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Subject: About Tao 5.2

Author: Bas Hamstra

Date: 17:41:13 07/25/02


Friends,

I am testing Tao 5.2 at the moment and it has achieved a historical standard
rating of 2593 at IIC based on mostly 60/G games versus Yace, Arasan, Comet and
Crafty at roughly equal hardware. Below I enclose the last couple of 60/G games
played at ICC.

Maybe the current impression is based on too few games, but it seems like a good
point to deliver the promised update. OK, what is new?

- Tablebase support
- UCI support (no multi PV yet)
- Better endgame evaluation and slightly more aggressive play
- Will claim draw when insufficient material or 3rep
- Bugfix that caused Tao to sometimes crash
- Improved search efficiency
- New Tao logo by Wilhelm Hudetz

I think the TB has made stronger, time will tell how much. Anyway, Tao's weakest
point, the endgame, has improved, I think.

I will send the update to Leo, as soon as I find out his email.

Have fun!

Bas Hamstra.


Counterplay = Yace
X-Engine = Comet

[Event "ICS rated standard match"]
[Site "chessclub.com"]
[Date "2002.07.24"]
[Round "-"]
[White "counterplay"]
[Black "TaoYin"]
[Result "1-0"]
[WhiteElo "2534"]
[BlackElo "2537"]
[TimeControl "3000+5"]

1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. O-O Be7
8. a3 Be6 9. d3 O-O 10. b4 a5 11. b5 Nd4 12. Rb1 Nxf3+ 13. Bxf3 Rb8 14. Ne4
Bh3 15. Re1 f5 16. Nd2 Bd6 17. Qc2 Kh8 18. Nb3 a4 19. Nc5 Bxc5 20. Qxc5 Re8
21. Rb4 g5 22. d4 Nd7 23. Qd5 g4 24. Bh1 Qe7 25. dxe5 Nxe5 26. Bb2 Rbd8 27.
Qxb7 Kg8 28. Rd4 Rxd4 29. Bxd4 Nf3+ 30. Bxf3 gxf3 31. Qxf3 Qe4 32. Qxe4
fxe4 33. Rb1 Bg4 34. Kf1 Rb8 35. Rb4 Bd7 36. Rxa4 Rxb5 37. Rc4 Rb1+ 38. Kg2
Bb5 39. Rxc7 Bxe2 40. Kh3 Rd1 41. Be3 Rd6 42. Kh4 Rg6 43. Rc2 Bf3 44. h3
Ra6 45. Rc8+ Kf7 46. Rc7+ Kg8 47. Bc1 Bg2 48. Rc4 Kf7 49. g4 Ra7 50. a4 Bf3
51. Bd2 Bh1 52. a5 Bf3 53. Rc5 Be2 54. Be3 Re7 55. Rf5+ Ke6 56. Rh5 Bc4 57.
a6 Bd5 58. Rh6+ Ke5 59. a7 Ba8 60. g5 Rg7 61. Rf6 Rg8 62. Rb6 Rg7 63. Rb8
Bc6
{TaoYin resigns} 1-0

[Event "ICS rated standard match"]
[Site "chessclub.com"]
[Date "2002.07.25"]
[Round "-"]
[White "TaoYin"]
[Black "counterplay"]
[Result "1-0"]
[WhiteElo "2521"]
[BlackElo "2550"]
[TimeControl "3300+5"]

1. e4 c5 2. d4 cxd4 3. c3 d3 4. Bxd3 Nc6 5. Nf3 d6 6. O-O g6 7. Bc4 Bg7 8.
Ng5 Ne5 9. Bb3 Nh6 10. Na3 O-O 11. h3 b6 12. f4 Nc6 13. Be3 Bb7 14. Qd3 Na5
15. Bd5 Bxd5 16. Qxd5 e6 17. Qb5 Qc7 18. Rad1 Rfd8 19. Bf2 Rac8 20. Qa6 Qe7
21. Nb5 Ra8 22. Nf3 f6 23. e5 d5 24. Nbd4 Re8 25. exf6 Qxf6 26. Rde1 Nf5
27. Qb5 Rad8 28. Ng5 e5 29. Rxe5 Rxe5 30. fxe5 Qxg5 31. Ne6 Qe7 32. Nxd8
Qxd8 33. e6 Qa8 34. g4 Ne7 35. Qd7 Nac6 36. b4 Bxc3 37. b5 Nd4 38. Be3 Qb8
39. Kh1 Ne2 40. Rf7 Bb4 41. Bh6 d4 42. Qxa7 Qe8 43. Rf8+ Qxf8 44. Bxf8 Kxf8
45. Qb8+ Kg7 46. Qe5+ Kg8 47. Qxe2 Bc5 48. a4 h6 49. a5 bxa5 50. Qe5 d3 51.
Qxc5 d2 52. Qd4 h5
{counterplay resigns} 1-0

