[Event "Blagoevgrad op"]
[Site "Blagoevgrad"]
[Date "2013.10.04"]
[Round "9"]
[White "Kostev, Aleks"]
[Black "Borisov, Kiril"]
[Result "1/2-1/2"]
[ECO "B34"]
[BlackElo "1822"]
[PlyCount "52"]
[EventDate "2013.09.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "CBM 156 Extra"]
[Source "ChessBase"]
[SourceDate "2013.10.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.10.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nxc6 bxc6 6. Nc3 Bg7 7. Qd3 Nf6 8. Be3 Rb8 9. 0-0-0 Qa5 10. b3 Rb4 11. f3 0-0 12. a4 Rd8 13. Bd2 Rb6 14. Nd5 Qc5 15. b4 Qd6 16. Nxb6 Qxd3 17. Bxd3 axb6 18. e5 Nd5 19. c4 Nc7 20. f4 d5 21. b5 c5 22. a5 Bb7 23. g3 dxc4 24. axb6 Na8 25. Bxc4 Nxb6 26. Ba5 Rxd1+ 1/2-1/2

[Event "Blagoevgrad op"]
[Site "Blagoevgrad"]
[Date "2013.10.03"]
[Round "8"]
[White "Georgiev, Kiril Angelov"]
[Black "Kostev, Aleks"]
[Result "0-1"]
[ECO "C44"]
[PlyCount "26"]
[EventDate "2013.09.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "CBM 156 Extra"]
[Source "ChessBase"]
[SourceDate "2013.10.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.10.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d3 Nf6 4. b3 d5 5. exd5 Nxd5 6. Be2 Bd6 7. 0-0 0-0 8. Bb2 Nf4 9. Nbd2 Nd4 10. Nxd4 exd4 11. Bf3 f5 12. Bxd4 Qh4 13. Be3 Ne2+ 0-1

[Event "Blagoevgrad op"]
[Site "Blagoevgrad"]
[Date "2013.10.01"]
[Round "6"]
[White "Kostev, Aleks"]
[Black "Strendeva, Viktoria"]
[Result "1/2-1/2"]
[ECO "C50"]
[PlyCount "137"]
[EventDate "2013.09.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "CBM 156 Extra"]
[Source "ChessBase"]
[SourceDate "2013.10.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.10.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. 0-0 Nf6 5. d3 h6 6. Be3 Bb6 7. Nc3 0-0 8. h3 d6 9. Kh1 Be6 10. Bb3 Re8 11. Re1 Rf8 12. Rf1 Kh7 13. Kg1 Kg8 14. Kh2 Re8 15. Kh1 Rf8 16. Kh2 Kh7 17. Kg1 Kg8 18. Re1 Re8 19. Rf1 Rf8 20. Kh1 Kh7 21. Kg1 Kg8 22. Kh1 Kh7 23. Kh2 Kg8 24. Kg1 Kh7 25. Re1 Kg8 26. Kh1 Re8 27. Rf1 Rf8 28. Kh2 Kh7 29. Kh1 Kg8 30. Kg1 Kh7 31. Re1 Kg8 32. Kh2 Re8 33. Kg1 Rf8 34. Kh2 Kh7 35. Rf1 Kg8 36. Kg1 Kh7 37. Kh1 Kg8 38. Re1 Kh7 39. Rf1 Kg8 40. Kh2 Re8 41. Kg1 Kh7 42. Nd5 Kg8 43. Kh1 Rf8 44. Re1 Re8 45. Kg1 Rf8 46. Rf1 Kh7 47. Kh1 Kg8 48. Kg1 Kh7 49. d4 Nxd4 50. Bxd4 Bxd4 51. Nxd4 exd4 52. Qxd4 c6 53. Nxf6+ Qxf6 54. Qxf6 gxf6 55. c4 Rg8 56. Kh2 Rg7 57. Rac1 Rag8 58. Rg1 c5 59. Ba4 f5 60. exf5 Bxf5 61. Bc2 Bxc2 62. Rxc2 f5 63. f3 Rd7 64. Rd1 Rgd8 65. Rcd2 a6 66. g4 fxg4 67. fxg4 b5 68. b3 Kg7 69. Kg3 1/2-1/2

