Why no thinker talk?

[Martin Thoresen]

Just to bring this back up with a sample of some more games from Thinker. Ponder on, own books, Q6600 @ 3.4GHz.

[Event "Echolyn 4"]
[Date "2008.04.09"]
[Round "11"]
[White "Thinker 5.1b Passive 64-bit"]
[Black "Loop M1-P 64-bit"]
[Result "1-0"]
[ECO "B95"]
[Opening "Sicilian"]
[Variation "Najdorf, 6...e6"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. Qf3 Be7 8.
O-O-O Nbd7 9. Be2 O-O 10. Rhe1 Qc7 11. Qg3 Kh8 12. f4 h6 13. Qh4 Kg8 14.
Bxh6 gxh6 15. Qxh6 Nc5 16. Bc4 Ng4 17. Qh3 e5 18. Nf5 Bxf5 19. exf5 Nf2 20.
Qg3+ Kh8 21. Qxf2 Rg8 22. Bxf7 Rg7 23. Nd5 Qd8 24. Bg6 Nd7 25. Re3 Kg8 26. Rh3 1-0
[d]


[Event "3 Minutes/Game"]
[Site "Echolyn 9"]
[Date "2008.04.10"]
[Round "11"]
[White "Thinker 5.1b Passive 64-bit"]
[Black "Glaurung 2.0.1 64-bit"]
[Result "1-0"]
[ECO "B66"]
[Opening "Sicilian"]
[Variation "Richter-Rauzer, Rauzer attack, 7...a6"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8.
O-O-O h6 9. Nxc6 bxc6 10. Bf4 d5 11. Qe3 Be7 12. Be2 O-O 13. h4 Bb4 14. e5
Nd7 15. Bxh6 Bxc3 16. bxc3 gxh6 17. Rh3 Nxe5 18. Qxh6 Bd7 19. Rdd3 f5 20.
Rhg3+ Kf7 21. Rg7+ Ke8 22. Bh5+ Rf7 23. Rdg3 Ke7 24. Bxf7 1-0
[d]



[Event "3 Minutes/Game"]
[Site "Echolyn 8"]
[Date "2008.04.09"]
[Round "2.8"]
[White "The Baron 1.8.1"]
[Black "Thinker 5.1b Passive 64-bit"]
[Result "0-1"]
[ECO "E50"]
[Opening "Nimzo-Indian"]
[Variation "4.e3 e8g8, 5.Nf3, without ...d5"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 Nc6 7. d5 Ne7 8.
e4 Bxc3+ 9. bxc3 d6 10. Bg5 Ng6 11. O-O h6 12. Be3 exd5 13. cxd5 Bg4 14. h3
Bh5 15. g4 Nxg4 16. hxg4 Bxg4 17. Rb1 b6 18. Be2 f5 19. exf5 Bxf5 20. Rb2
Qf6 21. Qa4 Rae8 22. Rd1 Re4 23. Qxa7 Nh4 24. Rc1 Qg6+ 25. Kf1 Qg2+ 26. Ke1
Nxf3+ 27. Bxf3 Rxe3+ 28. fxe3 Qxf3 0-1
[d]



[Event "3 Minutes/Game"]
[Site "Echolyn 8"]
[Date "2008.04.09"]
[Round "2.5"]
[White "Thinker 5.1b Passive 64-bit"]
[Black "Glaurung 2.0.1 64-bit"]
[Result "1-0"]
[ECO "B47"]
[Opening "Sicilian"]
[Variation "Taimanov (Bastrikov) variation"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 a6 7. O-O Bd6
8. Kh1 Nxd4 9. Qxd4 Nf6 10. Qd3 O-O 11. f4 Be7 12. Be3 d6 13. Bd4 b5 14. e5
dxe5 15. Bxe5 Qa7 16. Qg3 Bb7 17. f5 Qb6 18. Rad1 exf5 19. Rd7 Rfe8 20.
Rxf5 Kh8 21. Bd3 Rad8 22. Rxf6 Bxf6 23. Qh3 h6 24. Qf5 g6 25. Qxf6+ Qxf6
26. Bxf6+ Kh7 27. Rxf7+ Kg8 28. Rg7+ Kf8 29. h4 Re6 30. Rxg6 Rdd6 31. Bg7+
Kf7 32. Rxe6 Rxe6 33. Bd4 Rd6 34. Bc5 Rd8 35. a4 bxa4 36. Nxa4 Bc6 37. Nc3
Kf6 38. Kh2 1-0
[d]