[Event "ICS rated standard match"]
[Site "chessclub.com"]
[Date "2002.07.25"]
[Round "-"]
[White "counterplay"]
[Black "TaoYin"]
[Result "0-1"]
[WhiteElo "2533"]
[BlackElo "2538"]
[TimeControl "3300+5"]

1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 4. Nc3 e6 5. Nxd5 exd5 6. d4 Nc6 7. dxc5 Bxc5
8. Qxd5 Qb6 9. Bc4 Bxf2+ 10. Ke2 O-O 11. Rf1 Bc5 12. Ng5 Nd4+ 13. Kd1 Ne6
14. Ne4 d6 15. exd6 Rd8 16. Bd3 Bxd6 17. Qh5 f5 18. Nxd6 Qxd6 19. Qxf5 Qxh2
20. Qf7+ Kh8 21. Bg5 Rg8 22. Be3 Qxg2 23. Kc1 Qh2 24. Qf3 Qe5 25. Rh1 g6
26. Bd2 Rg7 27. Kb1 Kg8 28. Bc3 Qf4 29. Qxf4 Nxf4 30. Bxg7 Kxg7 31. Be4 h5
32. a4 Rb8 33. a5 Be6 34. Rf1 g5 35. Ra4 b5 36. Rd4 Kf6 37. Bf3 Ke5 38. c3
h4 39. Re1+ Kf5 40. Be4+ Kg4 41. Bc2 Bd5 42. Rg1+ Kh5 43. Bd1+ Kh6 44. Rf1
Bg2 45. Rd6+ Kg7 46. Re1 h3 47. Rd7+ Kf6 48. Rd6+ Kf5 49. Rh6 Be4+ 50. Ka2
Rd8 51. Rg1 Bg2 52. Bc2+ Kg4 53. Re1 Kg3 54. Re3+ Bf3 55. Be4 g4 56. Bxf3
gxf3 57. Rh7 Rf8 58. Rxa7 Ne2 59. Rae7 h2 60. Rh7 Kg2 61. c4 bxc4 62. Re4
Nc1+ 63. Kb1 f2 64. Reh4 f1=Q 65. Rxh2+ Kg3 66. R2h3+ Qxh3 67. Rxh3+ Kxh3
68. Kxc1 c3 69. bxc3 Ra8 70. Kb2 Rxa5 71. c4 Kg4 72. Kc3 Kf5 73. Kd4 Ke6
74. Ke4
{counterplay resigns} 0-1

[Event "ICS rated standard match"]
[Site "chessclub.com"]
[Date "2002.07.25"]
[Round "-"]
[White "TaoYin"]
[Black "X-Engine"]
[Result "1-0"]
[WhiteElo "2554"]
[BlackElo "2520"]
[TimeControl "3600+10"]

