15. cxd5 Bxd5 16. Bb5 Qe7 17. Qa4 Qc7 18. Bb2 h6 19. Rfd1 Nbd7 20. e4 Bc4 21. Bxc4 Qxc4 22. Qb5 Qb3 23. Qe2 Ne5 24. Rd4 Rxd4 25. cxd4 Nc4 26. Nc6 Ra2 27. Ne5 Nxb2 28. Rxa2 Qxa2 29. g4 Qa1+ 30. Kg2 Nd1 31. Nd3 Nc3 32. Qd2 Qa2 33. Qxa2 Nxa2 34. h4 g5 35. hxg5 hxg5 36. Kg3 Nc3 37. Kf2 Nd7 38. Ke3 Nb8 39. f4 gxf4+ 40. Nxf4 Nc6 41. Kd3 Nb5 42. d5 Ne5+ 43. Kc2 Ng6 44. Nh5 Kf8 45. dxe6 fxe6 46. Nf6 Ke7 47. g5 Nd4+ 48. Kd3 Nf3 49. Nh7 Nf8 50. Nxf8 Kxf8 51. Kc4 Nxg5 52. e5 Nf3 53. Kb5 Nxe5 54. Kxb6 Nd7+ 55. Kc6 Ke7 56. b5 e5 57. Kd5 Kd8 58. b6 Kc8 59. Kc6 Nxb6 0-1

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.15"]
[Round "2"]
[White "Jonas, Clark"]
[Black "Boyette, Leslie"]
[Result "1/2-1/2"]
[ECO "D41"]
[PlyCount "86"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. g3 e6 4. Bg2 c5 5. c4 Nc6 6. cxd5 Nxd5 7. 0-0 Be7 8. Nc3 Nxc3 9. bxc3 cxd4 10. cxd4 0-0 11. e4 Bf6 12. Bb2 Qb6 13. Rb1 Rd8 14. d5 Bxb2 15. Qe2 Ne7 16. Rxb2 Qd6 17. e5 Qxd5 18. Ng5 Qd3 19. Qxd3 Rxd3 20. Be4 Rd8 21. Bxh7+ Kf8 22. Be4 Rb8 23. f4 b6 24. h4 Ba6 25. Rff2 Rbc8 26. f5 exf5 27. Bxf5 Rc1+ 28. Kh2 Bb7 29. Be4 Bxe4 30. Nxe4 Ng6 31. Ng5 Nxe5 32. Ne6+ Ke7 33. Nxd8 Ng4+ 34. Kh3 Nxf2+ 35. Rxf2 Kxd8 36. Rxf7 Rc7 37. Rxc7 Kxc7 38. Kg4 b5 39. Kf5 b4 40. h5 a5 41. Ke5 a4 42. Kd4 Kd6 43. g4 Ke6 1/2-1/2

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.15"]
[Round "1"]
[White "Konkel, Robert"]
[Black "Jonas, Clark"]
[Result "1-0"]
[ECO "E26"]
[PlyCount "95"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 Qxd5 8. Nf3 Nc6 9. Bd3 0-0 10. 0-0 cxd4 11. cxd4 e5 12. dxe5 Nxe5 13. Bxh7+ Kxh7 14. Qxd5 Nxd5 15. Nxe5 f6 16. Nf3 b6 17. Nd4 Bb7 18. e4 Nc3 19. f3 Rfd8 20. Nf5 Rac8 21. Re1 Ne2+ 22. Rxe2 Rd1+ 23. Kf2 Rdxc1 24. Rxc1 Rxc1 25. Rd2 Bc8 26. Ne7 Be6 27. Rd6 Bc4 28. Rc6 b5 29. Rc7 a5 30. Nf5 b4 31. axb4 axb4 32. Rxg7+ Kh8 33. Rb7 b3 34. Ne3 Bg8 35. Kg3 Rc5 36. Nd5 Bxd5 37. exd5 Rxd5 38. Rxb3 Rg5+ 39. Kf2 Kg7 40. h4 Ra5 41. g4 f5 42. Kg3 Ra4 43. Rd3 Rb4 44. Rd5 fxg4 45. fxg4 Kf6 46. Rf5+ Kg6 47. h5+ Kg7 48. Kh4 1-0