[Event "Blagoevgrad op"]
[Site "Blagoevgrad"]
[Date "2013.10.01"]
[Round "5"]
[White "Milkov, Nikola"]
[Black "Kostev, Aleks"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "103"]
[EventDate "2013.09.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "CBM 156 Extra"]
[Source "ChessBase"]
[SourceDate "2013.10.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.10.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Bc5 4. Bc4 Nf6 5. d3 h6 6. 0-0 0-0 7. Be3 d6 8. h3 a6 9. a3 Be6 10. b4 Bd4 11. Bxd4 Nxd4 12. Nxd4 exd4 13. Nd5 Nxd5 14. Bxd5 c6 15. Bb3 Bxb3 16. cxb3 f5 17. Re1 c5 18. Rc1 b6 19. bxc5 dxc5 20. b4 cxb4 21. Qb3+ Kh8 22. Qxb4 f4 23. f3 b5 24. e5 Rf5 25. Re4 Ra7 26. Rxd4 Rd7 27. Rxd7 Qxd7 28. d4 Qa7 29. Kh1 Qa8 30. e6 Rf8 31. Re1 Rb8 32. e7 Kh7 33. Qb1+ Kh8 34. Qg6 Re8 35. d5 Qc8 36. d6 Qd7 37. Qxe8+ Qxe8 38. d7 Qxd7 39. e8Q+ Qxe8 40. Rxe8+ Kh7 41. Ra8 Kg6 42. Rxa6+ Kg5 43. Ra5 Kh4 44. Rxb5 h5 45. a4 g5 46. a5 Kg3 47. a6 h4 48. a7 Kf2 49. Re5 Kf1 50. a8Q Kf2 51. Qa2+ Kg3 52. Rxg5# 1-0

[Event "Blagoevgrad op"]
[Site "Blagoevgrad"]
[Date "2013.09.30"]
[Round "4"]
[White "Kostev, Aleks"]
[Black "Malinov, Boyan"]
[Result "0-1"]
[ECO "B50"]
[BlackElo "1650"]
[PlyCount "40"]
[EventDate "2013.09.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "CBM 156 Extra"]
[Source "ChessBase"]
[SourceDate "2013.10.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.10.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bc4 Nf6 4. Nc3 a6 5. a4 Qa5 6. e5 dxe5 7. Nxe5 e6 8. Qf3 Bd6 9. Nd3 Nc6 10. 0-0 Qc7 11. g3 Nd4 12. Qd1 b6 13. f3 Bb7 14. Kh1 Bxg3 15. h3 Bh4 16. b4 Qg3 17. Ne1 Qxh3+ 18. Kg1 Ng4 19. Bb5+ axb5 20. Rf2 Bxf2# 0-1

[Event "Blagoevgrad op"]
[Site "Blagoevgrad"]
[Date "2013.09.29"]
[Round "3"]
[White "Dermatopoulos, Konstantinos"]
[Black "Kostev, Aleks"]
[Result "1-0"]
[ECO "C53"]
[WhiteElo "1664"]
[PlyCount "95"]
[EventDate "2013.09.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "CBM 156 Extra"]
[Source "ChessBase"]
[SourceDate "2013.10.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.10.22"]
[SourceQuality "1"]

1. e4 e5 2. Bc4 Nc6 3. Nf3 Bc5 4. c3 Qf6 5. d3 h6 6. 0-0 d6 7. h3 Nge7 8. b4 Bb6 9. a4 a6 10. Nbd2 Be6 11. Qe2 0-0 12. Rd1 Ba7 13. b5 axb5 14. Bxb5 d5 15. a5 d4 16. c4 Nb4 17. Nf1 c5 18. Qb2 b6 19. Qb3 Bxh3 20. N1h2 Be6 21. Bd2 bxa5 22. Rxa5 Nbc6 23. Ra2 Kh8 24. Rda1 Kg8 25. Bxc6 Nxc6 26. Qb7 Rfc8 27. Qb2 Qe7 28. Ra4 Kh8 29. Qc1 f6 30. Nh4 Qf7 31. Nf1 g5 32. Nf5 Bxf5 33. exf5 h5 34. Qd1 g4 35. Qe2 Rd8 36. Qe4 Rdc8 37. Ra6 Qe8 38. f3 gxf3 39. Qxf3 Rc7 40. Ng3 Rh7 41. Qxc6 Qg8 42. Qxf6+ Rg7 43. Nxh5 Rf8 44. Qxg7+ Qxg7 45. Nxg7 Kxg7 46. Rxa7+ Rf7 47. Rxf7+ Kxf7 48. Bg5 1-0

[Event "Blagoevgrad op"]
[Site "Blagoevgrad"]
[Date "2013.09.29"]
[Round "2"]
[White "Kostev, Aleks"]
[Black "Tevdovski, Zoran"]
[Result "0-1"]
[ECO "B30"]
[BlackElo "1710"]
[PlyCount "80"]
[EventDate "2013.09.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "CBM 156 Extra"]
[Source "ChessBase"]
[SourceDate "2013.10.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.10.22"]
[SourceQuality "1"]

