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- - By Venator (Silver) [nl] Date 2008-05-30 16:54
Two rounds so far, Rybka started with 2 out of 2. Unfortunately I lost the evals from round 2. Here are the games:

[Event "Leiden ICT"]
[Site "Apeldoorn"]
[Date "2008.05.30"]
[Round "?"]
[White "Rybka"]
[Black "Hermann"]
[Result "1-0"]
[ECO "C92"]
[PlyCount "121"]
[TimeControl "4980"]

{1MB, Leiden1.ctg, Intel Core Duo T2300} 1. e4 {[%emt 0:00:00]} e5 {
[%emt 0:00:07]} 2. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:06]} 3. Bb5 {
[%emt 0:00:00]} a6 {[%emt 0:00:06]} 4. Ba4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:06]
} 5. O-O {[%emt 0:00:00]} Be7 {[%emt 0:00:06]} 6. Re1 {[%emt 0:00:00]} b5 {
[%emt 0:00:06]} 7. Bb3 {[%emt 0:00:00]} d6 {[%emt 0:00:14]} 8. c3 {
[%emt 0:00:00]} O-O {[%emt 0:00:07]} 9. h3 {[%emt 0:00:00]} Bb7 {[%emt 0:00:08]
} 10. d4 {[%emt 0:00:00]} Re8 {[%emt 0:00:07]} 11. Nbd2 {[%emt 0:00:00]} Bf8 {
[%emt 0:00:07]} 12. d5 {[%emt 0:00:00]} Nb8 {[%emt 0:00:07]} 13. Nf1 {
[%emt 0:00:00]} Nbd7 {[%emt 0:00:10]} 14. Ng3 {[%emt 0:00:00]} Nc5 {
[%emt 0:00:08]} 15. Bc2 {[%emt 0:00:00]} c6 {[%emt 0:00:08]} 16. b4 {
[%emt 0:00:00]} Ncd7 {[%emt 0:00:07]} 17. dxc6 {[%emt 0:00:00]} Bxc6 {
[%emt 0:00:06]} 18. Bb3 {[%emt 0:00:00]} h6 {[%emt 0:00:07]} 19. Nh2 {
[%emt 0:00:00]} a5 {[%emt 0:02:36]} 20. a3 {[%emt 0:00:00]} Qc7 {[%emt 0:01:10]
} 21. Ng4 {[%eval 4,18] [%emt 0:02:46]} Bb7 {[%emt 0:06:07]} 22. Nf5 {
[%eval 29,18] [%emt 0:09:44]} Bxe4 {(a4) [%emt 0:01:18]} 23. Rxe4 {
[%eval 176,16] [%emt 0:02:04]} Nxe4 {[%emt 0:01:31]} 24. Ngxh6+ {
[%eval 181,17] [%emt 0:01:08]} Kh7 {[%emt 0:00:12]} 25. Nxf7 {
[%eval 181,18] [%emt 0:01:39]} Ndf6 {[%emt 0:01:15]} 26. Ng5+ {
[%eval 181,18] [%emt 0:00:11]} Nxg5 {[%emt 0:03:41]} 27. Bxg5 {
[%eval 212,19] [%emt 0:00:41]} Kh8 {(a4) [%emt 0:02:16]} 28. bxa5 {
[%eval 238,18] [%emt 0:01:08]} Red8 {(d5) [%emt 0:00:08]} 29. Nh4 {
[%eval 262,17] [%emt 0:00:30]} d5 {[%emt 0:01:23]} 30. Ng6+ {
[%eval 315,18] [%emt 0:01:36]} Kh7 {[%emt 0:00:58]} 31. Bxf6 {
