[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "1"]
[White "Tal, Mihail"]
[Black "Bhend, Edwin"]
[Result "0-1"]
[ECO "A43"]
[PlyCount "90"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. d4 c5 2. d5 d6 3. e4 g6 4. Nf3 Bg7 5. Be2 Na6 6. O-O Nc7 7. Nc3 f5 8. Bd3
fxe4 9. Nxe4 Nh6 10. Bf4 O-O 11. Qd2 Nf7 12. c4 b5 13. Rae1 Rb8 14. b3 e6 15.
Nfg5 Nxg5 16. Bxg5 Qd7 17. Nc3 b4 18. dxe6 Nxe6 19. Nd5 Bb7 20. Be4 Nxg5 21.
Qxg5 Kh8 22. Bxg6 Bxd5 23. Re7 Qd8 24. Rfe1 Bf7 25. Bc2 Rb7 26. h4 Rxe7 27.
Rxe7 h6 28. Qf5 Bg8 29. Qe4 d5 30. cxd5 Qxd5 31. Qg6 Qd4 32. Qg3 Rf7 33. Re4
Qb2 34. Bd3 Bd4 35. Re2 Qc1+ 36. Kh2 Qf4 37. Re8 Qxg3+ 38. fxg3 Kg7 39. Bc4 Rf8
40. Re7+ Kf6 41. Rxa7 Bxc4 42. bxc4 Kf5 43. Re7 Ra8 44. Re2 Ra3 45. Kh3 h5 0-1
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "2"]
[White "Kupper, Josef"]
[Black "Tal, Mihail"]
[Result "0-1"]
[ECO "B96"]
[PlyCount "48"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 8. Qf3
Bb7 9. Bd3 Be7 10. O-O-O Qb6 11. Rhe1 Nbd7 12. Nce2 Nc5 13. Bxf6 Bxf6 14. g4
Na4 15. c3 b4 16. Bc2 Nxb2 17. Kxb2 bxc3+ 18. Kxc3 O-O 19. Rb1 Qa5+ 20. Kd3
Rac8 21. Qf2 Ba8 22. Rb3 e5 23. g5 exd4 24. Nxd4 Bxd4 0-1
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "3"]
[White "Tal, Mihail"]
[Black "Larsen, Bent"]
[Result "1-0"]
[ECO "B77"]
[PlyCount "81"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 O-O 8.
Bb3 d6 9. f3 Nxd4 10. Bxd4 Be6 11. Qd2 Qa5 12. O-O-O b5 13. Kb1 b4 14. Nd5 Bxd5
15. exd5 Qb5 16. Rhe1 a5 17. Qe2 Qxe2 18. Rxe2 a4 19. Bc4 Rfc8 20. Bb5 Ra5 21.
Bxf6 Bxf6 22. Bc6 a3 23. b3 Kf8 24. c4 bxc3 25. Kc2 Ra7 26. b4 e6 27. b5 exd5
28. b6 Re7 29. Rxe7 Kxe7 30. Re1+ Be5 31. b7 Rb8 32. f4 Ke6 33. fxe5 dxe5 34.
Rb1 Kd6 35. Rb6 d4 36. Ra6 f5 37. Ra8 Kc7 38. Bd5 e4 39. Rxa3 e3 40. Kd3 g5 41.
Kxd4 1-0
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "4"]
[White "Unzicker, Wolfgang"]
[Black "Tal, Mihail"]
[Result "0-1"]
[ECO "B41"]
[PlyCount "72"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd2 O-O 8. e5
Bxc3 9. Bxc3 Ne4 10. Qc2 d5 11. exd6 Nxc3 12. Qxc3 Qxd6 13. Rd1 e5 14. Nf3 Qg6
15. Bd3 e4 16. Bb1 f5 17. Nh4 Qe6 18. g3 Nc6 19. Rd5 Qf7 20. O-O Be6 21. Rd6
Bxc4 22. Rfd1 Be6 23. Bc2 Rae8 24. Ng2 Qf6 25. Qxf6 Rxf6 26. a3 Ne5 27. Nf4 Bf7
28. Rxf6 gxf6 29. Rd6 Nf3+ 30. Kh1 Rc8 31. Bd1 Rc1 32. Rd8+ Kg7 33. Kg2 Ne1+
34. Kh3 Nd3 35. Be2 Nxf4+ 36. gxf4 Rc2 0-1
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "5"]
[White "Tal, Mihail"]
[Black "Nievergelt, Erwin"]
[Result "1-0"]
[ECO "B63"]
[PlyCount "73"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 h6 8.
