[Event "GRE-ch South U16"]
[Site "Athens"]
[Date "2020.09.02"]
[Round "8"]
[White "Sakkas, Konstantinos"]
[Black "Papagiannis, Asterios"]
[Result "0-1"]
[ECO "E11"]
[WhiteElo "1764"]
[BlackElo "2009"]
[PlyCount "82"]
[EventDate "2020.08.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 a5 5. Bg2 d6 6. Nc3 0-0 7. Nf3 Nbd7 8. 0-0 e5 9. e3 c6 10. Qc2 Re8 11. a3 Bxc3 12. Bxc3 e4 13. Nd2 d5 14. cxd5 cxd5 15. b4 a4 16. Bb2 Nb6 17. Rfc1 Be6 18. Qc7 Re7 19. Qxd8+ Rxd8 20. Bf1 Ne8 21. Rc5 Nd6 22. Rac1 f5 23. Rc7 Rxc7 24. Rxc7 Rc8 25. Rxc8+ Bxc8 26. Bc1 Bd7 27. Nb1 Bb5 28. Nc3 Bc4 29. Bxc4 dxc4 30. Kf1 Kf7 31. Ke2 Ke6 32. Kd2 Kd7 33. Kc2 Kc6 34. Bd2 Nb5 35. Kb2 Nxc3 36. Kxc3 Kb5 37. Kb2 Nd5 38. h3 c3+ 39. Bxc3 Kc4 40. Be1 Kd3 41. b5 Ke2 0-1

[Event "GRE-ch South U16"]
[Site "Athens"]
[Date "2020.09.01"]
[Round "7"]
[White "Drakonakis, Athanasios"]
[Black "Sakkas, Konstantinos"]
[Result "0-1"]
[ECO "D13"]
[WhiteElo "1755"]
[BlackElo "1764"]
[PlyCount "119"]
[EventDate "2020.08.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[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 Nc6 5. Nc3 a6 6. e3 Nf6 7. Bd3 e6 8. Nf3 Bd6 9. Bxd6 Qxd6 10. 0-0 0-0 11. Rc1 e5 12. dxe5 Nxe5 13. Nxe5 Qxe5 14. Be2 Be6 15. Bf3 Rac8 16. Qd4 Qxd4 17. exd4 Rc4 18. Ne2 Rfc8 19. b3 Rc2 20. a3 Bg4 21. Rxc2 Rxc2 22. Rc1 Rxc1+ 23. Nxc1 Bxf3 24. gxf3 Nd7 25. Nd3 Kf8 26. Kf1 Ke7 27. Ke2 Kd6 28. f4 g6 29. Ke3 f6 30. Kf3 Nb8 31. Ke3 b6 32. Nb2 Nc6 33. Na4 Kc7 34. Nc3 Ne7 35. Kd3 Kc6 36. Ne2 Nf5 37. Ng3 Nh4 38. h3 Ng2 39. Ne2 Kd6 40. Kc3 Ke6 41. Kb4 Ne1 42. Kc3 Kf5 43. Kd2 Ng2 44. Nc3 Nxf4 45. Na4 b5 46. Nc5 Nxh3 47. Ke3 Nf4 48. Nxa6 Ng2+ 49. Ke2 Ke4 50. Nc7 Nf4+ 51. Kd2 Kxd4 52. Nxb5+ Kc5 53. Nc7 h5 54. b4+ Kc6 55. Ne8 f5 56. Ke3 Ng2+ 57. Ke2 h4 58. Kf1 Nf4 59. Nf6 h3 60. Nh7 0-1

[Event "GRE-ch South U16"]
[Site "Athens"]
[Date "2020.08.31"]
[Round "6"]
[White "Sakkas, Konstantinos"]
[Black "Kazakos, Markos"]
[Result "0-1"]
[ECO "D85"]
[WhiteElo "1764"]
[BlackElo "2161"]
[PlyCount "100"]
[EventDate "2020.08.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Qd2 Qa5 9. Rc1 0-0 10. Nf3 Nd7 11. Bd3 b6 12. d5 Ba6 13. Bxa6 Qxa6 14. c4 b5 15. Qe2 b4 16. 0-0 Rac8 17. Qc2 Nb6 18. Qb3 Qa4 19. Nd2 a5 20. f4 Qxb3 21. Nxb3 Na4 22. e5 f6 23. Nxa5 fxe5 24. Nc6 Rxc6 25. dxc6 Rc8 26. Rcd1 Kf7 27. fxe5+ Ke6 28. Rd5 Rxc6 29. h4 Bxe5 30. Re1 Bc3 31. Re2 Kf7 32. Bg5 Bf6 33. Rf2 Nb6 34. Rd1 Nxc4 35. Bxf6 exf6 36. Rd7+ Ke6 37. Rxh7 Rd6 38. Rc7 Kd5 39. Rf3 Ne5 40. Rf1 Nd3 41. g4 Ra6 42. h5 gxh5 43. gxh5 Rxa2 44. h6 b3 45. h7 Ra8 46. Rg7 Rh8 47. Rxf6 b2 48. Rb7 Rxh7 49. Rb3 c4 50. Rfb6 Ke5 0-1

[Event "GRE-ch South U16"]
[Site "Athens"]
[Date "2020.08.31"]
[Round "5"]
[White "Tzagarakis, Panagiotis"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "B48"]
[WhiteElo "1952"]
[BlackElo "1764"]
[PlyCount "71"]
[EventDate "2020.08.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Nxc6 Qxc6 8. Bd3 Nf6 9. 0-0 d6 10. f4 Be7 11. Qf3 0-0 12. Rae1 e5 13. f5 b5 14. Nd5 Bd8 15. Bg5 Qc5+ 16. Be3 Qc6 17. Kh1 Qd7 18. h4 Nxd5 19. exd5 f6 20. g4 h6 21. Re2 Bb7 22. Be4 Rc8 23. g5 fxg5 24. hxg5 Bxg5 25. Bxg5 hxg5 26. Rh2 Rf6 27. Qh5 Rh6 28. Qxg5 Rxh2+ 29. Kxh2 Rc4 30. f6 Rxe4 31. f7+ Kf8 32. Qxg7+ Kxg7 33. f8Q+ Kg6 34. Rf6+ Kg5 35. Qh6+ Kg4 36. Qh3+ 1-0