[Event "3 Minutes/Game"]
[Site "Echolyn 8"]
[Date "2008.04.09"]
[Round "2.3"]
[White "Thinker 5.1b Passive 64-bit"]
[Black "Spike 1.2 Turin"]
[Result "1-0"]
[ECO "A15"]
[Opening "English opening"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. d4 O-O 5. Bg2 d6 6. Nc3 Na6 7. O-O c5 8.
Bg5 h6 9. Bd2 Bd7 10. d5 Qc8 11. Qb3 Ng4 12. a3 Nc7 13. Rfd1 Rb8 14. a4 b6
15. e4 g5 16. Rf1 f5 17. Qc2 f4 18. gxf4 gxf4 19. Kh1 Rf7 20. Ne2 e5 21. b4
cxb4 22. Bxb4 Bf8 23. Ba3 Na6 24. Nd2 Rg7 25. Nc3 Nc5 26. Rab1 Qe8 27. Nf3
Nxa4 28. Nb5 Nc5 29. Nc3 Rc8 30. Ra1 Qg6 31. Nh4 Qh5 32. Nf3 b5 33. Bxc5
Rxc5 34. Qd3 Qg6 35. Nh4 bxc4 36. Qd2 Qh5 37. Nf3 Rc7 38. Qb2 Qg6 39. Rg1
Rb7 40. Qe2 Rb3 41. Rac1 Qh5 42. Bf1 Rb4 43. Rc2 Be7 44. Na2 Rb8 45. Nc3
Rc8 46. Rg2 a6 47. Ra2 Bb5 48. Rb2 Rc5 49. Qe1 Bd8 50. Ra2 Kh7 51. Be2 Rcc7
52. Ng1 Qh4 53. Nf3 Qe7 54. Nd2 h5 55. Qg1 Qh4 56. Nf3 Qh3 57. Ra3 Kh6 58.
Ne1 Be8 59. Nb5 Qxg2+ 60. Nxg2 Bxb5 61. h3 Nf6 62. Bf3 Nd7 63. Qe1 Nc5 64.
Bd1 Kh7 65. Qe2 Kg8 66. Qf3 Nd3 67. Ra2 c3 68. Rc2 h4 69. Be2 Nb4 70. Rc1
Na2 71. Rc2 Ba4 72. Rxa2 c2 73. Rxc2 Bxc2 74. Qh5 Rcf7 75. Bf3 a5 76. Nxh4
Bxh4 77. Qxh4 Rd7 78. Qh5 Rd8 79. Kh2 Ba4 80. Qh6 Be8 81. Bg4 Rdd7 82. Be6+
Rgf7 83. h4 a4 84. h5 a3 85. Qg6+ Kf8 86. h6 a2 87. Bxf7 Rxf7 88. Qxd6+ Kg8
89. Qg6+ Kh8 90. Qa6 Rh7 91. Kg2 Kg8 92. Qxa2 1-0
[d]



[Event "Echolyn 7"]
[Site "?"]
[Date "2008.04.09"]
[Round "3.2"]
[White "Thinker 5.1b Passive 64-bit"]
[Black "Alaric 707"]
[Result "1-0"]
[ECO "E07"]
[Opening "Catalan"]
[Variation "closed, Botvinnik variation"]

1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. O-O c6 7. Nc3 Nbd7 8.
Qd3 b6 9. cxd5 Nxd5 10. e4 Nxc3 11. bxc3 Re8 12. Rd1 Bb7 13. Rb1 a5 14. Qc2
Ba6 15. c4 Rc8 16. Bh3 b5 17. c5 Bb7 18. Rb2 a4 19. Bf4 h5 20. e5 Nf8 21.
Nd2 a3 22. Rbb1 Ng6 23. Be3 Qd7 24. Ne4 Ra8 25. Nd6 Reb8 26. Bf1 h4 27. Bd3
Nf8 28. Qe2 Ra4 29. Qg4 Bd8 30. Bc2 Ra7 31. Bh6 f5 32. exf6 Bxf6 33. Kh1
Qe7 34. Rg1 hxg3 35. Rxg3 Rd8 36. Re1 Ba8 37. Rf3 Rad7 38. Bf4 Bb7 39. Bb3
Rxd6 40. Bxd6 Rxd6 41. cxd6 Qxd6 42. Bxe6+ Nxe6 43. Rxe6 1-0
[d]