[%eval 360,19] [%emt 0:05:07]} gxf6 {[%emt 0:00:07]} 32. Nxf8+ {
[%eval 360,19] [%emt 0:02:33]} Rxf8 {[%emt 0:00:47]} 33. Bxd5 {
[%eval 404,19] [%emt 0:08:37]} Rad8 {(Rxa5) [%emt 0:00:12]} 34. Rb1 {
[%eval 423,16] [%emt 0:00:49]} Kh8 {(Qf7) [%emt 0:03:48]} 35. Qh5+ {
[%eval 423,14] [%emt 0:00:01]} Qh7 {[%emt 0:00:52]} 36. Qxh7+ {
[%eval 500,19] [%emt 0:01:14]} Kxh7 {[%emt 0:00:07]} 37. Rxb5 {
[%eval 512,20] [%emt 0:08:19]} Rxd5 {[%emt 0:00:11]} 38. Rxd5 {
[%eval 500,19] [%emt 0:06:36]} Ra8 {[%emt 0:00:15]} 39. f3 {
[%eval 514,17] [%emt 0:04:47]} Ra6 {(Kg6) [%emt 0:00:50]} 40. Rb5 {
[%eval 512,15] [%emt 0:00:26]} Kg6 {(Rc6) [%emt 0:01:55]} 41. c4 {
[%eval 511,14] [%emt 0:00:01]} Rc6 {(Ra7) [%emt 0:01:52]} 42. c5 {
[%eval 511,14] [%emt 0:00:01]} Kg5 {[%emt 0:02:24]} 43. Kf2 {
[%eval 601,17] [%emt 0:00:00]} f5 {(Ra6) [%emt 0:01:13]} 44. Ke3 {
[%eval 706,15] [%emt 0:01:14]} Kh4 {[%emt 0:00:08]} 45. g4 {
[%eval 681,14] [%emt 0:00:06]} e4 {(f4+) [%emt 0:02:43]} 46. gxf5 {
[%eval 829,14] [%emt 0:00:17]} exf3 {[%emt 0:01:23]} 47. Kxf3 {
[%eval 887,17] [%emt 0:00:00]} Rh6 {(Kg5) [%emt 0:01:45]} 48. Rb6 {
[%eval 1098,14] [%emt 0:00:20]} Rh7 {[%emt 0:00:12]} 49. Kf4 {
[%eval 1272,14] [%emt 0:00:31]} Kxh3 {[%emt 0:01:16]} 50. c6 {
[%eval 1308,14] [%emt 0:00:01]} Rc7 {(Rh4+) [%emt 0:00:29]} 51. a6 {
[%eval 1480,13] [%emt 0:00:56]} Kg2 {[%emt 0:00:11]} 52. Ke5 {
[%eval 1584,11] [%emt 0:00:28]} Kf2 {(Kf3) [%emt 0:00:47]} 53. Kd6 {
[%eval 1990,14] [%emt 0:00:33]} Rh7 {[%emt 0:01:16]} 54. c7 {
[%eval 2361,14] [%emt 0:00:01]} Rh6+ {[%emt 0:00:29]} 55. Kc5 {
[%eval 2457,13] [%emt 0:00:07]} Rh8 {(Rh3) [%emt 0:02:47]} 56. Rb8 {
[%eval 2395,12] [%emt 0:00:12]} Rh1 {(Rh3) [%emt 0:00:52]} 57. a7 {
[%eval 2891,12] [%emt 0:00:24]} Rc1+ {[%emt 0:00:31]} 58. Kb6 {
[%eval 32751,12] [%emt 0:00:02]} Rb1+ {[%emt 0:02:08]} 59. Ka6 {
[%eval 32753,10] [%emt 0:00:00]} Rc1 {(Ra1) [%emt 0:00:40]} 60. c8=Q {
[%eval 32754,7] [%emt 0:00:01]} Rxc8 {[%emt 0:00:10]} 61. Rxc8 {
[%eval 32755,7] [%emt 0:00:00]} 1-0

