[Event "Prague op-B 10th"]
[Site "Prague"]
[Date "2011.01.14"]
[Round "9"]
[White "Lehner, Martin"]
[Black "Matthew, Ian"]
[Result "0-1"]
[ECO "C00"]
[WhiteElo "1763"]
[PlyCount "46"]
[EventDate "2011.01.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 140 Extra"]
[Source "ChessBase"]
[SourceDate "2011.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2011.03.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. g3 d5 4. e5 Nc6 5. Bg2 Qc7 6. Qe2 Nge7 7. d3 Ng6 8. Bf4 Qb6 9. c3 Be7 10. 0-0 Nxf4 11. gxf4 f6 12. Na3 a6 13. c4 fxe5 14. cxd5 exd5 15. Nxe5 Nd4 16. Qd1 Qd6 17. Nc2 Nxc2 18. Qxc2 0-0 19. Qb3 Rxf4 20. Bxd5+ Kf8 21. Rae1 Rb4 22. Qd1 Qxd5 23. Qh5 Rg4+ 0-1

[Event "Oberwart op-B"]
[Site "Oberwart"]
[Date "2009.07.11"]
[Round "1"]
[White "Lehner, Martin"]
[Black "Kehl, Alexander"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1786"]
[PlyCount "62"]
[EventDate "2009.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Be3 e6 5. Ne2 c5 6. dxc5 Bxc5 7. Bxc5 Qa5+ 8. b4 Qd8 9. Nd4 Bg6 10. Nb5 Nc6 11. c4 Nge7 12. Bxe7 Qxe7 13. Nd6+ Kf8 14. a3 Nxe5 15. Nxb7 Qxb7 16. c5 a6 17. Qd4 Nc6 18. Qb2 Rb8 19. Nd2 e5 20. Be2 f6 21. f3 Nd4 22. Nb3 Nc2+ 23. Kd2 Nxa1 24. Rxa1 Qa8 25. a4 Rxb4 26. Qa3 Qb8 27. Na5 Rb2+ 28. Ke1 Rb1+ 29. Rxb1 Qxb1+ 30. Kf2 Kf7 31. c6 Qb6+ 0-1

[Event "Oberwart op-B"]
[Site "Oberwart"]
[Date "2007.07.08"]
[Round "2"]
[White "Meixner, Peter"]
[Black "Lehner, Martin"]
[Result "1/2-1/2"]
[ECO "D53"]
[BlackElo "1820"]
[PlyCount "61"]
[EventDate "2007.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "AUT"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Nf3 Nbd7 6. e3 c6 7. Rc1 Ne4 8. Bxe7 Qxe7 9. c5 e5 10. Be2 Nxc3 11. Rxc3 e4 12. Nd2 0-0 13. 0-0 f5 14. f4 Rf6 15. b4 b5 16. a4 a6 17. a5 Nf8 18. Rf2 Rh6 19. g3 g5 20. Rg2 g4 21. Bf1 Ra7 22. Rf2 Qe8 23. Rc2 Rg6 24. Nb3 h5 25. Rcd2 Rh7 26. Qc2 Rgh6 27. Rg2 h4 28. Kf2 hxg3+ 29. hxg3 Rh1 30. Ke1 Qh5 31. Rdf2 1/2-1/2

[Event "Leonding op 9th"]
[Site "Leonding"]
[Date "2006.??.??"]
[Round "1"]
[White "Hoebarth, Guenter"]
[Black "Lehner, Martin"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2094"]
[BlackElo "1820"]
[PlyCount "73"]
[EventDate "2006.08.28"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Bb4 4. d3 Nc6 5. a3 Be7 6. h3 d5 7. exd5 Nxd5 8. Qe2 Nd4 9. Nxd4 exd4 10. Nxd5 Qxd5 11. Bf4 c5 12. Rg1 Be6 13. g4 0-0-0 14. Bg2 Qd7 15. 0-0-0 Bd6 16. Bxd6 Qxd6 17. Rge1 Qf4+ 18. Qd2 Qxd2+ 19. Kxd2 b6 20. Re5 Kc7 21. Rde1 Bc8 22. Re7+ Rd7 23. Re8 Rxe8 24. Rxe8 Rd8 25. Re4 Kd6 26. Re1 f5 27. g5 Bd7 28. b4 Re8 29. bxc5+ bxc5 30. Rb1 Bc6 31. Bxc6 Kxc6 32. Rb2 f4 33. c4 f3 34. Kd1 a6 35. a4 Kc7 36. a5 Re6 37. h4 1/2-1/2