[Event "3 Minutes/Game"]
[Site "Echolyn 8"]
[Date "2008.04.09"]
[Round "1.3"]
[White "Spike 1.2 Turin"]
[Black "Thinker 5.1b Passive 64-bit"]
[Result "0-1"]
[ECO "B81"]
[Opening "Sicilian"]
[Variation "Scheveningen, Keres attack"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g4 h6 7. h4 Nc6 8.
Rg1 h5 9. gxh5 Nxh5 10. Bg5 Nf6 11. Qd2 Qb6 12. Nb3 Bd7 13. O-O-O a6 14.
Rg3 O-O-O 15. Na4 Qb4 16. Qxb4 Nxb4 17. Nc3 Kc7 18. Nd2 Nc6 19. Be2 b5 20.
Nf3 b4 21. Nb1 Nxe4 22. Bxd8+ Nxd8 23. Rg2 g6 24. c3 e5 25. cxb4 Bh6+ 26.
Kc2 Ne6 27. Bxa6 Nf4 28. Rgg1 Nxf2 29. Rde1 Ra8 30. Bc4 d5 31. Bf1 e4 32.
Ng5 f6 33. Nf7 Bf8 34. Nc3 Be8 35. Nh8 Bxb4 36. a3 Ba4+ 37. b3 Bxc3 38.
Kxc3 Rxh8 39. bxa4 Rxh4 40. a5 e3 41. Rc1 Kd6 42. Bb5 d4+ 43. Kb3 Ne4 44.
Rc8 Rh5 45. Rd8+ Kc5 46. a4 Rh7 47. Rc8+ Kd6 48. Kc4 d3 49. Ra1 Nd2+ 50.
Kc3 Nf3 51. Rd8+ Kc7 52. Re8 d2 53. a6 Kb6 54. Re4 Rc7+ 55. Kb2 Nd5 56. Be2
Ne5 57. Rd4 Nc3 58. Bf1 g5 59. Bb5 g4 60. a7 Kxa7 61. Rd8 Nd7 0-1
[d]

[Marc MP]

Hi Martin,

In my opinion, Thinker 5.0 "passive" is the Tal of chess engines! I was absolutely not surprised to see diagrams as you shown above..

[ArmyBridge]

Hi
Thinker is now my favorit engine, I hope to see that CCRL or CEGT test this fantastic engine against the madness king.... Junior 7, surely it will be a blood bath, it also would be interesting to see it fight against nimzo or gambit tiger, what do you think Graham and Werner, we could see this match in a nearfuture?
Regards

[Graham Banks]

Hi
Thinker is now my favorit engine, I hope to see that CCRL or CEGT test this fantastic engine against the madness king.... Junior 7, surely it will be a blood bath, it also would be interesting to see it fight against nimzo or gambit tiger, what do you think Graham and Werner, we could see this match in a nearfuture?
Regards

Can't say. Somebody else in CCRL would need to test it against Junior 7 because I have given away my older versions of Junior and other commercials.

[maxchgr]

I just ran engine match vs Junior 7 at 15min+10s, 16 games, in Fritz11 GUI
I used wb2uci for Thinker (passive)
Thinker was +11 -4 =1
I'd upload the games but I don't have any webspace
but the games are phenomenal

with the exception of Three games where thinker was obviously exhibiting a bug and basically played random moves leaving all of its pieces hanging and Junior won 10 moves or so after book finished in those games
So that makes 3 of it's 4 losses attributed to that bug

[Ovyron]

I'd upload the games but I don't have any webspace
but the games are phenomenal

I suggest zshare:

http://www.zshare.net/

[maxchgr]

thinkerjunior.pgn - 0.07MB

enjoy

[ArmyBridge]

Thanks a lot great games
Regards

[swami]

thinkerjunior.pgn - 0.07MB

enjoy

It looks like Thinker played "Give away" chess in some of the games. Check its lost games. there's something wrong with the set up.

2nd game is particularly fascinating. Great battle, Thanks!

[CThinker]

thinkerjunior.pgn - 0.07MB
enjoy

Thanks for those games. It looks like you have uncovered something here.

I tried to run those bad games and I could not get the engine to put out the moves that were made as it came out of the book moves.

Reviewing the code, I just realized that the evaluation hash table is not cleared between games. This table happens to be very succeptible to collisions. I suspect that the engine is retrieving stale evaluation values from the previous game.

If you re-run those three bad games starting from the position where they exit from boot moves, I believe you would see a different set of moves from the Thinker engine (assuming also that you re-start the program before each game).

In Areana, you have the option to reload the engine at the start of each game. You have a similar option in WinBoard.

I could send you a quick fix, if you are interested.