1. e4 e6 2. Nc3 c5 3. Bc4 Nc6 4. Nf3 Na5 5. d3 Nxc4 6. dxc4 a6 7. a4 h6 8. h4 Ne7 9. h5 Nc6 10. Be3 Qc7 11. Qd2 Qd6 12. Qxd6 Bxd6 13. 0-0-0 Be7 14. e5 b6 15. Ne4 Bb7 16. Nd6+ Bxd6 17. exd6 Na5 18. b3 Bxf3 19. gxf3 f6 20. f4 Kf7 21. Rhg1 Rac8 22. Kb2 Rc6 23. Rge1 Nb7 24. Ka3 Rxd6 25. Rxd6 Nxd6 26. f3 Rd8 27. Ra1 Nf5 28. Bf2 d5 29. b4 cxb4+ 30. Kxb4 a5+ 31. Kb5 Nd6+ 32. Ka6 Nxc4 33. Bxb6 Rd6 34. Kb5 Rxb6+ 35. Kc5 Rb2 36. Rc1 g6 37. hxg6+ Kxg6 38. Rg1+ Kf5 39. Rh1 Rxc2 40. Kb5 Rb2+ 0-1

[Event "Blagoevgrad op"]
[Site "Blagoevgrad"]
[Date "2013.09.28"]
[Round "1"]
[White "Dyulgerov, Dimitar"]
[Black "Kostev, Aleks"]
[Result "1-0"]
[ECO "D25"]
[WhiteElo "1996"]
[PlyCount "69"]
[EventDate "2013.09.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "CBM 156 Extra"]
[Source "ChessBase"]
[SourceDate "2013.10.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.10.22"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. Nf3 dxc4 4. e3 b5 5. a4 Ba6 6. axb5 Bxb5 7. b3 e6 8. bxc4 Bd7 9. Be2 Bb4+ 10. Bd2 Nc6 11. 0-0 a5 12. Nc3 Qe7 13. d5 Bxc3 14. dxc6 Bxa1 15. cxd7+ Qxd7 16. Qxa1 0-0 17. Bc3 e5 18. Nxe5 Qe6 19. Bf3 Ra6 20. Rd1 Rd6 21. Rxd6 Qxd6 22. h3 g6 23. Qxa5 Nd7 24. Nxd7 Qxd7 25. Qg5 f6 26. Bxf6 c6 27. Bd4 Rf5 28. Qg3 Qc8 29. Bg4 c5 30. Bc3 h5 31. Bxf5 Qxf5 32. Qe5 Qf8 33. Qh8+ Kf7 34. Qxf8+ Kxf8 35. Kf1 1-0

[Event "Varna op U08"]
[Site "Varna"]
[Date "2013.07.03"]
[Round "9"]
[White "Georgiev, Yordan"]
[Black "Kostev, Aleks"]
[Result "1-0"]
[ECO "D01"]
[PlyCount "36"]
[EventDate "2013.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. Bg5 Bf5 4. Nc3 Nc6 5. e3 Qd6 6. Bf4 Qd7 7. Bb5 0-0-0 8. Ne5 Qe6 9. 0-0 Nxe5 10. Bxe5 Ne4 11. Ne2 Qg6 12. Nf4 Qg5 13. Qh5 f6 14. Qxg5 Nxg5 15. h4 Nf7 16. Rad1 Bxc2 17. Rc1 c6 18. Rxc2 fxe5 1-0

[Event "Varna op U08"]
[Site "Varna"]
[Date "2013.07.02"]
[Round "8"]
[White "Mkrtchyan, Mikayel"]
[Black "Kostev, Aleks"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1911"]
[PlyCount "70"]
[EventDate "2013.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 0-0 6. Bb5 a6 7. Bxc6 dxc6 8. Nxe5 Re8 9. Nf3 b5 10. a3 a5 11. d4 Bd6 12. e5 Nh5 13. 0-0 Bf8 14. Ne1 g6 15. Nf3 b4 16. Bg5 f6 17. exf6 Nxf6 18. axb4 Bxb4 19. Ne5 Ba6 20. Re1 h6 21. Nxc6 Rxe1+ 22. Qxe1 Qd6 23. Bxf6 Qxc6 24. Be5 Bb7 25. d5 Qe8 26. Bxc7 Bxd5 27. Qxe8+ Rxe8 28. Nxd5 Re2 29. c3 Be7 30. Nxe7+ Rxe7 31. Bxa5 Re2 32. b4 h5 33. g3 g5 34. Bc7 Kf7 35. b5 Kg6 1-0