[Event "Leonding op 9th"]
[Site "Leonding"]
[Date "2006.??.??"]
[Round "4"]
[White "Lehner, Martin"]
[Black "Feichtner, Aribert"]
[Result "1-0"]
[ECO "C30"]
[WhiteElo "1820"]
[PlyCount "29"]
[EventDate "2006.08.28"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 e5 2. f4 Bd6 3. Nf3 exf4 4. d4 g5 5. Bc4 Nc6 6. h4 Be7 7. 0-0 g4 8. Ng5 Bxg5 9. hxg5 Na5 10. Bxf7+ Kxf7 11. Bxf4 Kg6 12. Be5 Ne7 13. Rf6+ Kxg5 14. Qd2+ Kh4 15. Qh6# 1-0

[Event "Leonding op 9th"]
[Site "Leonding"]
[Date "2006.??.??"]
[Round "7"]
[White "Lehner, Martin"]
[Black "Krug, Juergen"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1820"]
[PlyCount "52"]
[EventDate "2006.08.28"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Bg4 6. Be2 e6 7. 0-0 cxd4 8. Nxd4 Bxe2 9. Qxe2 Nc6 10. Be3 Be7 11. c4 Nxd4 12. Qd2 Nf3+ 13. gxf3 Qxf3 14. Qa5 Qg4+ 15. Kh1 Qe4+ 16. Kg1 Qxc4 17. Nd2 Qd5 18. Qa4+ b5 19. Qa6 0-0 20. Rac1 Bb4 21. Rfd1 Bxd2 22. Rxd2 Qf3 23. Qxb5 h6 24. Rc3 Qg4+ 25. Kh1 Ne4 26. Rd4 Qf3+ 0-1

[Event "Leonding op 9th"]
[Site "Leonding"]
[Date "2006.??.??"]
[Round "2"]
[White "Lehner, Martin"]
[Black "Seher, Karl Heinz"]
[Result "1/2-1/2"]
[ECO "B75"]
[WhiteElo "1820"]
[BlackElo "2034"]
[PlyCount "51"]
[EventDate "2006.08.28"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d6 5. Nc3 g6 6. Be3 Bg7 7. Bc4 Nf6 8. Qd2 Bd7 9. f3 a6 10. g4 Rc8 11. Nxc6 Bxc6 12. Bb3 b5 13. h4 a5 14. h5 b4 15. Na4 Nd7 16. hxg6 fxg6 17. 0-0-0 Ne5 18. Qd4 Kf8 19. Nc5 Bd7 20. Nxd7+ Qxd7 21. Bh6 a4 22. Bxg7+ Kxg7 23. Qxe5+ dxe5 24. Rxd7 axb3 25. axb3 Kf6 26. Rb7 1/2-1/2

[Event "Leonding op 9th"]
[Site "Leonding"]
[Date "2006.??.??"]
[Round "5"]
[White "Lehner, Martin"]
[Black "Tiefenthaler, Bernhard"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "1820"]
[PlyCount "81"]
[EventDate "2006.08.28"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 e6 5. Nf3 Nf6 6. c5 Nc6 7. a3 Bd7 8. Bd3 Qc7 9. 0-0 Be7 10. Nc3 0-0 11. Re1 Rfe8 12. g3 Bf8 13. Bf4 Qd8 14. Nb5 Rc8 15. Bd6 a6 16. Bxf8 axb5 17. Bd6 Qa5 18. b4 Qa4 19. Bc2 Qa6 20. Qd3 Ne4 21. Rxe4 dxe4 22. Qxe4 f5 23. Qh4 Nxb4 24. Bb3 Nd5 25. Ne5 Nf6 26. g4 fxg4 27. Nxd7 Nxd7 28. Qxg4 Nf6 29. Bxe6+ Kh8 30. Qf5 Ra8 31. Bf7 Re2 32. a4 Qc6 33. d5 Qa6 34. Be5 bxa4 35. d6 Rxe5 36. Qxe5 Qc6 37. Be6 a3 38. Qd4 Nd7 39. Bxd7 Qxd7 40. Qb4 Ra4 41. Rxa3 1/2-1/2

[Event "Leonding op 9th"]
[Site "Leonding"]
[Date "2006.??.??"]
[Round "3"]
[White "Prassl, Alfred"]
[Black "Lehner, Martin"]
[Result "1-0"]
[ECO "D35"]
[BlackElo "1820"]
[PlyCount "47"]
[EventDate "2006.08.28"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. d4 e6 2. Bf4 Nf6 3. c4 c5 4. Nc3 d5 5. e3 cxd4 6. exd4 Bd6 7. Bxd6 Qxd6 8. c5 Qe7 9. Nf3 0-0 10. Bb5 Nc6 11. 0-0 Bd7 12. Re1 b6 13. Bxc6 Bxc6 14. b4 bxc5 15. bxc5 Nd7 16. Rb1 f6 17. Nb5 e5 18. Nd6 e4 19. Nh4 g6 20. Qg4 f5 21. Nhxf5 Rxf5 22. Nxf5 Qf6 23. Ne3 Qxd4 24. Qe6+ 1-0

