[Event "Bialystok Autumn op-B"]
[Site "Bialystok"]
[Date "2007.11.25"]
[Round "8.1"]
[White "Siemieniuk, Marek"]
[Black "Malec, Sebastian"]
[Result "0-1"]
[ECO "B23"]
[BlackElo "1779"]
[PlyCount "58"]
[EventDate "2007.11.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 d6 6. d3 a6 7. 0-0 Na5 8. Bb3 Nxb3 9. axb3 Nh6 10. Qe1 b5 11. Qh4 f5 12. Nd5 e6 13. Qxd8+ Kxd8 14. Ne3 Ng4 15. Ng5 Ke7 16. c3 h6 17. Nf3 Bb7 18. Nh4 Kf7 19. Nxg4 fxg4 20. f5 exf5 21. exf5 g5 22. Ng6 Rhe8 23. Bd2 Re2 24. Rae1 Rxg2+ 25. Kh1 Rxd2+ 26. Kg1 Rg2+ 27. Kh1 Rxb2+ 28. Kg1 Rg2+ 29. Kh1 Rg3+ 0-1

[Event "Bialystok Autumn op-B"]
[Site "Bialystok"]
[Date "2007.11.25"]
[Round "9.4"]
[White "Siemieniuk, Marek"]
[Black "Sieliwonik, Katarzyna"]
[Result "0-1"]
[ECO "B23"]
[BlackElo "1707"]
[PlyCount "52"]
[EventDate "2007.11.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 g6 3. f4 Nc6 4. Nf3 Bg7 5. Bc4 e6 6. d3 Nge7 7. 0-0 0-0 8. Qe1 d5 9. Bb3 b6 10. Qh4 Bb7 11. Ng5 h6 12. Nf3 Nd4 13. Nxd4 Bxd4+ 14. Kh1 Bg7 15. f5 exf5 16. Bxh6 Bxh6 17. Qxh6 fxe4 18. dxe4 dxe4 19. Rad1 Qc7 20. Qg5 Rad8 21. Rxd8 Qxd8 22. h4 Qc7 23. h5 c4 24. Nb5 Qc6 25. Nxa7 Qd5 26. Qxe7 e3 0-1

[Event "Bialystok Autumn op-B"]
[Site "Bialystok"]
[Date "2007.11.24"]
[Round "7.4"]
[White "Buzun, Rafal"]
[Black "Siemieniuk, Marek"]
[Result "0-1"]
[ECO "B01"]
[PlyCount "60"]
[EventDate "2007.11.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. c4 c6 4. dxc6 Nxc6 5. Nf3 e5 6. b3 Bg4 7. h3 Bh5 8. Bb2 Be7 9. d3 e4 10. g4 exf3 11. gxh5 Bb4+ 12. Bc3 Qe7+ 13. Kd2 0-0-0 14. Kc2 Bxc3 15. Nxc3 Nd4+ 16. Kb2 Nxh5 17. Qd2 Rhe8 18. Nd5 Qe5 19. Nc3 Nf4 20. h4 Kb8 21. Bh3 Nde2 22. Bf5 Qxf5 23. Nd5 Nxd5 24. cxd5 Qxd5 25. Rad1 Qd4+ 26. Ka3 Qc3 27. Qg5 Rxd3 28. Qb5 Red8 29. Rxd3 Qxd3 30. Qe5+ Qd6+ 0-1