Bxf6 gxf6 9. O-O-O a6 10. f4 Bd7 11. Be2 h5 12. Kb1 Qb6 13. Nb3 O-O-O 14. Rhf1
Be7 15. Rf3 Rdg8 16. Bf1 Kb8 17. Rd3 Bc8 18. a3 h4 19. Qe1 Rg4 20. Nd5 exd5 21.
exd5 Ne5 22. fxe5 fxe5 23. Na5 Bd8 24. Nc6+ Ka8 25. Rb3 Qc7 26. Rc3 bxc6 27.
Rxc6 Qb7 28. Rxd6 Ra4 29. Rd3 Bc7 30. Rf6 Bd8 31. Rc6 e4 32. Rb3 Ba5 33. Qe3
Qa7 34. Qh6 Rd8 35. Bxa6 Bd2 36. Qf6 Qd7 37. Bxc8 1-0
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "6"]
[White "Keres, Paul"]
[Black "Tal, Mihail"]
[Result "1/2-1/2"]
[ECO "D42"]
[PlyCount "44"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 Be7 8. O-O
O-O 9. Nxd5 Qxd5 10. e4 Qh5 11. dxc5 Bxc5 12. Bf4 b6 13. a3 Rd8 14. b4 Be7 15.
Rc1 Bb7 16. Qe2 h6 17. Ba6 Bxa6 18. Qxa6 Nd4 19. Nxd4 Rxd4 20. Qb7 Re8 21. Bg3
Qb5 22. h3 Rd7 1/2-1/2
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "7"]
[White "Tal, Mihail"]
[Black "Keller, Dieter"]
[Result "1-0"]
[ECO "D44"]
[PlyCount "67"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 c6 5. Bg5 dxc4 6. e4 b5 7. a4 Qb6 8. Bxf6
gxf6 9. Be2 a6 10. O-O Bb7 11. d5 cxd5 12. exd5 b4 13. a5 Qc7 14. dxe6 bxc3 15.
Nd4 Rg8 16. Qa4+ Kd8 17. g3 Bd5 18. Rfd1 Kc8 19. bxc3 Bc5 20. e7 Nc6 21. Bg4+
Kb7 22. Nb5 Qe5 23. Re1 Be4 24. Rab1 Rxg4 25. Rxe4 Qxe4 26. Nd6+ Kc7 27. Nxe4
Rxe4 28. Qd1 Re5 29. Rb7+ Kxb7 30. Qd7+ Kb8 31. e8=Q+ Rxe8 32. Qxe8+ Kb7 33.
Qd7+ Kb8 34. Qxc6 1-0
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "8"]
[White "Walther, Edgar"]
[Black "Tal, Mihail"]
[Result "0-1"]
[ECO "B46"]
[PlyCount "60"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nc6 7. Nxc6 bxc6 8.
O-O Nf6 9. f4 d5 10. Qf3 Bb7 11. Bd2 c5 12. exd5 c4 13. Be4 exd5 14. Bf5 Bc5+
15. Kh1 g6 16. Rae1+ Kf8 17. Na4 d4 18. Qh3 Kg7 19. Nxc5 Qxc5 20. Re5 Qc6 21.
Rf3 Rhe8 22. Rg3 c3 23. bxc3 dxc3 24. Rxc3 Qb6 25. Be3 Qb1+ 26. Bg1 Be4 27.
Bxe4 Nxe4 28. Rf3 Rad8 29. g3 Rxe5 30. fxe5 Qb7 0-1
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "9"]
[White "Tal, Mihail"]
[Black "Olafsson, Fridrik"]
[Result "1-0"]
[ECO "B45"]
[PlyCount "127"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8.