[Event "GRE-ch South U16"]
[Site "Athens"]
[Date "2020.08.30"]
[Round "4"]
[White "Sakkas, Konstantinos"]
[Black "Koukouves, Vlasios"]
[Result "1-0"]
[ECO "E09"]
[WhiteElo "1764"]
[BlackElo "1631"]
[PlyCount "93"]
[EventDate "2020.08.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 0-0 6. 0-0 c6 7. Qc2 Nbd7 8. b3 b6 9. Bb2 Bb7 10. Nbd2 Rc8 11. e4 dxe4 12. Nxe4 c5 13. Nxf6+ Nxf6 14. Rfd1 Qc7 15. dxc5 bxc5 16. Ng5 h6 17. Bxf6 hxg5 18. Bxe7 Qxe7 19. Bxb7 Qxb7 20. Qd2 Qe7 21. Qd7 Rfe8 22. Qxe7 Rxe7 23. Rd6 Kf8 24. Rad1 Ke8 25. Kg2 f5 26. h4 gxh4 27. gxh4 Rcc7 28. Kg3 Kf7 29. Kf4 Kf6 30. h5 g5+ 31. hxg6 Rg7 32. Rg1 a5 33. Re1 Rge7 34. Re5 a4 35. Rxf5+ Kxg6 36. Ke5 axb3 37. axb3 Rb7 38. Rf6+ Kg7 39. Rdxe6 Rxe6+ 40. Rxe6 Kf7 41. Rd6 Rxb3 42. Kd5 Rf3 43. Kxc5 Rxf2 44. Kc6 Ke7 45. Rd3 Rf6+ 46. Kc7 Rf5 47. Re3+ 1-0

[Event "GRE-ch South U16"]
[Site "Athens"]
[Date "2020.08.29"]
[Round "3"]
[White "Christodoulou, Panormitis"]
[Black "Sakkas, Konstantinos"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "1698"]
[BlackElo "1764"]
[PlyCount "146"]
[EventDate "2020.08.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. c3 Nge7 5. d4 cxd4 6. cxd4 d5 7. e5 Ng6 8. a3 Be7 9. Nc3 0-0 10. h4 h6 11. h5 Nh4 12. Nxh4 Bxh4 13. Qg4 Bg5 14. Bxg5 Qxg5 15. Qxg5 hxg5 16. 0-0-0 f6 17. exf6 Rxf6 18. f3 a6 19. Bxc6 bxc6 20. Na4 Kf7 21. Nc5 a5 22. Kb1 a4 23. Rc1 Rf4 24. Rhd1 Ke7 25. Rc3 Kd6 26. Re3 g4 27. fxg4 Rxg4 28. g3 Bd7 29. Kc2 Rh8 30. Nxa4 Rxh5 31. Nb6 Rh3 32. Nxd7 Kxd7 33. Rdd3 Rh2+ 34. Kc3 Rh1 35. Kd2 Kd6 36. Kc2 Rh2+ 37. Kc3 Re4 38. Kb3 e5 39. dxe5+ Kxe5 40. Rf3 c5 41. Rd1 c4+ 42. Kb4 Kd6 43. Rb1 Re8 44. b3 Rc2 45. a4 Ra2 46. Kc3 Rb8 47. Rf7 Ra3 48. Rxg7 Raxb3+ 49. Rxb3 Rxb3+ 50. Kc2 Ra3 51. g4 Rxa4 52. g5 Ra3 53. Rg8 Kc5 54. g6 Kd4 55. g7 Ra2+ 56. Kc1 Rg2 57. Kb1 c3 58. Ka1 Kd3 59. Rd8 Rxg7 60. Rxd5+ Kc2 61. Ra5 Rd7 62. Ka2 Rb7 63. Ra8 Rb6 64. Ra7 Rd6 65. Ra8 Kd2 66. Rh8 c2 67. Rh2+ Kc3 68. Rh3+ Rd3 69. Rh1 Rd1 70. Rh3+ Kd4 71. Rh4+ Ke5 72. Rc4 c1Q 73. Rc3 Qd2+ 0-1

[Event "GRE-ch South U16"]
[Site "Athens"]
[Date "2020.08.29"]
[Round "2"]
[White "Sakkas, Konstantinos"]
[Black "Sidiropoulos, Vasilis"]
[Result "1/2-1/2"]
[ECO "A60"]
[WhiteElo "1764"]
[BlackElo "1560"]
[PlyCount "106"]
[EventDate "2020.08.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. e4 0-0 9. Nge2 Re8 10. 0-0 a6 11. a4 Nbd7 12. Bg5 Rb8 13. a5 b5 14. axb6 Qxb6 15. Ra2 Ne5 16. Nc1 Bg4 17. Qa4 Nf3+ 18. Bxf3 Bxf3 19. Bxf6 Bxf6 20. Qxa6 Bxc3 21. bxc3 Qd8 22. Re1 f5 23. e5 Bxd5 24. Rd2 Rb6 25. Qd3 Bf7 26. c4 Qc7 27. f4 dxe5 28. fxe5 Rbe6 29. Rde2 Rxe5 30. Rxe5 Rxe5 31. Rxe5 Qxe5 32. Nb3 Kg7 33. Nd2 h6 34. Nf3 Qa1+ 35. Kf2 Qa2+ 36. Ke3 Qxc4 37. Qxc4 Bxc4 38. Ne5 Be6 39. Nd3 c4 40. Nf4 Bf7 41. Kd4 Kf6 42. Ne2 g5 43. Nc3 h5 44. Ne2 h4 45. gxh4 gxh4 46. Ng1 Be6 47. Nf3 h3 48. Ng1 f4 49. Ke4 Bd7 50. Kxf4 c3 51. Ke3 Bf5 52. Nxh3 Bxh3 53. Kd4 Ke6 1/2-1/2