[Event "ICT Leiden"]
[Site "Apeldoorn"]
[Date "2008.05.30"]
[Round "2"]
[White "Crash Test Dummy"]
[Black "Rybka"]
[Result "0-1"]
[ECO "D11"]
[PlyCount "114"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nbd2 Bf5 5. e3 e6 6. Nh4 Be4 7. f3 Bg6 8. Qb3
Qc7 9. Be2 Nbd7 10. Nf1 dxc4 11. Bxc4 c5 12. Bd2 O-O-O 13. Rc1 Kb8 14. Be2 Qd6
15. Qa3 cxd4 16. Qxd6+ Bxd6 17. exd4 Bc7 18. Ne3 Nb6 19. Bc3 Nbd5 20. Nxd5 Nxd5
21. g3 Rd6 22. Bd2 Bd8 23. Nxg6 hxg6 24. h4 Bf6 25. Rc4 Nb6 26. Rb4 Rxd4 27.
Rxd4 Bxd4 28. b3 Rd8 29. Ba5 Rd5 30. Bxb6 Bxb6 31. f4 Kc7 32. a4 a6 33. Bc4
Ba5+ 34. Ke2 Rd2+ 35. Kf3 Rb2 36. Rc1 Kd6 37. Kg4 Bb4 38. Rf1 Kc5 39. Rf3 Ba5
40. Re3 Kb4 41. Kf3 b5 42. axb5 axb5 43. Be2 Bb6 44. Re5 Rxb3+ 45. Kg2 Ka5 46.
h5 gxh5 47. Rxh5 Bd4 48. Rh8 b4 49. Ra8+ Kb6 50. Rd8 Bc5 51. Rb8+ Kc7 52. Rb5
Kc6 53. Rb8 Rb2 54. Kf3 f5 55. Rc8+ Kb6 56. Rg8 Rc2 57. Rd8 e5 0-1
Parent - - By Carl Bicknell (*****) [gb] Date 2008-05-30 17:21
Great Stuff!
What hardware are you running on? Hiarcs?
Parent - By Venator (Silver) [nl] Date 2008-05-30 17:26
Intel Skulltrail 8 x 4 GHz.
Parent - By Lukas Cimiotti (Bronze) [de] Date 2008-05-31 14:31
Hiarcs runs on a Skulltrail at 3.6 GHz, so there is not much difference in performance.