[Event "Bialystok Autumn op-B"]
[Site "Bialystok"]
[Date "2007.11.24"]
[Round "6.7"]
[White "Siemieniuk, Marek"]
[Black "Lukaszuk, Bartlomiej"]
[Result "1-0"]
[ECO "C22"]
[PlyCount "102"]
[EventDate "2007.11.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 b6 5. Bd2 Nge7 6. Nc3 Ng6 7. 0-0-0 Bc5 8. Qe1 0-0 9. h3 a5 10. f4 Bd4 11. Nf3 Bxc3 12. Bxc3 Nxf4 13. g4 Ba6 14. Qd2 Ne6 15. Bg2 Bb7 16. h4 b5 17. b3 b4 18. Bb2 d6 19. Qf2 Nf4 20. g5 Ba6 21. Nd4 Nxd4 22. Bxd4 Ne2+ 23. Kb1 Nxd4 24. Rxd4 Bb7 25. e5 Bxg2 26. Qxg2 Ra6 27. h5 Qa8 28. Qxa8 Rfxa8 29. exd6 Rxd6 30. Rxd6 cxd6 31. Rd1 Ra6 32. Rd5 Kf8 33. Kb2 Ke7 34. c3 Ke6 35. Rb5 bxc3+ 36. Kxc3 d5 37. Kd4 h6 38. Rxd5 Rd6 39. Rxd6+ Kxd6 40. gxh6 gxh6 41. Ke4 Ke6 42. a3 Kd6 43. Kf5 Kd5 44. Kf6 Kd4 45. Kxf7 Kc3 46. b4 a4 47. b5 Kb3 48. b6 Kxa3 49. b7 Ka2 50. b8Q a3 51. Qa8 Kb2 1-0

[Event "Bialystok Autumn op-B"]
[Site "Bialystok"]
[Date "2007.11.23"]
[Round "5.4"]
[White "Dubrawska, Greta"]
[Black "Siemieniuk, Marek"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "1574"]
[PlyCount "47"]
[EventDate "2007.11.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nf6 5. e3 e6 6. Bb5+ Bd7 7. Bxd7+ Nbxd7 8. Nc3 Bb4 9. Qb3 Qa5 10. Nge2 0-0 11. 0-0 Bxc3 12. Nxc3 Qb6 13. Qa3 Ne8 14. Rac1 Ndf6 15. h3 Nh5 16. Bh2 Nef6 17. b3 a6 18. Na4 Qd8 19. Bc7 Qd7 20. Nb6 Qb5 21. Nxa8 Rxa8 22. Qc5 Qd3 23. Be5 Ne4 24. Qc8+ 1-0

[Event "Bialystok Autumn op-B"]
[Site "Bialystok"]
[Date "2007.11.11"]
[Round "4.2"]
[White "Siemieniuk, Marek"]
[Black "Borawski, Jakub"]
[Result "1/2-1/2"]
[ECO "C22"]
[PlyCount "156"]
[EventDate "2007.11.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 d6 5. Bd2 Be6 6. Nc3 Nf6 7. 0-0-0 Ng4 8. Qe1 Be7 9. h3 Nf6 10. g4 Qd7 11. f4 Nxg4 12. hxg4 Bxg4 13. Be2 0-0-0 14. f5 Ne5 15. Be3 a6 16. Bd4 Bxe2 17. Qxe2 Bg5+ 18. Kb1 f6 19. Nf3 Nxf3 20. Qxf3 Qf7 21. Be3 Bxe3 22. Qxe3 h5 23. Nd5 Rde8 24. Nf4 Kb8 25. Ne6 g6 26. Qb3 gxf5 27. exf5 Qh7 28. a3 Re7 29. Qf3 h4 30. Rd4 h3 31. Rb4 c5 32. Rg4 Qh6 33. Rh2 Qh5 34. Rg3 Reh7 35. Qd3 Qh4 36. Qxd6+ Ka8 37. Qf4 Qh5 38. Nxc5 Qd1+ 39. Qc1 Qd6 40. Qg1 Rc8 41. Ne4 Qe5 42. Rg8 Rhc7 43. Rxc8+ Rxc8 44. Nf2 Qxf5 45. Nxh3 Re8 46. Qf2 Qe5 47. Nf4 Rd8 48. Nd3 Qg5 49. Rg2 Qh6 50. Qg1 Qf8 51. Rf2 Rd6 52. Qf1 Qd8 53. Kc1 Qb6 54. Re2 Qc6 55. Rd2 Qb6 56. Nb4 Qe3 57. Qf2 Qh6 58. Nd3 Rd8 59. Qg2 Qe3 60. Kb1 Rh8 61. Ka2 Qe6+ 62. b3 Rg8 63. Qf3 Rc8 64. Nb4 a5 65. Qd5 Qb6 66. Qd4 Qxd4 67. Rxd4 axb4 68. Rxb4 Rxc2+ 69. Kb1 Rc6 70. Rf4 Kb8 71. Kb2 Kc7 72. b4 b5 73. Rf5 Kb6 74. Kb3 Re6 75. Rf3 Kc6 76. a4 bxa4+ 77. Kxa4 Kb6 78. Rf4 Ka6 1/2-1/2