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.??"]
[Round "9"]
[White "Bergman, Carl"]
[Black "Jonas, Clark"]
[Result "1-0"]
[ECO "C33"]
[PlyCount "57"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Qf3 Qh4+ 4. g3 fxg3 5. hxg3 Qf6 6. Qe3 d6 7. d4 Nc6 8. c3 Bg4 9. Nd2 0-0-0 10. Nh3 g6 11. Nf2 Bd7 12. d5 Ne5 13. Qxa7 Bg4 14. Nxg4 Nxg4 15. Bh3 h5 16. Qa8+ Kd7 17. Qxb7 Qf2+ 18. Kd1 Qxg3 19. Kc2 f5 20. Qc6+ Ke7 21. Bxg4 fxg4 22. Qxc7+ Rd7 23. Qc8 Nf6 24. Rf1 h4 25. Rxf6 Kxf6 26. Qxd7 h3 27. Nc4 h2 28. Be3 h1Q 29. Qe6+ 1-0

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.??"]
[Round "7"]
[White "Boyette, Leslie"]
[Black "Jonas, Clark"]
[Result "0-1"]
[ECO "D62"]
[PlyCount "56"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Bg5 Be7 5. Nc3 Nbd7 6. e3 c5 7. cxd5 Nxd5 8. Bxe7 Nxe7 9. Bd3 0-0 10. Qc2 g6 11. h4 cxd4 12. exd4 Nf6 13. 0-0-0 Ned5 14. Qd2 Nxc3 15. bxc3 Bd7 16. h5 Rc8 17. hxg6 fxg6 18. Bxg6 hxg6 19. Qh6 Kf7 20. Ne5+ Ke7 21. Nxg6+ Kd6 22. Qf4+ Kc6 23. Qe5 b6 24. d5+ Nxd5 25. Rxd5 exd5 26. Rh7 Qc7 27. Qg7 Rxf2 28. Qd4 Kb7 0-1

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.??"]
[Round "4"]
[White "Jonas, Clark"]
[Black "Bergman, Carl"]
[Result "1-0"]
[ECO "B29"]
[PlyCount "55"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nf6 3. Nc3 d5 4. e5 Nfd7 5. Nxd5 Nxe5 6. Bb5+ Nbc6 7. Nxe5 Qxd5 8. Bxc6+ bxc6 9. Nf3 Bg4 10. d3 Rb8 11. c4 Qd6 12. 0-0 e6 13. Qe2 Be7 14. Rb1 0-0 15. b3 Rbd8 16. Rd1 Rd7 17. Bb2 Bf5 18. Be5 Bxd3 19. Qe1 Bxb1 20. Bxd6 Rfd8 21. Rxb1 Rxd6 22. g3 f6 23. Kg2 e5 24. Rb2 f5 25. Nxe5 Bf6 26. f4 g5 27. Re2 g4 28. Qa5 1-0