Regards,
Lukas
Parent - - By Venator (Silver) [nl] Date 2008-05-30 19:33
Round 3: in a nice Berlin Wall Rybka beat Deep Sjeng. In the final position Rybka announced mate in 21.

[Event "ICT Leiden"]
[Site "Apeldoorn"]
[Date "2008.05.30"]
[Round "?"]
[White "Rybka"]
[Black "Deep Sjeng"]
[Result "1-0"]
[ECO "C67"]
[PlyCount "109"]
[TimeControl "4500"]

{1MB, Leiden2.ctg, Intel Core Duo T2300} 1. e4 {[%emt 0:00:00]} e5 {
[%emt 0:00:07]} 2. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:06]} 3. Bb5 {
[%emt 0:00:00]} Nf6 {[%emt 0:00:06]} 4. O-O {[%emt 0:00:00]} Nxe4 {
[%emt 0:00:07]} 5. d4 {[%emt 0:00:00]} Nd6 {[%emt 0:00:07]} 6. Bxc6 {
[%emt 0:00:00]} dxc6 {[%emt 0:00:05]} 7. dxe5 {[%emt 0:00:00]} Nf5 {
[%emt 0:00:06]} 8. Qxd8+ {[%emt 0:00:00]} Kxd8 {[%emt 0:00:06]} 9. Nc3 {
[%emt 0:00:00]} Bd7 {[%emt 0:00:10]} 10. h3 {[%emt 0:00:00]} h6 {[%emt 0:00:06]
} 11. b3 {[%emt 0:00:00]} Kc8 {[%emt 0:00:06]} 12. Bb2 {[%emt 0:00:00]} b6 {
[%emt 0:00:05]} 13. Rad1 {[%emt 0:00:00]} Ne7 {[%emt 0:00:06]} 14. Ne2 {
[%eval 26,20] [%emt 0:04:29]} Ng6 {[%emt 0:03:57]} 15. Rd2 {
[%eval 25,19] [%emt 0:03:38]} c5 {[%emt 0:00:06]} 16. c4 {
[%eval 19,20] [%emt 0:05:49]} Bc6 {(Be7) [%emt 0:00:11]} 17. Ne1 {
[%eval 32,21] [%emt 0:01:11]} Kb7 {[%emt 0:01:08]} 18. f4 {
[%eval 31,21] [%emt 0:00:21]} Be7 {(Ne7) [%emt 0:02:33]} 19. f5 {
[%eval 45,21] [%emt 0:01:23]} Bg5 {[%emt 0:02:39]} 20. fxg6 {
[%eval 53,23] [%emt 0:02:31]} Bxd2 {[%emt 0:00:09]} 21. gxf7 {
[%eval 65,23] [%emt 0:03:36]} Bd7 {[%emt 0:00:09]} 22. e6 {
[%eval 65,24] [%emt 0:00:19]} Bxe6 {[%emt 0:00:59]} 23. Bxg7 {
[%eval 65,25] [%emt 0:04:18]} Bxf7 {[%emt 0:00:09]} 24. Bxh8 {
[%eval 56,25] [%emt 0:02:36]} Rxh8 {[%emt 0:00:07]} 25. Rxf7 {
[%eval 56,26] [%emt 0:02:08]} Bxe1 {[%emt 0:00:06]} 26. Kf1 {
[%eval 56,26] [%emt 0:00:37]} Bd2 {[%emt 0:00:50]} 27. Nf4 {
[%eval 63,25] [%emt 0:03:31]} Bxf4 {[%emt 0:01:31]} 28. Rxf4 {
[%eval 65,25] [%emt 0:00:28]} Rd8 {(h5) [%emt 0:00:33]} 29. Ke2 {
[%eval 71,23] [%emt 0:01:08]} Rd6 {(a5) [%emt 0:02:00]} 30. g4 {
[%eval 90,20] [%emt 0:00:17]} a5 {[%emt 0:02:17]} 31. h4 {
[%eval 124,24] [%emt 0:01:58]} Kc8 {[%emt 0:00:06]} 32. h5 {
[%eval 144,23] [%emt 0:01:27]} Kb7 {[%emt 0:01:27]} 33. Ke3 {
[%eval 150,24] [%emt 0:01:46]} a4 {[%emt 0:02:55]} 34. bxa4 {
[%eval 150,26] [%emt 0:03:12]} Re6+ {(Ka6) [%emt 0:00:12]} 35. Re4 {
[%eval 190,21] [%emt 0:00:20]} Rf6 {[%emt 0:00:54]} 36. Re5 {
[%eval 231,24] [%emt 0:02:11]} Rf1 {(Ka6) [%emt 0:00:54]} 37. Ke4 {
[%eval 240,22] [%emt 0:00:01]} Rc1 {(Rf2) [%emt 0:02:19]} 38. Kf5 {
[%eval 241,24] [%emt 0:00:40]} Rxc4 {[%emt 0:00:33]} 39. Re4 {
[%eval 235,24] [%emt 0:00:05]} Rc2 {(Rc1) [%emt 0:02:01]} 40. g5 {
[%eval 243,22] [%emt 0:00:01]} hxg5 {[%emt 0:02:00]} 41. h6 {
[%eval 244,26] [%emt 0:00:17]} Rxa2 {(g4) [%emt 0:00:45]} 42. Kxg5 {
[%eval 243,22] [%emt 0:00:01]} Rd2 {(Rg2+) [%emt 0:01:21]} 43. Rh4 {
[%eval 383,25] [%emt 0:00:39]} Rg2+ {[%emt 0:01:41]} 44. Kf6 {
[%eval 457,25] [%emt 0:00:00]} Rf2+ {[%emt 0:01:23]} 45. Kg6 {
[%eval 501,25] [%emt 0:01:55]} Rg2+ {[%emt 0:00:16]} 46. Kh5 {
[%eval 501,25] [%emt 0:00:45]} Rg8 {[%emt 0:00:59]} 47. h7 {
[%eval 501,23] [%emt 0:03:05]} Rh8 {[%emt 0:00:09]} 48. Kg6 {
[%eval 501,23] [%emt 0:03:19]} Ka6 {(Kc6) [%emt 0:00:11]} 49. Kg7 {
[%eval 509,20] [%emt 0:00:46]} Re8 {(Rd8) [%emt 0:00:36]} 50. h8=Q {
[%eval 501,19] [%emt 0:00:01]} Rxh8 {[%emt 0:01:54]} 51. Rxh8 {
[%eval 509,19] [%emt 0:00:00]} c4 {[%emt 0:00:58]} 52. Kf6 {
[%eval 32736,19] [%emt 0:00:00]} Ka5 {[%emt 0:01:55]} 53. Rh4 {
[%eval 32741,18] [%emt 0:00:00]} Kb4 {[%emt 0:01:02]} 54. Ke5 {
[%eval 32743,18] [%emt 0:00:00]} Kb3 {[%emt 0:01:25]} 55. Rh6 {
[%eval 32745,16] [%emt 0:00:00]} 1-0
Parent - - By turbojuice1122 (Gold) [us] Date 2008-05-30 19:48
Hmmm...with both scores at 3.0, it must be that you'll play Hiarcs first thing tomorrow...I sure hope that you have something good prepared... :-) :-)
Parent - By Carl Bicknell (*****) [gb] Date 2008-05-30 22:32
me too. The Hiarcs - King game was lively
Parent - - By Roland Rösler (****) [de] Date 2008-05-31 00:44
I sure hope that you have something good prepared...