Nxc3 d5 9. exd5 exd5 10. Bd3 O-O 11. O-O h6 12. Bf4 d4 13. Nb5 Nd5 14. Bg3 Be6
15. Re1 Qd7 16. h3 a6 17. Nd6 Nf6 18. Qf3 Kh8 19. Rad1 Nh7 20. Bxh7 Kxh7 21. c3
dxc3 22. Ne4 Qc8 23. Qxc3 Ne7 24. Nc5 Nf5 25. Bc7 b5 26. Nxe6 fxe6 27. Qc6 Ne7
28. Qxe6 Qxc7 29. Qxe7 Qb6 30. Re3 Rad8 31. Rd7 Rxd7 32. Qxf8 Rd1+ 33. Kh2 Rd8
34. Qf5+ Kh8 35. Re6 Qc7+ 36. g3 Qd7 37. Qe5 Qd2 38. Kg2 Rf8 39. Qe2 Qd5+ 40.
Kg1 Rc8 41. Qe4 Qd2 42. Qe5 Rf8 43. Qe2 Qc1+ 44. Kg2 Qc8 45. b4 Qb7+ 46. Kg1
Qc8 47. Qe3 Kg8 48. h4 Kh8 49. Re7 Qg4 50. Kg2 Qf5 51. Qd4 Qf3+ 52. Kg1 Rf7 53.
Re6 Kg8 54. Rxa6 Re7 55. Qd8+ Kf7 56. Qd2 Kg8 57. Rd6 Qf8 58. Rd5 Re8 59. Rxb5
Qf6 60. Ra5 Kh8 61. Qd5 Rf8 62. Qd2 Qf3 63. Rd5 Qxa3 64. Rd8 1-0
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "10"]
[White "Blau, Max"]
[Black "Tal, Mihail"]
[Result "0-1"]
[ECO "A32"]
[PlyCount "70"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. Nf3 Nf6 2. d4 e6 3. c4 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Bd2 Nc6 7. Nc2 Bc5 8.
Be3 Bxe3 9. Nxe3 O-O 10. g3 d5 11. cxd5 exd5 12. Nexd5 Nxd5 13. Qxd5 Qb6 14.
Qb5 Qxb5 15. Nxb5 Nb4 16. Rc1 Bf5 17. Nd4 Nxa2 18. Rc7 Be4 19. f3 Rfd8 20. e3
Bd5 21. Bh3 Nb4 22. O-O a5 23. Bg2 a4 24. Rfc1 Nd3 25. R1c2 g6 26. Kf1 b5 27.
Nxb5 Rab8 28. Nc3 Be6 29. Ra7 Nxb2 30. Nxa4 Nd1 31. Rc1 Rd2 32. Kg1 Nxe3 33.
Bf1 Ra2 34. Ra6 Nxf1 35. Kxf1 Bc4+ 0-1
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "11"]
[White "Tal, Mihail"]
[Black "Dueckstein, Andreas"]
[Result "1-0"]
[ECO "E13"]
[PlyCount "113"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. d4 e6 2. Nf3 Nf6 3. c4 Bb4+ 4. Nc3 b6 5. Bg5 Bb7 6. e3 h6 7. Bh4 g5 8. Bg3
Ne4 9. Qc2 d6 10. Bd3 Bxc3+ 11. bxc3 f5 12. d5 exd5 13. cxd5 Bxd5 14. Nd4 Qf6
15. f3 Nxg3 16. hxg3 Nd7 17. Bxf5 Nc5 18. Nb5 Qg7 19. Bg6+ Kd7 20. Bf5+ Be6 21.
Bxe6+ Nxe6 22. Nd4 Nc5 23. Qf5+ Ke7 24. Qd5 Qf6 25. O-O-O Raf8 26. e4 Qf7 27.
Nf5+ Kd7 28. Qxf7+ Rxf7 29. Rxh6 Rxh6 30. Nxh6 Rh7 31. Ng4 Ke6 32. Kd2 b5 33.