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.??"]
[Round "8"]
[White "Jonas, Clark"]
[Black "Donnelly, Howard"]
[Result "1-0"]
[ECO "E40"]
[PlyCount "139"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. a3 Bxc3+ 6. bxc3 0-0 7. cxd5 exd5 8. Bd3 Bg4 9. Ne2 Re8 10. 0-0 Nbd7 11. a4 c5 12. Ba3 Rc8 13. Re1 Bh5 14. Qd2 c4 15. Bc2 Ne4 16. Bxe4 Rxe4 17. f3 Re8 18. Nf4 Qg5 19. Qf2 Nb6 20. Bc5 Rc6 21. Qg3 Qxg3 22. hxg3 Bg6 23. Bxb6 Rxb6 24. Nxd5 Rb2 25. e4 b6 26. Ne3 Rc8 27. Kf1 f6 28. Re2 Rb3 29. g4 Kf8 30. Nd1 Ke7 31. Rb2 Rxb2 32. Nxb2 Kd6 33. Kf2 a6 34. Ke3 Be8 35. Kd2 Bd7 36. Rh1 h6 37. Ra1 Rc7 38. Nd1 b5 39. axb5 Bxb5 40. Ne3 Ra7 41. Ra5 g6 42. Nd5 f5 43. Ke3 fxg4 44. fxg4 Rf7 45. Ra1 g5 46. Nb4 Rf4 47. e5+ Ke6 48. Nxa6 Bc6 49. Rh1 Bxg2 50. Rxh6+ Kf7 51. Rh7+ Kg6 52. Rc7 Rf3+ 53. Kd2 Rd3+ 54. Kc2 Be4 55. Nc5 Re3+ 56. Nxe4 Rxe4 57. Rc6+ Kg7 58. Rxc4 Rxg4 59. Kd3 Rg1 60. Ke4 Kg6 61. Rc6+ Kh5 62. e6 g4 63. Rc5+ Kg6 64. Kf4 Kf6 65. Re5 Ke7 66. Re3 Ke8 67. d5 Rd1 68. c4 g3 69. Rxg3 Rd4+ 70. Ke5 1-0

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.??"]
[Round "6"]
[White "Jonas, Clark"]
[Black "Konkel, Robert"]
[Result "0-1"]
[ECO "B73"]
[PlyCount "54"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. 0-0 0-0 9. Qd2 a6 10. f4 Qc7 11. Rad1 Bd7 12. h3 b5 13. a3 Rfd8 14. Nf3 Na5 15. Qe1 Nc4 16. Bc1 Rac8 17. Bd3 e6 18. Ne2 Qc5+ 19. Kh1 Ne3 20. b4 Qb6 21. Qf2 Nc4 22. Bxc4 Qxf2 23. Rxf2 Nxe4 24. Rff1 Rxc4 25. Nd2 Nxd2 26. Rxd2 Bc6 27. Rfd1 Bd5 0-1

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.??"]
[Round "10"]
[White "Jonas, Clark"]
[Black "Pruner, Earl W"]
[Result "0-1"]
[ECO "A52"]
[PlyCount "60"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4 Nc6 5. Nf3 Bb4+ 6. Nbd2 Qe7 7. a3 Ngxe5 8. Nxe5 Nxe5 9. Bxe5 Bxd2+ 10. Qxd2 Qxe5 11. e3 d6 12. Be2 Bf5 13. 0-0 0-0 14. Rfd1 Rfe8 15. b4 Be4 16. f3 Bc6 17. e4 f5 18. b5 Bd7 19. Bd3 f4 20. Be2 Be6 21. Qd4 Qg5 22. Rac1 b6 23. Rd2 Rf8 24. Re1 Rf6 25. Kf1 Rh6 26. Qg1 Qh5 27. h3 Rg6 28. Qh2 Rg3 29. Rc1 Bxh3 30. Rd5 Qh4 0-1

[Event "Northern California-ch"]
[Site "San Francisco"]
[Date "1949.07.??"]
[Round "5"]
[White "Pruner, Earl W"]
[Black "Jonas, Clark"]
[Result "1-0"]
[ECO "C78"]
[PlyCount "57"]
[EventDate "1949.07.15"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 d6 7. Ng5 d5 8. exd5 Nd4 9. c3 Nxb3 10. Qxb3 Qxd5 11. Re1 Qxb3 12. axb3 Nd7 13. d4 f6 14. Nf3 Bd6 15. Bf4 0-0 16. dxe5 fxe5 17. Bxe5 Nxe5 18. Nxe5 Bf5 19. Nd2 c5 20. Re2 Rfd8 21. Ndf3 a5 22. Nc6 Rd7 23. Rd1 Bxh2+ 24. Kxh2 Rxd1 25. Ne7+ Kf8 26. Nxf5 a4 27. bxa4 bxa4 28. Ng5 Rd5 29. Ne6+ 1-0