I´m anxious about it :-). I´m not interested in opening battles. My hope: Hiarcs comes slightly better out of the opening, lost her advantage in the middlegame and is crushed by Rybka in the endgame with the bishop pair! :-)
Parent - By M ANSARI (*****) [kw] Date 2008-05-31 05:24
Very sadistic :)
Parent - - By Laszlo (***) [fr] Date 2008-05-31 05:57
Nice strategie. Nice engame play. Could we follow in live somewhere the Hiarcs-Rybka game?
Parent - By Harvey Williamson (*****) Date 2008-05-31 07:04
All Hiarcs and Rybka games are live in the Broadcast room on Playchess
Parent - - By Venator (Silver) [nl] Date 2008-05-31 09:48
Game 4 was a tough draw against Hiarcs. I am not sure Rybka played the right moves after the opening, it looked white had enough compensation all the time. At one point Hiarcs expected the freeing move c6-c5!? which looked more logical. In any case Rybka showed 0,00 all the time, so the draw was the most logical outcome.

[Event "ICT Leiden"]
[Site "Apeldoorn"]
[Date "2008.05.31"]
[Round "4"]
[White "Hiarcs"]
[Black "Rybka"]
[Result "1/2-1/2"]
[ECO "D43"]
[PlyCount "88"]
[TimeControl "4500"]

{1MB, Leiden3.ctg, Intel Core Duo T2300} 1. d4 {[%emt 0:00:00]} d5 {
[%emt 0:00:00]} 2. c4 {[%emt 0:00:08]} c6 {[%emt 0:00:00]} 3. Nc3 {
[%emt 0:00:10]} Nf6 {[%emt 0:00:00]} 4. Nf3 {[%emt 0:00:10]} e6 {[%emt 0:00:00]
} 5. Bg5 {[%emt 0:00:08]} h6 {[%emt 0:00:00]} 6. Bh4 {[%emt 0:00:08]} dxc4 {
[%emt 0:00:00]} 7. e4 {[%emt 0:00:10]} g5 {[%emt 0:00:00]} 8. Bg3 {
[%emt 0:00:10]} b5 {[%emt 0:00:00]} 9. Be2 {[%emt 0:00:10]} Bb7 {[%emt 0:00:00]
} 10. Ne5 {[%emt 0:00:09]} Nbd7 {[%emt 0:00:00]} 11. Qc2 {[%emt 0:00:10]} Bg7 {
[%emt 0:00:00]} 12. h4 {[%emt 0:00:09]} Qe7 {[%eval -33,17] [%emt 0:05:31]} 13.
Nxd7 {(0-0-0) [%emt 0:02:26]} Nxd7 {[%eval -31,18] [%emt 0:03:03]} 14. e5 {
(hxg5) [%emt 0:00:14]} O-O-O {[%eval -33,18] [%emt 0:01:47]} 15. O-O-O {
(a4) [%emt 0:01:56]} Kb8 {[%eval -28,17] [%emt 0:01:47]} 16. Kb1 {
(Qd2) [%emt 0:01:26]} Ka8 {[%eval -30,17] [%emt 0:01:56]} 17. hxg5 {
[%emt 0:02:10]} hxg5 {[%eval -23,20] [%emt 0:00:13]} 18. Rxh8 {[%emt 0:01:54]}
Rxh8 {[%eval -23,21] [%emt 0:10:03]} 19. Ne4 {(Qd2) [%emt 0:00:13]} Bf8 {
[%eval -4,20] [%emt 0:09:57]} 20. Qd2 {[%emt 0:02:08]} Rg8 {
[%eval -1,21] [%emt 0:04:40]} 21. Qa5 {[%emt 0:00:12]} Bg7 {
[%eval 0,20] [%emt 0:01:35]} 22. b3 {(Nd6) [%emt 0:02:57]} cxb3 {
[%eval 0,17] [%emt 0:01:40]} 23. axb3 {[%emt 0:00:18]} f5 {
[%eval 0,18] [%emt 0:00:05]} 24. exf6 {[%emt 0:02:50]} Nxf6 {
[%eval 0,21] [%emt 0:03:31]} 25. Bd6 {[%emt 0:01:54]} Qd8 {
[%eval 0,21] [%emt 0:00:35]} 26. Bc7 {[%emt 0:01:42]} Qd5 {
[%eval 0,21] [%emt 0:03:15]} 27. Nc5 {[%emt 0:00:09]} Bf8 {
[%eval 0,21] [%emt 0:00:51]} 28. Bb6 {[%emt 0:01:04]} a6 {
[%eval 0,22] [%emt 0:03:39]} 29. Bf3 {[%emt 0:00:12]} Qf5+ {
[%eval 0,20] [%emt 0:00:22]} 30. Kb2 {[%emt 0:01:31]} Bxc5 {
[%eval 0,21] [%emt 0:02:24]} 31. Bxc6 {(Bxc5) [%emt 0:00:15]} Qxf2+ {
[%eval 0,15] [%emt 0:00:09]} 32. Ka1 {[%emt 0:01:01]} Kb8 {
[%eval 0,20] [%emt 0:02:23]} 33. dxc5 {[%emt 0:00:10]} Nd5 {
[%eval 0,19] [%emt 0:00:14]} 34. Bc7+ {[%emt 0:01:41]} Kc8 {
[%eval 0,20] [%emt 0:01:13]} 35. Bxd5 {[%emt 0:00:14]} Bxd5 {
[%eval 0,20] [%emt 0:02:07]} 36. Bd6 {(Bb6) [%emt 0:00:13]} Qf7 {
[%eval 1,16] [%emt 0:00:18]} 37. Rc1 {(Kb2) [%emt 0:02:57]} Rd8 {
[%eval 1,16] [%emt 0:00:25]} 38. Kb2 {(Ka2) [%emt 0:01:57]} Qg7+ {
[%eval 1,16] [%emt 0:00:17]} 39. Ka3 {[%emt 0:02:46]} Qb7 {
[%eval 2,21] [%emt 0:00:00]} 40. Rf1 {(Re1) [%emt 0:02:06]} Bxg2 {
[%eval 0,18] [%emt 0:00:19]} 41. Rg1 {[%emt 0:00:56]} Rd7 {
[%eval 0,19] [%emt 0:00:26]} 42. Qd2 {[%emt 0:00:11]} b4+ {
[%eval 0,19] [%emt 0:00:17]} 43. Qxb4 {[%emt 0:01:40]} Qxb4+ {
[%eval 0,25] [%emt 0:00:14]} 44. Kxb4 {[%emt 0:00:11]} Rb7+ {
[%eval 0,26] [%emt 0:00:10]} 1/2-1/2
Parent - - By Vasik Rajlich (Silver) [hu] Date 2008-05-31 10:19
Hi Jeroen,