[Event "GRE-ch South U16"]
[Site "Athens"]
[Date "2020.08.28"]
[Round "1"]
[White "Stamatiou, Rodolfos"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "A11"]
[WhiteElo "2079"]
[BlackElo "1764"]
[PlyCount "37"]
[EventDate "2020.08.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c6 3. Nc3 d5 4. e3 e6 5. b3 Nbd7 6. Bb2 Be7 7. Qc2 0-0 8. d4 b6 9. Bd3 h6 10. 0-0 Bb7 11. h3 Rc8 12. Rad1 Qc7 13. Qe2 dxc4 14. bxc4 c5 15. d5 e5 16. d6 Bxd6 17. Nb5 Qb8 18. Nxd6 e4 19. Nxe4 1-0

[Event "GRE-ch U14"]
[Site "Rio Achaia"]
[Date "2018.07.09"]
[Round "9"]
[White "Galanakis, Nikolaos"]
[Black "Sakkas, Konstantinos"]
[Result "0-1"]
[ECO "B48"]
[WhiteElo "1579"]
[BlackElo "1619"]
[PlyCount "62"]
[EventDate "2018.07.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. f4 a6 7. Be3 b5 8. a3 Bb7 9. Be2 Nf6 10. Bf3 b4 11. axb4 Bxb4 12. 0-0 Bxc3 13. bxc3 0-0 14. Rb1 Nxd4 15. Qxd4 d5 16. e5 Ne4 17. Bxe4 dxe4 18. Rb6 Bd5 19. Rfb1 Rfb8 20. f5 Rxb6 21. Rxb6 a5 22. f6 a4 23. Rb4 a3 24. Ra4 Qb7 25. Rxa8+ Qxa8 26. c4 a2 27. Qa1 Bxc4 28. Bd4 e3 29. Qe1 e2 30. Kf2 Qe4 31. Qc3 e1Q+ 0-1

[Event "GRE-ch U14"]
[Site "Rio Achaia"]
[Date "2018.07.08"]
[Round "8"]
[White "Sakkas, Konstantinos"]
[Black "Stefanou, Dimitrios"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "1619"]
[BlackElo "1824"]
[PlyCount "69"]
[EventDate "2018.07.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. e3 g6 4. b3 Bg7 5. Bb2 0-0 6. dxc5 Qa5+ 7. c3 Qxc5 8. c4 d6 9. Be2 b6 10. 0-0 Bb7 11. Nd4 Nbd7 12. Bf3 Bxf3 13. Nxf3 Qc7 14. Nc3 Qb7 15. Qe2 Nc5 16. Rfd1 Nce4 17. Nxe4 Nxe4 18. Bxg7 Kxg7 19. Nd4 Kg8 20. Rac1 a6 21. Qf3 Rab8 22. Ne2 b5 23. Ng3 Nxg3 24. hxg3 Qxf3 25. gxf3 Rfc8 26. cxb5 axb5 27. Kf1 b4 28. Ke2 h5 29. g4 Kg7 30. g5 Ra8 31. Rxc8 Rxc8 32. Rd2 f6 33. f4 Kf7 34. Rd4 Rb8 35. Kf3 1/2-1/2

[Event "GRE-ch U14"]
[Site "Rio Achaia"]
[Date "2018.07.07"]
[Round "7"]
[White "Papagiannis, Asterios"]
[Black "Sakkas, Konstantinos"]
[Result "1/2-1/2"]
[ECO "D10"]
[WhiteElo "1869"]
[BlackElo "1619"]
[PlyCount "60"]
[EventDate "2018.07.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nc6 5. e3 Bf5 6. Nc3 e6 7. Rc1 Rc8 8. a3 Nf6 9. Nf3 Bd6 10. Bg5 0-0 11. Bd3 Bg6 12. 0-0 a6 13. Bxg6 hxg6 14. Nd2 Na5 15. e4 dxe4 16. Ndxe4 Be7 17. Nxf6+ Bxf6 18. Bxf6 Qxf6 19. Ne4 Qe7 20. Rxc8 Rxc8 21. d5 exd5 22. Qxd5 Nc6 23. Nc3 Rd8 24. Qe4 Qxe4 25. Nxe4 Nd4 26. Nc3 Kf8 27. Rd1 Ne2+ 28. Kf1 Rxd1+ 29. Nxd1 Nf4 30. g3 Ne6 1/2-1/2

[Event "GRE-ch U14"]
[Site "Rio Achaia"]
[Date "2018.07.06"]
[Round "5"]
[White "Abelakiotis, Stavros"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "2029"]
[BlackElo "1619"]
[PlyCount "71"]
[EventDate "2018.07.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. g3 Nc6 4. Bg2 d5 5. exd5 exd5 6. d4 cxd4 7. Nxd4 Nxd4 8. Qxd4 Be6 9. 0-0 Nf6 10. Nd2 Be7 11. Nb3 0-0 12. c3 Qd7 13. Re1 Rfe8 14. Bf4 b6 15. a4 Bh3 16. Bh1 Rac8 17. Qd2 Bc5 18. Nxc5 bxc5 19. Re5 Be6 20. Bg5 Ng4 21. Ree1 h6 22. Bf4 c4 23. Qd4 Qb7 24. Re2 Nf6 25. Rae1 Qb6 26. Be5 Qxd4 27. Bxd4 a6 28. Bxf6 gxf6 29. Bxd5 Kf8 30. Bxe6 fxe6 31. Rxe6 Kf7 32. Rxe8 Rxe8 33. Rxe8 Kxe8 34. Kg2 Ke7 35. Kf3 Ke6 36. Ke4 1-0