[Event "Leonding op 9th"]
[Site "Leonding"]
[Date "2006.??.??"]
[Round "6"]
[White "Thaller, Andreas"]
[Black "Lehner, Martin"]
[Result "1/2-1/2"]
[ECO "C21"]
[BlackElo "1820"]
[PlyCount "72"]
[EventDate "2006.08.28"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. c3 d5 4. Qxd4 Be6 5. e5 c5 6. Bb5+ Nc6 7. Qd1 Qc7 8. f4 0-0-0 9. Qa4 Nge7 10. Nf3 h6 11. 0-0 Kb8 12. Na3 Qb6 13. Be3 d4 14. cxd4 cxd4 15. Bf2 Nf5 16. Bxc6 bxc6 17. Nc4 Qb4 18. Qxb4+ Bxb4 19. b3 Bxc4 20. bxc4 c5 21. Rfb1 Kc7 22. a3 Bc3 23. Ra2 Rb8 24. Rb5 Rxb5 25. cxb5 Rb8 26. a4 a6 27. Kf1 axb5 28. axb5 Rxb5 29. Ra7+ Rb7 30. Rxb7+ Kxb7 31. Ke2 c4 32. g4 d3+ 33. Kd1 Ne7 34. f5 Nc6 35. Bg3 Kc8 36. Bf4 Kd7 1/2-1/2

[Event "Budapest FS11 FM-B"]
[Site "Budapest"]
[Date "2004.11.11"]
[Round "6"]
[White "Lehner, Martin"]
[Black "Jasz, Peter"]
[Result "1/2-1/2"]
[ECO "B70"]
[WhiteElo "1815"]
[BlackElo "2019"]
[PlyCount "29"]
[EventDate "2004.11.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "HUN"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bd3 Nc6 7. Nxc6 bxc6 8. f4 Bg7 9. 0-0 Qc7 10. h3 0-0 11. f5 Rb8 12. Qe1 e6 13. Na4 exf5 14. exf5 Bd7 15. fxg6 1/2-1/2

[Event "Budapest FS11 FM-B"]
[Site "Budapest"]
[Date "2004.11.10"]
[Round "5"]
[White "Vetter, Hans Peter"]
[Black "Lehner, Martin"]
[Result "0-1"]
[ECO "D06"]
[BlackElo "1815"]
[PlyCount "117"]
[EventDate "2004.11.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "HUN"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d5 3. e3 Bf5 4. Nc3 e6 5. Qb3 b6 6. Nf3 Be7 7. Ne5 0-0 8. Be2 c6 9. 0-0 h5 10. Qd1 h4 11. f4 dxc4 12. Bxc4 b5 13. Be2 b4 14. Nb1 Qb6 15. Nd2 Nbd7 16. Ndc4 Qc7 17. Bf3 Ne4 18. Qa4 Nxe5 19. fxe5 Rad8 20. Bxe4 Bxe4 21. Nd2 Bd3 22. Rf2 c5 23. Nf3 c4 24. Bd2 a5 25. Rc1 Rc8 26. Qd1 Be4 27. Qe1 Qb7 28. h3 a4 29. Qf1 a3 30. bxa3 c3 31. Be1 b3 32. axb3 Qxb3 33. Re2 Bxa3 34. Bxh4 Bxc1 35. Qxc1 Qb1 36. Re1 Qxc1 37. Rxc1 Rc6 38. Be7 Rb8 39. Kf2 Rb1 40. Rxb1 Bxb1 41. Ba3 Ra6 42. Bb4 Ra2+ 43. Ke1 Rxg2 44. Bxc3 Rg3 45. Nd2 Rxe3+ 46. Kf2 Rxc3 47. Nxb1 Rxh3 48. Nd2 Rh2+ 49. Ke3 Rxd2 50. Kxd2 Kh7 51. Ke3 g5 52. Kf3 Kg6 53. Kg4 f5+ 54. Kg3 Kh5 55. Kf3 g4+ 56. Kf4 Kg6 57. Ke3 Kg5 58. Kd3 Kf4 59. Kc4 0-1

[Event "Budapest FS11 FM-B"]
[Site "Budapest"]
[Date "2004.11.09"]
[Round "4"]
[White "Lehner, Martin"]
[Black "Zoltan, Andras"]
[Result "1/2-1/2"]
[ECO "C36"]
[WhiteElo "1815"]
[BlackElo "2075"]
[PlyCount "21"]
[EventDate "2004.11.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "HUN"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 e5 2. f4 d5 3. exd5 exf4 4. Nf3 Nf6 5. c4 c6 6. d4 cxd5 7. c5 b6 8. b4 a5 9. Bb5+ Bd7 10. Bxd7+ Nfxd7 11. Qa4 1/2-1/2