I checked this position on move 19. 19. .. c5 is just a draw - actually, quite a spectacular one. Have a look here:

http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=4227

19. .. Bf8 is a bit awkward, but black needs to hold on to g5 if he wants to avoid the above draw.

Good luck the rest of the way.

Vas
Parent - By urodets (**) [ua] Date 2008-05-31 11:02
Hmm... 22.b3 looks not the best move by HIARCS. interesting what could be if white played 22.a4!Nb6 23.axb5 cxb5 24.Nd6 Qd7 25.Nxb5...? position looks drawish anyway , but at least evals not 0.00. (by Zappa mexico II)
Parent - By Venator (Silver) [nl] Date 2008-05-31 11:15
Hi Vas,

Yes, we checked 19... c5 as well. But indeed it looks like a draw again. In some lines we had a black king on b5 :-).

Regards, Jeroen
Parent - - By Arifur (**) [gb] Date 2008-05-31 11:01
I was watching the game on playchesss. Was Rybka's time management a bit odd? She took long time for some obviuos moves some times.
/Arifur
Parent - - By Ernst (***) [nl] Date 2008-05-31 11:09 Edited 2008-05-31 11:25
It seemed that way, but we must not forget that the relay at playchess was done by hand. Vas explained move 18 and move 28 (which took long at playchess iirc) didn't take that long either.
Parent - By Vasik Rajlich (Silver) [hu] Date 2008-06-01 08:09
Actually, this is dramatically improved for Rybka 3, but I haven't touched that code for several months and so we used the proven solution here. No need for a repeat of last year's Leiden ICT ..

Vas
Parent - - By Venator (Silver) [nl] Date 2008-05-31 14:06
In round 5 Rybka won against Diep and is at 4.5 points now. The win was lucky, as the rook ending looked tenable for black. But 42... g6? and the plan to go for the white a-pawn was quickly losing. Hiarcs loses against Deep Sjeng this round, so that means Rybka has the sole lead with 4.5 with Deep Sjeng in second place with 4.0.

[Event "Leiden ICT"]
[Site "Apeldoorn"]
[Date "2008.05.31"]
[Round "5"]
[White "Rybka"]
[Black "Diep"]
[Result "1-0"]
[ECO "C42"]
[PlyCount "101"]
[TimeControl "4500"]