[Event "Bialystok Autumn op-B"]
[Site "Bialystok"]
[Date "2007.11.11"]
[Round "3.5"]
[White "Smolarczyk, Tomasz"]
[Black "Siemieniuk, Marek"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "95"]
[EventDate "2007.11.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 h6 5. Nc3 Nf6 6. h3 0-0 7. Be3 Bxe3 8. fxe3 d6 9. 0-0 Ne7 10. d4 exd4 11. exd4 c5 12. Qd3 cxd4 13. Nxd4 Nc6 14. Ndb5 Ne5 15. Qd4 Nxc4 16. Qxc4 Be6 17. Qd4 Ne8 18. Rad1 Qg5 19. Rf3 Qc5 20. Nxd6 Qxd4+ 21. Rxd4 Nxd6 22. Rxd6 Rac8 23. a3 Rfe8 24. Rf2 Rc5 25. Nd5 Bxd5 26. exd5 Re7 27. Kf1 Kf8 28. Rd8+ Re8 29. Rxe8+ Kxe8 30. c3 Rxd5 31. Re2+ Kd7 32. Ke1 Kd6 33. Rd2 Rxd2 34. Kxd2 Kd5 35. Kd3 f5 36. c4+ Ke5 37. b4 g5 38. a4 h5 39. b5 f4 40. a5 g4 41. hxg4 hxg4 42. c5 f3 43. Ke3 fxg2 44. Kf2 Kd5 45. Kxg2 Kxc5 46. Kg3 Kxb5 47. Kxg4 Kxa5 48. Kf3 0-1

[Event "Bialystok Autumn op-B"]
[Site "Bialystok"]
[Date "2007.11.10"]
[Round "2.3"]
[White "Siemieniuk, Marek"]
[Black "Mankowski, Piotr"]
[Result "0-1"]
[ECO "B23"]
[PlyCount "53"]
[EventDate "2007.11.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 e5 4. f5 Nd4 5. Nce2 Nf6 6. Nxd4 cxd4 7. d3 d5 8. Bg5 Bb4+ 9. Kf2 Nxe4+ 10. dxe4 Qxg5 11. Bb5+ Bd7 12. Bxd7+ Kxd7 13. Nf3 Qe3+ 14. Kg3 Qf4+ 15. Kf2 dxe4 16. c3 Bc5 17. Re1 exf3 18. g3 Qxf5 19. Qa4+ Kd6 20. Rad1 d3+ 21. Re3 Bxe3+ 22. Kxe3 e4 23. Qd4+ Qd5 24. Qxg7 Ke7 25. Qh6 Rag8 26. Qh3 Qxa2 27. Kxe4 0-1

[Event "Bialystok Autumn op-B"]
[Site "Bialystok"]
[Date "2007.11.10"]
[Round "1.7"]
[White "Wasiluk, Grzegorz"]
[Black "Siemieniuk, Marek"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "98"]
[EventDate "2007.11.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nc6 2. e3 e5 3. Bb5 d6 4. Nc3 Nf6 5. 0-0 Bg4 6. h3 Bh5 7. g4 Bg6 8. Nh4 Be7 9. d3 e4 10. dxe4 Nxe4 11. Nxg6 Nxc3 12. bxc3 hxg6 13. Kg2 a6 14. Ba4 b5 15. Qf3 Ne5 16. Qe4 bxa4 17. f4 Nd7 18. Qxa4 Qb8 19. Bd2 Qb7+ 20. Kg3 Qb5 21. Qxb5 axb5 22. a3 Nc5 23. Be1 Bh4+ 24. Kg2 Bxe1 25. Rfxe1 d5 26. Red1 c6 27. Rh1 Ne4 28. h4 Nxc3 29. h5 gxh5 30. gxh5 b4 31. axb4 Rxa1 32. Rxa1 Rxh5 33. Ra6 Kd7 34. Ra7+ Ke6 35. Ra6 Kd6 36. Ra7 Rf5 37. Kf3 Nb5 38. Rb7 g6 39. Kg4 Nc3 40. Kf3 Ke6 41. Rb6 Kd7 42. Rb7+ Kc8 43. Re7 Nb5 44. e4 dxe4+ 45. Kxe4 Nc3+ 46. Kf3 Nd5 47. Re8+ Kd7 48. Rg8 Rxf4+ 49. Kg3 Rxb4 0-1