[Event "GRE-ch U14"]
[Site "Rio Achaia"]
[Date "2018.07.06"]
[Round "6"]
[White "Sakkas, Konstantinos"]
[Black "Davillas, Konstantinos"]
[Result "1-0"]
[ECO "E01"]
[WhiteElo "1619"]
[BlackElo "1454"]
[PlyCount "65"]
[EventDate "2018.07.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Bb4+ 5. Bd2 Bd6 6. Bg2 c6 7. b3 Ne4 8. 0-0 0-0 9. Nc3 f5 10. c5 Bc7 11. b4 Nd7 12. a4 Qe7 13. Nxe4 fxe4 14. Bg5 Qf7 15. Nd2 e5 16. Be3 exd4 17. Bxd4 Be5 18. Nb3 Qe7 19. Rc1 Bxd4 20. Qxd4 Ne5 21. f3 exf3 22. exf3 Nc4 23. Rfe1 Qf7 24. f4 Bf5 25. Bf1 Rfe8 26. Bxc4 dxc4 27. Nd2 Red8 28. Qe3 Rd3 29. Qe2 c3 30. Nf3 Bg4 31. Qxd3 Qf6 32. Qxc3 Bxf3 33. Qxf3 1-0

[Event "GRE-ch U14"]
[Site "Rio Achaia"]
[Date "2018.07.05"]
[Round "4"]
[White "Sakkas, Konstantinos"]
[Black "Michalis, Vasileios"]
[Result "1-0"]
[ECO "E17"]
[WhiteElo "1619"]
[BlackElo "1421"]
[PlyCount "51"]
[EventDate "2018.07.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 c5 4. e3 d5 5. Bg2 b6 6. Nf3 Bb7 7. 0-0 Be7 8. cxd5 exd5 9. Nc3 0-0 10. b3 Nbd7 11. Bb2 Rc8 12. Rc1 Ba6 13. Re1 c4 14. Ne5 Bb4 15. bxc4 Bxc4 16. Nxc4 Rxc4 17. Qb3 Bxc3 18. Rxc3 Rxc3 19. Bxc3 Nb8 20. Bb4 Re8 21. Rc1 Na6 22. Ba3 Ne4 23. Bxe4 Rxe4 24. Qa4 Nc7 25. Qxa7 Nb5 26. Qxb6 1-0

[Event "GRE-ch U14"]
[Site "Rio Achaia"]
[Date "2018.07.04"]
[Round "3"]
[White "Georgiou, Anastasios"]
[Black "Sakkas, Konstantinos"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "1209"]
[BlackElo "1619"]
[PlyCount "76"]
[EventDate "2018.07.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. 0-0 Be7 8. d3 0-0 9. Be3 Re8 10. Rc1 Bf8 11. Re1 Nd4 12. Bxd4 exd4 13. Nb5 c5 14. Nd2 Rb8 15. Ne4 a6 16. Na3 Nd7 17. Qb3 b5 18. Nc2 Bb7 19. Na1 Re5 20. Qd1 Qb6 21. Nb3 Bxe4 22. Bxe4 c4 23. Nd2 Bb4 24. Bf3 c3 25. bxc3 dxc3 26. Ne4 c2 27. Qxc2 Bxe1 28. Bg4 Rxe4 29. Rxe1 Rxg4 30. e3 Qc5 31. Qb2 Rc8 32. Rf1 Ne5 33. d4 Nf3+ 34. Kg2 Qc6 35. Kh3 Rg6 36. g4 Ng5+ 37. Kh4 Rh6+ 38. Kxg5 Qf6# 0-1

[Event "GRE-ch U14"]
[Site "Rio Achaia"]
[Date "2018.07.04"]
[Round "2"]
[White "Sakkas, Konstantinos"]
[Black "Krallis, Christos"]
[Result "0-1"]
[ECO "E11"]
[WhiteElo "1619"]
[BlackElo "2132"]
[PlyCount "84"]
[EventDate "2018.07.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 a5 5. Bg2 d6 6. Nf3 Nbd7 7. Qc2 e5 8. 0-0 0-0 9. Rd1 Qe7 10. Bg5 exd4 11. Nxd4 h6 12. Bxf6 Nxf6 13. a3 Bc5 14. e3 Bg4 15. Rc1 c6 16. Nc3 Qe5 17. Qd3 Rfe8 18. Nxc6 bxc6 19. Bxc6 Bf5 20. Qe2 Ne4 21. Nd5 Rab8 22. Bxe8 Rxb2 23. Bxf7+ Kxf7 24. Qh5+ g6 25. Qxh6 Nxf2 26. Rf1 Ng4 27. Qh7+ Kf8 28. Rae1 Rxh2 29. Qxh2 Nxh2 30. Kxh2 Kg7 31. Rf2 Be4 32. Nf4 g5 33. Nh3 g4 34. Nf4 Bf3 35. Ng2 Qc3 36. Rb1 Bxe3 37. Nxe3 Qxe3 38. Rfb2 Qh6+ 39. Kg1 Qh1+ 40. Kf2 Qg2+ 41. Ke3 Qxg3 42. Rb5 Bc6+ 0-1

[Event "GRE-ch U14"]
[Site "Rio Achaia"]
[Date "2018.07.03"]
[Round "1"]
[White "Garoufalis, Athanasios"]
[Black "Sakkas, Konstantinos"]
[Result "0-1"]
[ECO "B40"]
[WhiteElo "1151"]
[BlackElo "1619"]
[PlyCount "54"]
[EventDate "2018.07.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 Nc6 5. Ne2 Nf6 6. d3 Be7 7. Bg2 0-0 8. 0-0 d5 9. e5 Nd7 10. Nc3 Ndxe5 11. Nxe5 Nxe5 12. f4 Nc6 13. f5 d4 14. Bxc6 dxc3 15. Be4 Qd4+ 16. Kh1 cxb2 17. Bxb2 Qxb2 18. Rb1 Qd4 19. Qf3 exf5 20. Bxb7 Bxb7 21. Rxb7 Bf6 22. Qxf5 Rae8 23. Rf4 Re1+ 24. Rf1 Rxf1+ 25. Qxf1 Re8 26. Rb6 Qd5+ 27. Qg2 Re1# 0-1