1. Nf3 Nf6 2. b3 g6 3. c4 Bg7 4. Bb2 d6 5. d4 O-O 6. g3 c5 7. Bg2 Ne4 8.
O-O Nc6 9. Nbd2 Bf5 10. e3 Qa5 11. Nxe4 Bxe4 12. Qe2 Bxf3 13. Bxf3 cxd4 14.
Bxc6 d3 15. Qxd3 Bxb2 16. Bxb7 Bxa1 17. Bxa8 Qxa2 18. Bc6 Rb8 19. Ba4 Bf6
20. e4 Qb2 21. Rb1 Qa3 22. f4 Qc5+ 23. Kh1 Bd4 24. Rd1 e5 25. Rf1 exf4 26.
gxf4 Rb6 27. Qd2 a6 28. Rf3 Qh5 29. Qd1 Bc5 30. Rf1 Qh4 31. Qf3 Bd4 32. Rd1
Qf6 33. Rd3 Kg7 34. Qg3 Bc5 35. Rd1 Rb4 36. Re1 Qd4 37. Qf3 Qb2 38. Qe2 Qc3
39. Rf1 Qd4 40. Rd1 Qf6 41. Qf3 Qb2 42. Qd3 h6 43. Qf3 Rb8 44. Rf1 Rg8 45.
Re1 f6 46. Qg2 Qc3 47. Rf1 Kh7 48. Qg3 Qd4 49. Bc6 Rg7 50. Qf3 f5 51. Bd5
Re7 52. exf5 gxf5 53. Qh3 Qf6 54. Qd3 Rg7 55. Qb1 Bb6 56. Bf3 Be3 57. Bg2
Qg6 58. Bh3 Kh8 59. Qe1 Bb6 60. Qd1 a5 61. Qa1 Qh5 62. Qc3 Qe2 63. Qe1 Qd3
64. Bg2 Qc2 65. Bh3 Bd4 66. Qe6 Qe4+ 67. Qxe4 fxe4 68. Bg2 Re7 69. h3 e3
70. Bf3 Rf7 71. Bd1 Bc3 72. Kg2 Bd2 73. Rf3 Kh7 74. Kf1 Kg6 75. Bc2+ Kf6
76. Rg3 Rg7 77. Rxg7 Kxg7 78. Ke2 Kf6 79. h4 Ke6 80. Bh7 Kf6 81. h5 Bc1 82.
Bd3 Bd2 83. Kf3 Ke6 84. Ke4 Kf6 85. Be2 Ke6 86. Bf3 Kf6 87. Bg4 Bc1 88. Be2
Bd2 89. Kd5 Bb4 90. Kd4 Bd2 91. Bd3 Ke6 92. f5+ Kf6 93. Ke4 Bc1 94. Be2 Bb2
95. Kf4 Bc1 96. Ke4 Bb2 97. Bd1 Kg5 98. Bf3 Bf6 99. Be2 Bc3 100. Bd3 Kxh5
101. Kxe3 Kg4 102. Ke4 h5 103. Kd5 h4 104. Kxd6 h3 105. c5 Kg5 106. Ke6 h2
107. Be4 Kf4 108. Bh1 a4 109. bxa4 Kg5 110. c6 Ba5
{X-Engine resigns} 1-0

[Event "ICS rated standard match"]
[Site "chessclub.com"]
[Date "2002.07.25"]
[Round "-"]
[White "X-Engine"]
[Black "TaoYin"]
[Result "0-1"]
[WhiteElo "2506"]
[BlackElo "2568"]
[TimeControl "3600+10"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. c3 a6 5. Ba4 d6 6. d4 Bd7 7. dxe5 Nxe5 8.
Nxe5 dxe5 9. O-O Bxa4 10. Qxa4+ Qd7 11. Qxd7+ Kxd7 12. Be3 Bh6 13. Nd2 Bxe3
14. fxe3 Ke6 15. a4 Nf6 16. Rf3 Rhf8 17. Raf1 Nd7 18. Nc4 b5 19. axb5 axb5
20. Na3 c6 21. Nc2 Ra2 22. R3f2 Rxb2 23. Nd4+ exd4 24. Rxb2 d3 25. Rc1 Ne5
26. Ra2 Kd6 27. Rb1 Kc5 28. Kf2 Kc4 29. Ra3 c5 30. h3 Nd7 31. e5 Re8 32.
Ra5 Rxe5 33. Rbxb5 Nf6 34. Rb7 Ne4+ 35. Ke1 Nxc3 36. Kd2 Rf5 37. Ke1 Rd5
38. Rb2 Ne4 39. Ra4+ Kc3 40. Rxe4 Kxb2 41. Kd2 Kb3 42. Re7 c4 43. Rb7+ Ka4
44. Rxf7 c3+ 45. Kxc3 d2 46. Rf4+
{X-Engine resigns} 0-1






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