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "11.4"]
[White "Buzun, Michal"]
[Black "Siemieniuk, Marek"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1860"]
[PlyCount "51"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 d6 4. d4 Nc6 5. d5 Nd4 6. h3 c6 7. Bc4 g6 8. Nf3 Nxf3+ 9. Qxf3 Bg7 10. 0-0 Bd7 11. Kh1 Qe7 12. fxe5 dxe5 13. Bg5 0-0-0 14. Bxf6 Bxf6 15. Qxf6 Qxf6 16. Rxf6 Rhf8 17. Raf1 Be8 18. dxc6 bxc6 19. Bxf7 Bxf7 20. Rxf7 Rxf7 21. Rxf7 Rd2 22. Rxa7 Rxc2 23. Ra5 Rxb2 24. Rxe5 Rc2 25. Rc5 Kb7 26. Kh2 1-0

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "5.1"]
[White "Chilkiewicz, Marek"]
[Black "Siemieniuk, Marek"]
[Result "1-0"]
[ECO "A20"]
[WhiteElo "1850"]
[PlyCount "109"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nc6 2. c4 e5 3. d3 Nf6 4. g3 Bc5 5. Bg2 h6 6. a3 a5 7. b3 0-0 8. Bb2 Ng4 9. 0-0 d6 10. Nc3 f5 11. Qd2 f4 12. Ne4 Bf5 13. Nxc5 dxc5 14. h3 Nf6 15. Nxe5 Nxe5 16. Bxe5 fxg3 17. fxg3 Bc8 18. Bxf6 Rxf6 19. Rxf6 Qxf6 20. Rf1 Qd4+ 21. Kh2 c6 22. Qf4 Bd7 23. Qf7+ Kh8 24. Be4 Qd6 25. Qg6 Qxg6 26. Bxg6 Kg8 27. Bf5 Bxf5 28. Rxf5 Re8 29. Rf2 Re3 30. Kg2 g6 31. h4 Kg7 32. g4 g5 33. h5 Kg8 34. Kf1 Re5 35. Rf6 Kg7 36. Rg6+ Kh7 37. Rd6 Re7 38. Kf2 Kg7 39. e3 Rf7+ 40. Ke2 Rf6 41. Rd7+ Rf7 42. Rxf7+ Kxf7 43. Kf3 Ke6 44. Ke4 Kf6 45. d4 cxd4 46. exd4 b6 47. d5 cxd5+ 48. Kxd5 Ke7 49. b4 axb4 50. axb4 Kd7 51. c5 bxc5 52. bxc5 Kc7 53. Ke6 Kc6 54. Kf6 Kxc5 55. Kg6 1-0

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "2.5"]
[White "Kopec, Maksymilian"]
[Black "Siemieniuk, Marek"]
[Result "1-0"]
[ECO "C26"]
[PlyCount "89"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 Bc5 5. d3 h6 6. Nge2 0-0 7. 0-0 d6 8. Na4 Bg4 9. Nxc5 dxc5 10. f3 Be6 11. Be3 Nd4 12. c3 Nxe2+ 13. Qxe2 b6 14. f4 exf4 15. Bxf4 Rc8 16. b3 Qd7 17. e5 Nd5 18. Bd2 Ne7 19. Be4 Ng6 20. Bf4 Rcd8 21. Rad1 Bg4 22. Bf3 Bxf3 23. Qxf3 Rfe8 24. d4 cxd4 25. cxd4 Qd5 26. Qc3 c6 27. Be3 Qe6 28. Rd2 Ne7 29. Rdf2 Rf8 30. b4 Nd5 31. Qa3 Nxe3 32. Qxe3 Qc4 33. Rf4 Qxa2 34. R4f3 Qd5 35. Qf2 Rd7 36. h4 Qc4 37. g4 Qxb4 38. e6 Re7 39. exf7+ Kh8 40. g5 h5 41. Rf6 Kh7 42. Qf5+ Kh8 43. Rh6+ gxh6 44. Qf6+ Kh7 45. Qxh6# 1-0