[Event "Varna op U08"]
[Site "Varna"]
[Date "2013.07.01"]
[Round "7"]
[White "Kostev, Aleks"]
[Black "Apulcheva, Kristina"]
[Result "1-0"]
[ECO "D00"]
[PlyCount "125"]
[EventDate "2013.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. Nc3 Nf6 3. Nf3 Nc6 4. Bf4 a6 5. e3 Bg4 6. h3 Bh5 7. a3 e6 8. g4 Bg6 9. Bg2 Bd6 10. Be5 0-0 11. 0-0 Ne4 12. Na4 b5 13. Nc3 a5 14. Nxb5 Bxe5 15. dxe5 f6 16. Nfd4 Nxe5 17. Nxe6 Qd7 18. Nbxc7 Rac8 19. Nxf8 Rxf8 20. Nxd5 Rd8 21. Nb6 Qc7 22. Nd5 Qf7 23. Qd4 Qxd5 24. Rfd1 Qxd4 25. Rxd4 Rxd4 26. exd4 Nc4 27. b4 axb4 28. axb4 Ned6 29. Bd5+ Kf8 30. Ra6 Bxc2 31. Bxc4 Nxc4 32. b5 Be4 33. Kh2 Bd5 34. f4 g5 35. Rxf6+ Ke7 36. fxg5 Kd7 37. Rh6 Bg8 38. b6 Kc8 39. Kg3 Kb7 40. Kf4 Bd5 41. Rxh7+ Kxb6 42. g6 Kc6 43. Kg5 Kd6 44. Kf6 Kc6 45. Kg7 Kd6 46. Kh8 Ke6 47. g7 Kf6 48. g8Q Bxg8 49. Kxg8 Nd6 50. h4 Kg6 51. g5 Ne4 52. Rh6+ Kf5 53. g6 Nf6+ 54. Kf7 Nd5 55. g7 Ke4 56. g8Q Kxd4 57. Kf8 Kc5 58. Rh5 Kc6 59. Qxd5+ Kb6 60. Rh6+ Kc7 61. Kg7 Kb8 62. Qd7 Ka8 63. Rh8# 1-0

[Event "Varna op U08"]
[Site "Varna"]
[Date "2013.06.30"]
[Round "6"]
[White "Kulev, Atanas"]
[Black "Kostev, Aleks"]
[Result "0-1"]
[ECO "D45"]
[PlyCount "40"]
[EventDate "2013.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d5 3. Nf3 c6 4. e3 e6 5. Nc3 Ne4 6. Nxe4 dxe4 7. Nd2 b6 8. Nxe4 f5 9. Nd2 Bd6 10. b3 0-0 11. Bb2 Bb7 12. Bd3 Qf6 13. 0-0 Qh6 14. h3 Rf6 15. c5 bxc5 16. dxc5 Rg6 17. cxd6 Qxh3 18. g3 Rh6 19. Qh5 Rxh5 20. f3 Qh2# 0-1

[Event "Varna op U08"]
[Site "Varna"]
[Date "2013.06.29"]
[Round "5"]
[White "Kostev, Aleks"]
[Black "Kolev, Georgi"]
[Result "0-1"]
[ECO "B17"]
[PlyCount "112"]
[EventDate "2013.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Bc4 Bg4 8. Be3 e6 9. c3 Be7 10. h3 Bh5 11. g4 Bg6 12. Bd3 Bxd3 13. Qxd3 Qc7 14. 0-0-0 0-0-0 15. c4 Rhe8 16. Ne5 Bd6 17. Bf4 h6 18. h4 Nxg4 19. Nxg4 Bxf4+ 20. Kb1 Rd7 21. Qa3 Qb6 22. c5 Qa6 23. Qf3 Bc7 24. Ne5 Bxe5 25. dxe5 Ree7 26. Rd6 Qa5 27. Rg1 Qxc5 28. Rgd1 Qxe5 29. Qa3 a6 30. R1d4 Kc7 31. f4 Qe1+ 32. Rd1 Qe4+ 33. Ka1 Qxf4 34. Qa5+ Kc8 35. Qa3 Rxd6 36. Qxd6 Qxd6 37. Rxd6 Rd7 38. Rxd7 Kxd7 39. Kb1 Kd6 40. Kc2 Ke5 41. Kd3 Kf4 42. b4 b6 43. Kc4 Ke5 44. a4 Kd6 45. b5 axb5+ 46. axb5 cxb5+ 47. Kxb5 g5 48. hxg5 h5 49. Kxb6 h4 50. Kb7 h3 51. Kc8 h2 52. Kd8 h1Q 53. Ke8 Qh7 54. Kf8 e5 55. g6 fxg6 56. Ke8 Qe7# 0-1