[Event "GRE-ch Schools Gymnasia-B 30th"]
[Site "Peristeri"]
[Date "2018.04.02"]
[Round "9"]
[White "Goutis, Panagiotis"]
[Black "Sakkas, Konstantinos"]
[Result "1/2-1/2"]
[ECO "D36"]
[WhiteElo "1583"]
[BlackElo "1626"]
[PlyCount "99"]
[EventDate "2018.04.01"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 0-0 7. Bd3 h6 8. Bh4 c6 9. Qc2 Be6 10. Nge2 Nbd7 11. 0-0 Rc8 12. f3 c5 13. Bf2 cxd4 14. exd4 Bb4 15. Qb3 Bxc3 16. Nxc3 Qb6 17. Qa3 a6 18. Rac1 Rc6 19. Na4 Qc7 20. Be3 b5 21. Rxc6 Qxc6 22. Rc1 Qb7 23. Nc5 Nxc5 24. Rxc5 Nd7 25. Rc1 Nb6 26. b3 Rc8 27. Rxc8+ Nxc8 28. Qc5 Ne7 29. Kf2 Nf5 30. Bxf5 Bxf5 31. Bf4 Be6 32. b4 Qc8 33. Qxc8+ Bxc8 34. a3 f6 35. Bd6 Kf7 36. Ke3 g6 37. f4 g5 38. g3 Kg6 39. Kf3 Bf5 40. fxg5 fxg5 41. h4 Be4+ 42. Ke3 gxh4 43. gxh4 Kh5 44. Bf4 Kg6 45. Bd6 Kf5 46. Bf4 h5 47. Bg5 Kg4 48. Bf6 Kg3 49. Bg5 Kg4 50. Bf6 1/2-1/2

[Event "GRE-ch Schools Gymnasia-B 30th"]
[Site "Peristeri"]
[Date "2018.04.02"]
[Round "7"]
[White "Minas, Panagiotis"]
[Black "Sakkas, Konstantinos"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "1361"]
[BlackElo "1626"]
[PlyCount "89"]
[EventDate "2018.04.01"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nc6 5. c4 Nf6 6. Nc3 Bb4 7. Be2 0-0 8. 0-0 Bg4 9. a3 Be7 10. Be3 dxc4 11. Bxc4 Bxf3 12. Qxf3 Nxd4 13. Qxb7 Nf5 14. Rad1 Qc8 15. Qxc8 Rfxc8 16. Rfe1 Ng4 17. Nd5 Bd6 18. h3 Nfxe3 19. Nxe3 Nxe3 20. Rxe3 Re8 21. Rde1 Kf8 22. Rxe8+ Rxe8 23. Rxe8+ Kxe8 24. Kf1 Ke7 25. Ke2 f5 26. f3 f4 27. Kd3 Kf6 28. Ke2 Kg5 29. Kf2 Bc5+ 30. Kf1 h6 31. a4 Kf6 32. Ke2 Ke5 33. Kd3 Bd6 34. b3 Bc5 35. Bg8 Kf5 36. Ke2 Kg5 37. Bd5 Kh4 38. Kf1 g5 39. Bf7 h5 40. Be6 Kg3 41. Bf5 Bd6 42. Bd7 Bb4 43. Be6 a5 44. Bd7 c5 45. Be6 1/2-1/2

[Event "GRE-ch Schools Gymnasia-B 30th"]
[Site "Peristeri"]
[Date "2018.04.02"]
[Round "8"]
[White "Sakkas, Konstantinos"]
[Black "Kokkalis, Grigorios"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "1626"]
[BlackElo "1511"]
[PlyCount "75"]
[EventDate "2018.04.01"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Qe7 5. Bg2 Nc6 6. Nf3 d5 7. 0-0 Bxd2 8. Qxd2 0-0 9. e3 Ne4 10. Qe2 Bd7 11. Nfd2 Nf6 12. Nc3 dxc4 13. Nxc4 Rab8 14. Nd2 Nd8 15. Nde4 Bc6 16. Nxf6+ Qxf6 17. Ne4 Qe7 18. Nc5 Bxg2 19. Kxg2 Nc6 20. Rac1 Rfd8 21. Qf3 e5 22. Nxb7 Rxb7 23. Qxc6 Rxb2 24. Qxc7 Qxc7 25. Rxc7 Rxa2 26. dxe5 h6 27. Rb1 Rdd2 28. Rb8+ Kh7 29. Rxf7 Ra6 30. Rbb7 Rg6 31. Rxa7 Rg5 32. e6 Re5 33. Rxg7+ Kh8 34. Rh7+ Kg8 35. Rag7+ Kf8 36. e7+ Ke8 37. Rh8+ Kd7 38. e8Q+ 1-0