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "9.3"]
[White "Nasuta, Grzegorz"]
[Black "Siemieniuk, Marek"]
[Result "1-0"]
[ECO "C51"]
[WhiteElo "1858"]
[PlyCount "115"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. 0-0 dxc3 8. Bxf7+ Kxf7 9. Qd5+ Kf8 10. Qxc5+ Qe7 11. Qc4 d6 12. Nxc3 Nf6 13. Bg5 Qf7 14. Nd5 Be6 15. Bxf6 Qxf6 16. Rab1 Qg6 17. Rxb7 Na5 18. Qxc7 Nxb7 19. Qe7+ Kg8 20. Qxb7 Qe8 21. Nc7 Qc8 22. Qxa8 Qxa8 23. Nxa8 Bxa2 24. Ra1 Kf7 25. Rxa2 Rxa8 26. Kf1 a5 27. Ra4 Kf6 28. Ke2 h6 29. Ke3 Ke6 30. Nd4+ Kf6 31. Nb3 Ke5 32. Rxa5+ Rxa5 33. Nxa5 d5 34. exd5 Kxd5 35. Kf4 Ke6 36. Ke4 Kf6 37. Nc6 Ke6 38. Nd4+ Kf6 39. Nf5 Kg6 40. Nxg7 Kxg7 41. Kf5 Kf7 42. g4 Kg7 43. h4 Kf7 44. h5 Kg7 45. Ke6 Kg8 46. Kf6 Kh7 47. Kf7 Kh8 48. Kg6 Kg8 49. Kxh6 Kh8 50. f4 Kg8 51. Kg6 Kh8 52. Kf7 Kh7 53. h6 Kh8 54. g5 Kh7 55. g6+ Kxh6 56. g7 Kh7 57. g8Q+ Kh6 58. Qg6# 1-0

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "7.2"]
[White "Puksza, Andrzej"]
[Black "Siemieniuk, Marek"]
[Result "1-0"]
[ECO "C62"]
[WhiteElo "1915"]
[PlyCount "67"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. Bxc6 Bxc6 6. Nc3 exd4 7. Nxd4 Nf6 8. Nxc6 bxc6 9. Qf3 Qd7 10. Bf4 Be7 11. 0-0-0 0-0 12. e5 Ne8 13. Qg3 Qe6 14. Rhe1 Qg6 15. Qf3 d5 16. Ne2 Rb8 17. g3 Rb4 18. Bd2 Rc4 19. Bc3 Bb4 20. Qd3 Bxc3 21. Nxc3 f6 22. Qxg6 hxg6 23. f4 fxe5 24. Rxe5 Nf6 25. Rd3 Ng4 26. Re2 Kf7 27. b3 Rb4 28. h3 Nf6 29. a3 Rbb8 30. Na4 Ne4 31. Nc3 Nxc3 32. Rxc3 Rfe8 33. Rxe8 Rxe8 34. Rxc6 1-0

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "8.3"]
[White "Siemieniuk, Marek"]
[Black "Bernacki, Gabriel"]
[Result "0-1"]
[ECO "B01"]
[BlackElo "1836"]
[PlyCount "58"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Nf3 Nxd5 4. Bc4 Bg4 5. h3 Bh5 6. 0-0 e6 7. d4 Nb6 8. Bb3 Nc6 9. c3 Be7 10. Qd3 Bg6 11. Qe3 0-0 12. Nbd2 Nd5 13. Bxd5 exd5 14. Ne5 Nxe5 15. Qxe5 c6 16. Nf3 Re8 17. Qg3 Be4 18. Ng5 Bxg5 19. Bxg5 f6 20. Bd2 Qb6 21. b3 a5 22. Rfe1 Qa7 23. Re3 b5 24. Rae1 Qd7 25. f3 Bg6 26. Rxe8+ Rxe8 27. Rxe8+ Bxe8 28. c4 dxc4 29. bxc4 Qxd4+ 0-1