{1MB, Leiden3.ctg, Intel Core Duo T2300} 1. e4 {[%emt 0:00:00]} e5 {
[%emt 0:00:10]} 2. Nf3 {[%emt 0:00:00]} Nf6 {[%emt 0:00:10]} 3. Nxe5 {
[%emt 0:00:00]} d6 {[%emt 0:00:10]} 4. Nf3 {[%emt 0:00:00]} Nxe4 {
[%emt 0:00:08]} 5. d4 {[%emt 0:00:00]} d5 {[%emt 0:00:12]} 6. Bd3 {
[%emt 0:00:00]} Nc6 {[%emt 0:00:09]} 7. O-O {[%emt 0:00:00]} Be7 {
[%emt 0:00:14]} 8. c4 {[%emt 0:00:00]} Nb4 {[%emt 0:00:12]} 9. Be2 {
[%emt 0:00:00]} O-O {[%emt 0:00:08]} 10. Nc3 {[%emt 0:00:00]} Be6 {
[%emt 0:00:14]} 11. Ne5 {[%emt 0:00:00]} c5 {[%emt 0:00:11]} 12. Nxe4 {
[%emt 0:00:00]} dxe4 {[%emt 0:00:12]} 13. d5 {[%emt 0:00:00]} Qc7 {
[%emt 0:00:09]} 14. f4 {[%emt 0:00:00]} exf3 {[%emt 0:01:51]} 15. Nxf3 {
[%emt 0:00:00]} Bf5 {[%emt 0:03:42]} 16. Ne1 {[%emt 0:00:00]} Be4 {
[%emt 0:05:24]} 17. a3 {[%eval 59,20] [%emt 0:03:10]} Na6 {[%emt 0:00:10]} 18.
Bd3 {[%eval 60,21] [%emt 0:01:14]} f5 {[%emt 0:02:08]} 19. Bf4 {
[%eval 60,22] [%emt 0:01:33]} Bd6 {[%emt 0:04:50]} 20. Bxd6 {
[%eval 60,23] [%emt 0:02:31]} Qxd6 {[%emt 0:01:39]} 21. Qb3 {
[%eval 60,23] [%emt 0:11:27]} Nc7 {(b6) [%emt 0:01:44]} 22. Bxe4 {
[%eval 69,19] [%emt 0:00:42]} fxe4 {[%emt 0:02:27]} 23. Nc2 {
[%eval 69,22] [%emt 0:03:37]} b6 {[%emt 0:00:10]} 24. Qh3 {
[%eval 74,21] [%emt 0:04:56]} Qe5 {[%emt 0:01:35]} 25. Ne3 {
[%eval 74,21] [%emt 0:07:23]} b5 {(Rxf1+) [%emt 0:02:04]} 26. b3 {
[%eval 60,20] [%emt 0:07:30]} a5 {[%emt 0:00:09]} 27. Rad1 {
[%eval 76,20] [%emt 0:02:52]} a4 {(Rxf1+) [%emt 0:02:23]} 28. Qd7 {
[%eval 61,17] [%emt 0:01:14]} Rxf1+ {(axb3) [%emt 0:02:36]} 29. Rxf1 {
[%eval 62,17] [%emt 0:00:19]} Rf8 {(h6) [%emt 0:01:42]} 30. bxa4 {
[%eval 120,16] [%emt 0:00:56]} bxc4 {(Rxf1+) [%emt 0:03:09]} 31. Nf5 {
[%eval 113,18] [%emt 0:00:56]} Kh8 {[%emt 0:00:32]} 32. Qe7 {
[%eval 113,20] [%emt 0:00:32]} Qxe7 {[%emt 0:00:51]} 33. Nxe7 {
[%eval 114,22] [%emt 0:00:06]} Ra8 {[%emt 0:01:31]} 34. Rf4 {
[%eval 104,24] [%emt 0:03:06]} c3 {[%emt 0:01:11]} 35. Rxe4 {
[%eval 104,25] [%emt 0:02:48]} Rd8 {[%emt 0:00:12]} 36. Re3 {
[%eval 111,20] [%emt 0:00:12]} c2 {[%emt 0:01:20]} 37. Rc3 {
[%eval 104,25] [%emt 0:00:29]} Nxd5 {[%emt 0:01:08]} 38. Nxd5 {
[%eval 109,26] [%emt 0:00:07]} Rxd5 {[%emt 0:00:59]} 39. Rxc2 {
[%eval 109,27] [%emt 0:01:01]} Kg8 {(g6) [%emt 0:01:05]} 40. Rc4 {
[%eval 110,22] [%emt 0:00:48]} Rd3 {(Rd1+) [%emt 0:02:11]} 41. a5 {
[%eval 100,23] [%emt 0:00:19]} Rxa3 {[%emt 0:01:48]} 42. Rxc5 {
[%eval 104,26] [%emt 0:01:03]} g6 {(Kf7) [%emt 0:00:11]} 43. Rc8+ {
[%eval 161,21] [%emt 0:00:18]} Kf7 {[%emt 0:01:26]} 44. Ra8 {
[%eval 181,25] [%emt 0:01:08]} Ke6 {[%emt 0:00:43]} 45. a6 {
[%eval 250,23] [%emt 0:00:45]} Kd6 {(Kf5) [%emt 0:00:46]} 46. a7 {
[%eval 311,21] [%emt 0:00:01]} Kc6 {[%emt 0:01:38]} 47. Rc8+ {
[%eval 386,21] [%emt 0:00:00]} Kb7 {[%emt 0:01:23]} 48. a8=Q+ {
[%eval 32740,20] [%emt 0:00:00]} Rxa8 {[%emt 0:02:20]} 49. Rxa8 {
[%eval 32741,21] [%emt 0:00:00]} Kxa8 {[%emt 0:00:59]} 50. Kf2 {
[%eval 1,3] [%emt 0:00:00]} Kb7 {[%emt 0:01:14]} 51. Kg3 {
[%eval 1,3] [%emt 0:00:01]} 1-0
Parent - - By Kappatoo (*****) [de] Date 2008-05-31 14:23 Edited 2008-05-31 14:31
Why is 42....g6 losing? Isn't this simply a draw if black's king stays at the kingside?