[Event "Varna op U08"]
[Site "Varna"]
[Date "2013.06.28"]
[Round "4"]
[White "Kostev, Aleks"]
[Black "Tsesler, Yakau"]
[Result "1-0"]
[ECO "C57"]
[PlyCount "78"]
[EventDate "2013.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d3 h6 7. Ne4 Nd4 8. 0-0 Nf6 9. c3 Nxe4 10. dxe4 Be6 11. cxd4 Bxc4 12. Qa4+ c6 13. Qxc4 exd4 14. Rd1 c5 15. b4 b6 16. bxc5 bxc5 17. Ba3 Rc8 18. Qa4+ Ke7 19. Qxa7+ Ke8 20. Nc3 Ra8 21. Qb7 Rxa3 22. Nb5 Ra5 23. Nc7+ Kd7 24. Nd5+ Ke8 25. Qc6+ Qd7 26. Qxd7+ Kxd7 27. Rab1 Rxa2 28. Nb6+ Ke8 29. Nd5 Re2 30. Rb8+ Kd7 31. f3 g6 32. Nf6+ Kc7 33. Rbb1 Bg7 34. Nd5+ Kd6 35. Rb6+ Ke5 36. Rb7 Bf8 37. Rb8 Bg7 38. Rb7 Bf8 39. Rxf7 Rg8 1-0

[Event "Varna op U08"]
[Site "Varna"]
[Date "2013.06.26"]
[Round "3"]
[White "Strendeva, Viktoria"]
[Black "Kostev, Aleks"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "52"]
[EventDate "2013.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. 0-0 Nf6 5. d3 0-0 6. Bg5 d6 7. Nbd2 h6 8. Bh4 Be6 9. Bb3 a5 10. Ba4 Qe8 11. Bxf6 gxf6 12. Nh4 Kh7 13. Qf3 Nd4 14. Bxe8 Nxf3+ 15. Ndxf3 Rfxe8 16. c3 b5 17. d4 exd4 18. cxd4 Bb6 19. Rac1 Bxa2 20. Rfe1 c5 21. dxc5 Bxc5 22. Nf5 b4 23. Rcd1 Rab8 24. Ra1 b3 25. Rad1 a4 26. Re2 Rb4 0-1

[Event "Varna op U08"]
[Site "Varna"]
[Date "2013.06.25"]
[Round "2"]
[White "Kostev, Aleks"]
[Black "Boger, Yury"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "60"]
[EventDate "2013.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. 0-0 0-0 6. Nc3 d6 7. a3 Bg4 8. Nd5 Nd4 9. Bg5 Bxf3 10. gxf3 c6 11. Nxf6+ gxf6 12. Be3 b5 13. b4 Bb6 14. Bb3 Nxb3 15. cxb3 Bxe3 16. fxe3 Qb6 17. d4 exd4 18. Qxd4 Qxd4 19. exd4 d5 20. Rac1 Rac8 21. Rc2 dxe4 22. fxe4 Kg7 23. Rcf2 Rcd8 24. Rg2+ Kh8 25. Rd1 Rfe8 26. Re2 f5 27. e5 f6 28. e6 Rd6 29. e7 Rd7 30. Rf2 Rd5 0-1

[Event "Varna op U08"]
[Site "Varna"]
[Date "2013.06.24"]
[Round "1"]
[White "Alya, Sarhan Hassan"]
[Black "Kostev, Aleks"]
[Result "0-1"]
[ECO "A07"]
[PlyCount "58"]
[EventDate "2013.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BUL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 Bf5 3. Bg2 Nc6 4. d3 e6 5. 0-0 Nf6 6. Qd2 Bb4 7. Qd1 0-0 8. g4 Bxg4 9. h3 Bxf3 10. exf3 e5 11. Re1 Bxe1 12. Qxe1 e4 13. dxe4 Re8 14. Bd2 Nd4 15. Be3 Nxc2 16. Qd1 Nxa1 17. Nc3 b6 18. exd5 c6 19. Kh1 Nxd5 20. Qxa1 Nxe3 21. fxe3 Rxe3 22. a4 Qh4 23. Kh2 Rae8 24. Qd1 Qf4+ 25. Kg1 Re1+ 26. Kf2 Rxd1 27. Bf1 Qd2+ 28. Be2 Qe3+ 29. Kg2 Qg1# 0-1