Re1 a5 34. Ke3 Rh8 35. f4 b4 36. f5+ Kf7 37. cxb4 axb4 38. Kd4 b3 39. axb3 Rb8
40. Kd5 Rb4 41. Ne5+ Kf6 42. Nc6 Rxb3 43. e5+ dxe5 44. Kxc5 Kxf5 45. Nxe5 Rxg3
46. Re2 Ra3 47. Kd4 Ra4+ 48. Nc4 Kf4 49. Kd3 g4 50. Re3 Ra1 51. g3+ Kf5 52.
Re5+ Kf6 53. Re4 Kg5 54. Ne3 Ra3+ 55. Kd4 Kh5 56. Ke5 Ra8 57. Kf6 1-0
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "12"]
[White "Barcza, Gedeon"]
[Black "Tal, Mihail"]
[Result "1/2-1/2"]
[ECO "A04"]
[PlyCount "82"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. Nf3 g6 2. g3 Bg7 3. Bg2 e5 4. e4 Nc6 5. O-O d6 6. d3 Nge7 7. Nc3 O-O 8. Nh4
Be6 9. Nd5 Bxd5 10. exd5 Nd4 11. c3 Ndf5 12. Nxf5 Nxf5 13. Bd2 Bh6 14. b4 Bxd2
15. Qxd2 Ng7 16. Rae1 f5 17. d4 e4 18. f3 exf3 19. Bxf3 Qd7 20. c4 Rae8 21. c5
Qd8 22. Kg2 Qf6 23. Bd1 Rxe1 24. Rxe1 Re8 25. Rxe8+ Nxe8 26. h4 Qe7 27. Bf3 Nf6
28. Qc3 h6 29. Qd3 Kg7 30. c6 b6 31. Qa3 g5 32. hxg5 hxg5 33. Kf2 g4 34. Bg2
Nh5 35. Qxa7 Nxg3 36. Kxg3 Qe3+ 37. Kh2 Qf4+ 38. Kh1 g3 39. Qa6 Qh6+ 40. Kg1
Qe3+ 41. Kh1 Qh6+ 1/2-1/2
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "13"]
[White "Tal, Mihail"]
[Black "Gligoric, Svetozar"]
[Result "0-1"]
[ECO "C87"]
[PlyCount "84"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Nf6 6. d4 Bd7 7. O-O Be7 8. Nbd2
O-O 9. Re1 Re8 10. a3 Bf8 11. b4 d5 12. Bxc6 Bxc6 13. Nxe5 Nxe4 14. Nxe4 dxe4
15. Qg4 Bd5 16. Qg3 b5 17. Bf4 Rc8 18. f3 exf3 19. Ng4 Kh8 20. gxf3 f6 21. h4
Qd7 22. Ne3 Bf7 23. Kf2 c6 24. h5 Bxh5 25. Rh1 Qf7 26. Qh3 Bg6 27. Qg4 Kg8 28.
Qg1 Qe6 29. Qc1 Bd6 30. Ng2 Rcd8 31. Bxd6 Qxd6 32. Nf4 Bf7 33. Qd2 Re7 34. Rag1
Rde8 35. Qd3 g6 36. Qf5 Kf8 37. Qg4 g5 38. Nd3 Re2+ 39. Kf1 Bg6 40. Nf2 Qe7 41.
Qg3 h5 42. Kg2 h4 0-1
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "14"]
[White "Donner, Jan Hein"]
[Black "Tal, Mihail"]
[Result "0-1"]
[ECO "A70"]
[PlyCount "56"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 Bg7 8. Bd3
O-O 9. O-O a6 10. a4 Bg4 11. h3 Bxf3 12. Qxf3 Nbd7 13. Bf4 Qc7 14. Qe2 Rfe8 15.
Bh2 Rac8 16. Bc4 Ne5 17. f4 Nxc4 18. Qxc4 Nd7 19. Rfe1 Qb6 20. Rab1 Qb4 21. Qf1
c4 22. Re2 b5 23. axb5 axb5 24. Kh1 Bxc3 25. bxc3 Qxc3 26. Rxb5 Qd3 27. Qe1 c3
28. Rb1 Nc5 0-1
[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.??.??"]
[Round "15"]
[White "Tal, Mihail"]
[Black "Fischer, Robert James"]
[Result "1/2-1/2"]
[ECO "B99"]
[PlyCount "69"]
[EventDate "1959.05.19"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "SUI"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3
Qc7 9. O-O-O Nbd7 10. Qg3 h6 11. Bh4 Rg8 12. Be2 g5 13. fxg5 Ne5 14. g6 Nxg6
15. Rhf1 Nxh4 16. Qxh4 Rg6 17. Bd3 Ng4 18. Qh5 Ne5 19. Nf3 Qc5 20. Nxe5 Qxe5
21. Qxe5 dxe5 22. g3 Bd7 23. Be2 Bc6 24. Bh5 Rf6 25. a3 Rd8 26. Rxd8+ Bxd8 27.
Rxf6 Bxf6 28. Kd2 Bg5+ 29. Kd3 Bc1 30. Nd1 Bb5+ 31. c4 Ba4 32. Nc3 Bc6 33. Nd1
Kf8 34. h4 Ba4 35. Nc3 1/2-1/2