[Event "Budapest FS11 FM-B"]
[Site "Budapest"]
[Date "2004.11.08"]
[Round "3"]
[White "Glatzel, Hans Joachim"]
[Black "Lehner, Martin"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "1973"]
[BlackElo "1815"]
[PlyCount "43"]
[EventDate "2004.11.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "HUN"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 c6 5. e3 Bd6 6. Bd3 dxc4 7. Bxc4 0-0 8. a4 a5 9. 0-0 Nbd7 10. e4 e5 11. Re1 h6 12. h3 Qc7 13. Be3 Re8 14. Rc1 exd4 15. Bxd4 Ne5 16. Ba2 Nxf3+ 17. Qxf3 Be5 18. Nd5 Nxd5 19. exd5 Bd7 20. d6 Bh2+ 21. Kh1 Rxe1+ 22. Rxe1 1-0

[Event "Budapest FS11 FM-B"]
[Site "Budapest"]
[Date "2004.11.07"]
[Round "2"]
[White "Lehner, Martin"]
[Black "Dobos, Otto"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "1815"]
[BlackElo "1993"]
[PlyCount "31"]
[EventDate "2004.11.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "HUN"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 d6 2. Bc4 Nf6 3. Nc3 c6 4. d3 b5 5. Bb3 g6 6. Nf3 a5 7. a4 b4 8. Ne2 Bg7 9. c3 bxc3 10. bxc3 0-0 11. 0-0 Na6 12. e5 Ng4 13. exd6 exd6 14. Ba3 Re8 15. Ned4 c5 16. Bd5 1/2-1/2

[Event "Budapest FS11 FM-B"]
[Site "Budapest"]
[Date "2004.11.06"]
[Round "1"]
[White "Lehner, Martin"]
[Black "Papp, Jozsef"]
[Result "0-1"]
[ECO "B48"]
[WhiteElo "1815"]
[BlackElo "1915"]
[PlyCount "54"]
[EventDate "2004.11.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "HUN"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 e6 6. Be3 Qc7 7. a3 Nf6 8. f4 d6 9. g4 Nxd4 10. Bxd4 e5 11. g5 exd4 12. Qxd4 Nd7 13. 0-0-0 Nb6 14. f5 Bd7 15. Rd3 Qc5 16. Bg2 Qxd4 17. Rxd4 Bc6 18. a4 Be7 19. h4 0-0-0 20. a5 Na8 21. Rh3 f6 22. Nd5 Bxd5 23. exd5 fxg5 24. Rc3+ Kb8 25. Rb4 gxh4 26. f6 Bxf6 27. Rc6 Ka7 0-1

[Event "Prague op 02nd"]
[Site "Prague"]
[Date "2003.01.??"]
[Round "7.55"]
[White "Lehner, Martin"]
[Black "Burggraf, Thomas"]
[Result "1/2-1/2"]
[ECO "B01"]
[PlyCount "119"]
[EventDate "2003.01.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 092 Extra"]
[Source "ChessBase"]
[SourceDate "2003.03.07"]
[SourceVersion "1"]
[SourceVersionDate "2003.03.07"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Bc4 Nxd5 4. Nf3 Bg4 5. d4 e6 6. Be3 Nxe3 7. fxe3 Bd6 8. Nbd2 0-0 9. c3 c6 10. Qc2 Nd7 11. 0-0-0 h6 12. h3 Bf5 13. Bd3 Bxd3 14. Qxd3 Nf6 15. g4 Nd5 16. Nc4 Be7 17. Rdg1 g6 18. h4 Kg7 19. h5 g5 20. Nfe5 b5 21. Nxf7 Rxf7 22. Qg6+ Kf8 23. Ne5 Rf6 24. Qh7 Ke8 25. Qg8+ Bf8 26. Rf1 Rc8 27. Rxf6 Qxf6 28. Qg6+ Qxg6 29. hxg6 Nxe3 30. Kd2 Nc4+ 31. Nxc4 bxc4 32. Rf1 Rc7 33. Ke3 Rg7 34. Ke4 Ke7 35. b3 cxb3 36. axb3 Kd6 37. Rxf8 Rxg6 38. Rf7 a5 39. Ra7 Rf6 40. Rh7 Rf4+ 41. Kd3 Rxg4 42. Rxh6 Rg3+ 43. Kc4 g4 44. Rh5 Rf3 45. Rxa5 Rf5 46. Ra2 Rg5 47. Rg2 g3 48. Kd3 e5 49. dxe5+ Kxe5 50. Ke3 Kd5 51. Kf4 Rg7 52. Rxg3 Rxg3 53. Kxg3 Ke4 54. Kf2 Kd3 55. c4 c5 56. b4 cxb4 57. c5 b3 58. c6 b2 59. c7 b1Q 60. c8Q 1/2-1/2