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "6.4"]
[White "Siemieniuk, Marek"]
[Black "Lapinski, Krzysztof"]
[Result "0-1"]
[ECO "B33"]
[BlackElo "2169"]
[PlyCount "26"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 Bb4 7. Bd3 d5 8. 0-0 Bxc3 9. bxc3 dxe4 10. Bxe4 Nxe4 11. Qxd8+ Kxd8 12. Rd1+ Kc7 13. c4 Be6 0-1

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "4.5"]
[White "Siemieniuk, Marek"]
[Black "Sieliwonik, Piotr"]
[Result "0-1"]
[ECO "C01"]
[BlackElo "1926"]
[PlyCount "118"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. Nc3 c6 6. Be2 Ne7 7. 0-0 0-0 8. Bg5 f6 9. Bh4 Nf5 10. Bg3 Nxg3 11. fxg3 Bg4 12. Nh4 Bxe2 13. Qxe2 Qd7 14. Rae1 Na6 15. Qe6+ Qxe6 16. Rxe6 Rad8 17. Nf5 Bc7 18. Re7 Rf7 19. Rfe1 Rd7 20. Rxd7 Rxd7 21. a3 Kf7 22. Ne2 g6 23. Nh4 Re7 24. Kf2 Nb8 25. Nf3 Nd7 26. h4 Nb6 27. b3 Bd6 28. a4 Bc7 29. Nf4 Nc8 30. Nd3 Nd6 31. Rxe7+ Kxe7 32. g4 Ne4+ 33. Ke3 Bg3 34. h5 b6 35. Nd2 Nc3 36. Nb4 Kd6 37. Kd3 Nd1 38. Ke2 Nc3+ 39. Kd3 Nd1 40. Ke2 Nb2 41. Nd3 Nxd3 42. Kxd3 gxh5 43. gxh5 Ke6 44. Ke3 Kf5 45. Kf3 Be1 46. Nb1 Kg5 47. g4 f5 48. gxf5 Kxf5 49. Ke2 Bg3 50. Nd2 Kg5 51. c4 Kxh5 52. cxd5 cxd5 53. Nf3 Kg4 54. Ke3 h5 55. Ke2 h4 56. Nxh4 Bxh4 57. Kd3 Kf4 58. b4 Be1 59. b5 Ba5 0-1

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "10.2"]
[White "Siemieniuk, Marek"]
[Black "Wirchanowicz, Magdalena"]
[Result "1/2-1/2"]
[ECO "C01"]
[PlyCount "109"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nf6 5. g3 Be7 6. Bg2 0-0 7. 0-0 Be6 8. Ne5 Nc6 9. Nxc6 bxc6 10. Nd2 Rb8 11. Nf3 c5 12. c3 Bd6 13. b3 h6 14. Re1 cxd4 15. Nxd4 Qd7 16. Be3 a6 17. Qd3 a5 18. Re2 c5 19. Nxe6 fxe6 20. Rae1 Rfe8 21. Qg6 Qf7 22. Qxf7+ Kxf7 23. Bd2 c4 24. bxc4 dxc4 25. Bh3 e5 26. Bf1 Rbc8 27. Rb1 Rb8 28. Rxb8 Rxb8 29. Re1 Rb2 30. Bxc4+ Kf8 31. Rd1 Ne4 32. Be3 Ke7 33. Rc1 Ba3 34. Bd5 Nxf2 35. Bxf2 Rxf2 36. Kxf2 Bxc1 37. Kf3 Kd6 38. Ke4 Bb2 39. c4 Kc5 40. Kf5 Kd4 41. Kg6 e4 42. Kxg7 e3 43. Bf3 Kxc4+ 44. Kxh6 Kb4 45. Kg5 Ka3 46. Kf4 Bc1 47. Ke4 Kxa2 48. Bd1 a4 49. Kd3 a3 50. Kc2 Bd2 51. g4 Ka1 52. h4 a2 53. g5 e2 54. Bxe2 Bxg5 55. hxg5 1/2-1/2