[Event "GRE-ch Schools Gymnasia-B 30th"]
[Site "Peristeri"]
[Date "2018.04.01"]
[Round "3"]
[White "Abelakiotis, Stavros"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "C07"]
[WhiteElo "2067"]
[BlackElo "1626"]
[PlyCount "121"]
[EventDate "2018.04.01"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nc6 5. exd5 Qxd5 6. Bc4 Qd8 7. Nb3 cxd4 8. 0-0 Nf6 9. Nbxd4 Nxd4 10. Nxd4 a6 11. Bb3 Be7 12. c3 0-0 13. Bf4 Bd7 14. Qf3 Qb6 15. h3 Bc6 16. Nxc6 Qxc6 17. Qxc6 bxc6 18. Rad1 Rac8 19. Bd6 Bxd6 20. Rxd6 Ne4 21. Rd4 Nc5 22. Bc2 Rfd8 23. Rfd1 Nb7 24. Be4 e5 25. R4d2 Rxd2 26. Rxd2 Rd8 27. Rxd8+ Nxd8 28. Kf1 g6 29. Ke2 f5 30. Bd3 a5 31. b4 axb4 32. cxb4 Kf8 33. Kd2 Ke7 34. Kc3 Kd6 35. Kc4 Nb7 36. a4 c5 37. a5 cxb4 38. Kxb4 Nxa5 39. Kxa5 Kd5 40. Kb4 Kd4 41. Be2 e4 42. Kb3 e3 43. f4 Ke4 44. g3 g5 45. fxg5 f4 46. gxf4 Kxf4 47. h4 Kf5 48. Bh5 Kf4 49. Be2 Kf5 50. Kc3 h6 51. Bd3+ Ke6 52. g6 Kf6 53. Kc2 Kg7 54. Kd1 Kf6 55. Ke2 Kg7 56. Kxe3 Kf6 57. Kf4 Kg7 58. Kf5 h5 59. Kg5 Kh8 60. Kh6 Kg8 61. Bc4+ 1-0

[Event "GRE-ch Schools Gymnasia-B 30th"]
[Site "Peristeri"]
[Date "2018.04.01"]
[Round "5"]
[White "Chatzieleftheriou, Andreas"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "1935"]
[BlackElo "1626"]
[PlyCount "125"]
[EventDate "2018.04.01"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Bd3 dxe4 4. Bxe4 Nf6 5. Bf3 c5 6. Ne2 Nc6 7. c3 Be7 8. 0-0 0-0 9. Be3 Qb6 10. Qb3 Qxb3 11. axb3 cxd4 12. Nxd4 Nd5 13. Bxd5 exd5 14. Nd2 Bf6 15. N2f3 Bg4 16. h3 Bxf3 17. Nxf3 b6 18. b4 Rad8 19. Rfd1 Rd7 20. Rd2 Rfd8 21. Rad1 Ne5 22. Nd4 Nc4 23. Re2 Re8 24. Bc1 Rxe2 25. Nxe2 g6 26. f4 Re7 27. Kf2 Rd7 28. Kf3 Kf8 29. b3 Nd6 30. Rxd5 Ke8 31. Be3 Nf5 32. Rxd7 Kxd7 33. b5 Nxe3 34. Kxe3 Kd6 35. b4 Kd5 36. Kd3 Bg7 37. g4 f5 38. gxf5 gxf5 39. c4+ Kd6 40. Nd4 Bf8 41. Nxf5+ Ke6 42. Nd4+ Kf6 43. Ke4 Bxb4 44. Nc6 Bc5 45. Nxa7 Bg1 46. Nc6 Bc5 47. Nd4 Ba3 48. Nc2 Bc5 49. Ne3 Ke6 50. f5+ Kf6 51. Nd5+ Kg5 52. f6 Kh4 53. f7 Kxh3 54. Nxb6 Kg4 55. Nd7 Bd6 56. c5 Be7 57. f8Q Bxf8 58. Nxf8 h5 59. c6 h4 60. c7 Kg3 61. c8Q h3 62. Qxh3+ Kxh3 63. b6 1-0

[Event "GRE-ch Schools Gymnasia-B 30th"]
[Site "Peristeri"]
[Date "2018.04.01"]
[Round "6"]
[White "Sakkas, Konstantinos"]
[Black "Batsis, Lazaros"]
[Result "1-0"]
[ECO "A50"]
[WhiteElo "1626"]
[BlackElo "1161"]
[PlyCount "77"]
[EventDate "2018.04.01"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 Nc6 3. Nc3 e5 4. d5 Ne7 5. e4 Ng6 6. Be2 Bb4 7. Qc2 0-0 8. Nf3 d6 9. 0-0 Bd7 10. Be3 a6 11. a3 Bxc3 12. bxc3 b6 13. Nd2 Re8 14. Rab1 Ng4 15. Bxg4 Bxg4 16. f3 Bd7 17. f4 exf4 18. Bxf4 Nxf4 19. Rxf4 Qg5 20. Rbf1 f6 21. R4f3 Qg6 22. Rg3 Qf7 23. Qd3 b5 24. cxb5 axb5 25. c4 bxc4 26. Qxc4 Rec8 27. Qd4 Ra4 28. Qxf6 Qxf6 29. Rxf6 Rd4 30. Rf2 Bb5 31. h3 Be8 32. Rc3 Bg6 33. Re2 Kf7 34. Nc4 Re8 35. Nd2 Re7 36. Rb3 Bxe4 37. Rbe3 Rxd2 38. Rxd2 Bxd5 39. Rxe7+ 1-0

[Event "GRE-ch Schools Gymnasia-B 30th"]
[Site "Peristeri"]
[Date "2018.04.01"]
[Round "4"]
[White "Sakkas, Konstantinos"]
[Black "Damilakos, Ilias"]
[Result "1-0"]
[ECO "A90"]
[WhiteElo "1626"]
[BlackElo "1324"]
[PlyCount "48"]
[EventDate "2018.04.01"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 Nf6 3. c4 e6 4. g3 d5 5. Bg2 c6 6. 0-0 Bd6 7. cxd5 exd5 8. Nc3 0-0 9. Bg5 h6 10. Bxf6 Qxf6 11. e3 Be6 12. Qb3 Qe7 13. Nh4 Qf7 14. Ne2 Bd7 15. Qxb7 Bc8 16. Qxa8 Qc7 17. Rac1 Qb6 18. Bxd5+ Be6 19. Bxe6+ Kh7 20. Bxf5+ Kg8 21. Be4 Rc8 22. Rxc6 Rxc6 23. Bxc6 Qxc6 24. Qxc6 Nxc6 1-0

[Event "EU-ch U14 27th"]
[Site "Mamaia"]
[Date "2017.09.14"]
[Round "9"]
[White "Ignatov, Georgi"]
[Black "Sakkas, Konstantinos"]
[Result "1/2-1/2"]
[ECO "C02"]
[WhiteElo "1793"]
[BlackElo "1467"]
[PlyCount "61"]
[EventDate "2017.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ROU"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. c3 e6 4. d4 d5 5. e5 cxd4 6. cxd4 Bb4+ 7. Nc3 Nge7 8. a3 Ba5 9. Bd3 h6 10. h4 Nf5 11. Bc2 Bb6 12. Ne2 Qc7 13. g4 Nfxd4 14. Nexd4 Bxd4 15. Nxd4 Nxd4 16. Ba4+ Nc6 17. f4 Bd7 18. Bd2 Qb6 19. Qb3 Qxb3 20. Bxb3 Nd4 21. Bd1 Rc8 22. Rh3 Nc2+ 23. Bxc2 Rxc2 24. Rc3 Rxc3 25. bxc3 0-0 26. Be3 Rc8 27. Bd4 a6 28. Rb1 b5 29. Kd2 Rc4 30. Rb4 Bc6 31. Ke3 1/2-1/2

[Event "EU-ch U14 27th"]
[Site "Mamaia"]
[Date "2017.09.12"]
[Round "7"]
[White "Hechl, Fabian"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "1912"]
[BlackElo "1467"]
[PlyCount "43"]
[EventDate "2017.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ROU"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 0-0 8. Be2 d6 9. Qd2 Bd7 10. f3 Nxd4 11. Bxd4 Bc6 12. h4 Nh5 13. Bxg7 Kxg7 14. g4 Ng3 15. Rh3 Nxe2 16. Kxe2 h6 17. f4 e6 18. f5 g5 19. Rah1 Rh8 20. hxg5 Qxg5 21. Qxg5+ hxg5 22. f6+ 1-0

[Event "EU-ch U14 27th"]
[Site "Mamaia"]
[Date "2017.09.09"]
[Round "5"]
[White "Secrieru, Andrei Cristian"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "1853"]
[BlackElo "1467"]
[PlyCount "59"]
[EventDate "2017.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ROU"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Be2 Bd6 6. 0-0 Nbd7 7. b3 0-0 8. Bb2 Qe7 9. Ne5 a5 10. Nd2 c5 11. Ndf3 h6 12. Rc1 Re8 13. Kh1 Nb8 14. Nd3 cxd4 15. Nxd4 Bd7 16. Nf3 Nc6 17. c5 Bc7 18. Nfe5 Nxe5 19. Bxe5 Bxe5 20. Nxe5 Rac8 21. Nd3 Ne4 22. Qe1 Nxc5 23. Qxa5 Nxd3 24. Bxd3 Qf6 25. Qd2 Rxc1 26. Rxc1 Rc8 27. Kg1 Rxc1+ 28. Qxc1 d4 29. Qc7 Bc6 30. Qb8+ 1-0

[Event "EU-ch U14 27th"]
[Site "Mamaia"]
[Date "2017.09.08"]
[Round "4"]
[White "Sakkas, Konstantinos"]
[Black "Liveyns, Rune"]
[Result "1-0"]
[ECO "E73"]
[WhiteElo "1467"]
[BlackElo "1767"]
[PlyCount "61"]
[EventDate "2017.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ROU"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 Na6 7. Qd2 c6 8. Nf3 e5 9. Rd1 exd4 10. Qxd4 Be6 11. Qxd6 Qb6 12. Qd2 Nc5 13. Qc2 Ng4 14. 0-0 h6 15. Be7 Rfe8 16. Bd6 Nf6 17. Nd4 Ncxe4 18. Nxe4 Nxe4 19. c5 Qd8 20. Nxe6 Rxe6 21. Bc4 Re8 22. Qb3 Qd7 23. Be5 Qe7 24. Bd6 Nxd6 25. cxd6 Qd7 26. Rfe1 b5 27. Be2 h5 28. Qd3 Rad8 29. Bf1 Rxe1 30. Rxe1 Qxd6 31. Re8+ 1-0

[Event "EU-ch U14 27th"]
[Site "Mamaia"]
[Date "2017.09.07"]
[Round "3"]
[White "Pobor, Milo"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "B31"]
[WhiteElo "1877"]
[BlackElo "1467"]
[PlyCount "131"]
[EventDate "2017.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ROU"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Bg7 5. Re1 Nf6 6. e5 Nd5 7. Nc3 Nc7 8. Bxc6 dxc6 9. d3 0-0 10. h3 Ne6 11. Ne4 b6 12. Neg5 Nd4 13. Nxd4 cxd4 14. e6 fxe6 15. Nxe6 Bxe6 16. Rxe6 Qd7 17. Qe2 Rae8 18. Bg5 Bf6 19. Bh6 Bg7 20. Bxg7 Kxg7 21. Re1 Rf7 22. Qe4 c5 23. h4 Qc7 24. h5 gxh5 25. Qh4 Qf4 26. Qxf4 Rxf4 27. Rxe7+ Rxe7 28. Rxe7+ Rf7 29. Re5 Kg6 30. g3 Rf5 31. Re4 a6 32. Kg2 Kf6 33. Re8 Re5 34. Rb8 b5 35. Ra8 Re6 36. Rc8 Re5 37. Rc6+ Kf5 38. Rxa6 Re2 39. Ra5 Rxc2 40. Rxb5 Ke6 41. a3 Kd6 42. Kf3 Rd2 43. Rb3 Kd5 44. a4 Rd1 45. a5 Ra1 46. Ra3 Re1 47. a6 Re8 48. a7 Ra8 49. Ke2 Kc6 50. Kd2 Kd5 51. Kc2 Kc6 52. Kb3 Kd5 53. Ra6 h6 54. f3 h4 55. gxh4 Ke5 56. Kc4 Kf4 57. Rf6+ Ke3 58. Rf7 Kf2 59. Kxc5 Ke3 60. Kb6 Kxd3 61. Kb7 Kc2 62. Kxa8 d3 63. Kb7 d2 64. Rd7 d1Q 65. Rxd1 Kxd1 66. a8Q 1-0

[Event "EU-ch U14 27th"]
[Site "Mamaia"]
[Date "2017.09.06"]
[Round "2"]
[White "Sakkas, Konstantinos"]
[Black "Kirilov, Ivaylo"]
[Result "0-1"]
[ECO "E73"]
[WhiteElo "1467"]
[BlackElo "1913"]
[PlyCount "94"]
[EventDate "2017.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ROU"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 c6 7. Qd2 a6 8. a4 a5 9. Nf3 Na6 10. 0-0 Nd7 11. h3 f6 12. Be3 e5 13. Rfd1 Qe7 14. dxe5 dxe5 15. Qd6 Re8 16. c5 Bf8 17. Qxe7 Bxe7 18. Bc4+ Kg7 19. Bxa6 Rxa6 20. Nd2 Bxc5 21. Bxc5 Nxc5 22. Nc4 Nb3 23. Ra3 Nd4 24. Nd6 Rd8 25. Nxc8 Rxc8 26. Raa1 Raa8 27. Kf1 Rd8 28. Rd3 Kf7 29. Rad1 Ke7 30. Ne2 Ne6 31. f3 Rxd3 32. Rxd3 Nc5 33. Rc3 Nxa4 34. Ra3 b5 35. b3 Nc5 36. b4 Nb7 37. bxa5 Rxa5 38. Rd3 Nd6 39. Nc3 Nc4 40. Ne2 Ra3 41. Rxa3 Nxa3 42. Nc3 Kd6 43. g3 Kc5 44. f4 b4 45. Na4+ Kb5 46. Nb2 c5 47. f5 c4 0-1

[Event "EU-ch U14 27th"]
[Site "Mamaia"]
[Date "2017.09.05"]
[Round "1"]
[White "Ingebretsen, Jens E"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "B31"]
[WhiteElo "2062"]
[BlackElo "1467"]
[PlyCount "66"]
[EventDate "2017.09.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ROU"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 bxc6 5. d3 Bg7 6. 0-0 Rb8 7. Nbd2 d6 8. e5 dxe5 9. Qe1 Qc7 10. Nc4 Bg4 11. Nfxe5 Nf6 12. Bf4 Nh5 13. Bd2 Be6 14. Ba5 Qc8 15. Qe3 Bxc4 16. Nxc4 0-0 17. Qxe7 Nf4 18. Bd2 Nxg2 19. Qg5 f5 20. Qxg2 f4 21. f3 Qc7 22. Bc3 Rf5 23. Bxg7 Qxg7 24. Rfe1 Qh6 25. Kh1 Rbf8 26. Qe2 g5 27. Qe6+ Qxe6 28. Rxe6 h5 29. Nd6 R5f6 30. Rxf6 Rxf6 31. Ne4 Rf5 32. Kg2 g4 33. fxg4 hxg4 1-0

[Event "Athens Siaperas Memorial 13th"]
[Site "Athens"]
[Date "2017.01.14"]
[Round "1"]
[White "Papahristoudis, Anastasios"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2042"]
[BlackElo "1586"]
[PlyCount "95"]
[EventDate "2017.02.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GRE"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Nxd4 6. Qxd4 b6 7. Bg5 Bb7 8. Nd5 Bxd5 9. cxd5 Be7 10. g3 0-0 11. Bg2 d6 12. 0-0 h6 13. Be3 Nd7 14. Qd2 Bf6 15. Rac1 Nc5 16. b4 Na6 17. a3 Qd7 18. Rc4 Qa4 19. Qd3 Qb5 20. Bxh6 Qd7 21. Bd2 b5 22. Rc2 g6 23. Rfc1 Rab8 24. Rc6 Rb6 25. Be3 Rxc6 26. dxc6 Qf5 27. Qxf5 gxf5 28. Bh3 Bb2 29. Rc2 Bxa3 30. Ra2 Nxb4 31. Rxa3 Nxc6 32. Rc3 Ne5 33. Rxc7 a6 34. Ra7 Rb8 35. Rxa6 b4 36. Rb6 Rxb6 37. Bxb6 Nc4 38. Bd4 f4 39. gxf4 Kh7 40. Bf5+ Kg8 41. h4 b3 42. h5 f6 43. Bxf6 Kf7 44. Bd4 b2 45. h6 b1Q+ 46. Bxb1 Ne5 47. fxe5 dxe5 48. Bxe5 1-0

[Event "Nikaia op 23rd"]
[Site "Nikaia"]
[Date "2015.08.29"]
[Round "3"]
[White "Kontopanagos, Ioannis"]
[Black "Sakkas, Konstantinos"]
[Result "1-0"]
[ECO "C62"]
[WhiteElo "1224"]
[BlackElo "1393"]
[PlyCount "62"]
[EventDate "2015.08.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GRE"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 exd4 5. Nxd4 Bd7 6. Nxc6 Bxc6 7. Bxc6+ bxc6 8. 0-0 Nf6 9. Bg5 Be7 10. Nc3 0-0 11. f4 h6 12. Bh4 Nxe4 13. Bxe7 Qxe7 14. Re1 Nxc3 15. Rxe7 Nxd1 16. Rxd1 Rfc8 17. Rde1 Kf8 18. Rd7 Re8 19. Rxe8+ Kxe8 20. Rxc7 c5 21. Kf2 Rb8 22. b3 Ra8 23. Ke3 a5 24. a4 Ra6 25. Ke4 g5 26. fxg5 hxg5 27. Kf5 Kf8 28. Kxg5 Kg7 29. h4 d5 30. h5 d4 31. Rxc5 f6+ 1-0