Edit: If I'm not missing something very basic, this is a horrible evaluation problem: Rybka plays 43.Rf8+ (which is a bad move, in my view), intending to play 44.Ra8 followed by a6 and a7 and thinks she is completely winning! But there are absolutely no winning chances for white if black just keeps his rook on the a file, his king on g7 (and h7 after, say, h5 at some point) and keeps checking white's king whenever he covers his a pawn with the king. And the way black played this ...
Parent - - By Venator (Silver) [nl] Date 2008-05-31 14:56
Yes, you are right. After g6 it is still a simple draw. Only the plan to catch the white a-pawn was losing. BTW, Diep played without TB.
Parent - - By Vasik Rajlich (Silver) [hu] Date 2008-06-01 08:16
It seems that it should be drawn, but Iweta and I went out to dinner last night and took a chessboard with us, to analyze this endgame, and white was winning as often as black was drawing. The most dangerous idea for white is 44. .. Ra2 45. g4!, and the best defense seems to be 45. .. g5!. If white can put a pawn on g5, black has serious problems.

Anyway, I don't really like white trading into this endgame or putting the rook on a8. What's worse, Rybka will still often play a6-a7. Larry and I are looking at it now.

Vas
Parent - By Dragon Mist (****) [hr] Date 2008-06-01 09:33
"... but Iweta and I went out to dinner last night and took a chessboard with us, to analyze this endgame, ..."

??!!! :-)

Dragon Mist
Parent - - By Venator (Silver) [nl] Date 2008-06-01 09:47
I agree. With the rook standing on c5, white has to safeguard one of his K-side pawns. White should have refrained from Rc8+ and try h2-h4, Kg1-h2 instead and reach the position with a pawn on g5. Black must prevent this, but IMO this is very hard to understand for a computer program, especially without TB.
Parent - By Vasik Rajlich (Silver) [hu] Date 2008-06-01 17:44
This is going to be a tricky one to teach to Rybka. Larry will try a few tweaks before Rybka 3, and then we'll look at it more deeply for Rybka 4.

Vas
Parent - - By Kappatoo (*****) [de] Date 2008-06-01 10:06
My first point would be that black's Kf7 was slightly inaccurate. If he had placed his king on g7, white doesn't even get to play 45.g4, because black can then play ...Kh6.

But okay, let's say that black's king is on f7. I still think that after 45.g4 g5, white doesn't have the slightest winning chances. This is actually very easy to defend.

And yes, putting the rook to a8 is not a good idea. But I assume that if Rybka didn't like playing a7, she wouldn't play this. Generally, I can't imagine that she doesn't understand that the rook is more active on the fifth rank. There is probably a very high bonus for a passed pawn on the seventh rank, even with her own rook blocking the queening square.
Parent - - By AsosLight (***) [gr] Date 2008-06-01 11:04
+1. Theoretical draw of course!
But nothing wrong with Kf7 why inaccurate?
Parent - By Kappatoo (*****) [de] Date 2008-06-01 11:11
Well, as I said, it's completely drawn in both cases, so I prefer Kg7 for esthetical reasons. :) Vas said that white can try g4, which doesn't make sense with a black king on g7 - because of Kh6. But of course you are right, nothing wrong with Kf7.
Parent - - By Felix Kling (Gold) [de] Date 2008-05-31 15:05
yes, rybka doesn't know that the rook in  front of a pawn in such an ending is just a draw- i guess the pawn gets a high bonus for being on the 7th rank.
Parent - By Juergen Faas (**) [de] Date 2008-05-31 16:48

>> yes, rybka doesn't know that the rook in  front of a pawn in such an ending is just a draw <<


Ok, let´s hope that Rybka 4 will be taught this stuff... :)
Jürgen
Parent - - By Venator (Silver) [nl] Date 2008-05-31 17:19
In round 6 Rybka won with black against the King. 5.e3 is not the best move, after which 5... d5! equalises immediately. When The King missed 14.d5! (=) it was quickly outplayed. Another Rybka win in an ending :-). Rybka leads with 5.5, 2nd is Deep Sjeng with 5.0 and third Hiarcs with 4.5. See you tomorrow.

[Event "ICT Leiden"]
[Site "Apeldoorn"]
[Date "2008.05.31"]
[Round "6"]
[White "The King"]
[Black "Rybka"]
[Result "0-1"]
[ECO "A25"]
[PlyCount "112"]
[TimeControl "4500"]

{1MB, Leiden2.ctg, Intel Core Duo T2300} 1. c4 {[%emt 0:00:00]} Nf6 {
[%emt 0:00:01]} 2. Nc3 {[%emt 0:00:10]} e5 {[%emt 0:00:00]} 3. g3 {
[%emt 0:00:08]} Nc6 {[%emt 0:00:00]} 4. Bg2 {[%emt 0:00:08]} Bc5 {
[%emt 0:00:00]} 5. e3 {[%emt 0:00:10]} d5 {[%emt 0:00:00]} 6. cxd5 {
[%emt 0:03:13]} Nb4 {[%emt 0:00:00]} 7. d4 {[%emt 0:00:00]} exd4 {
[%emt 0:00:00]} 8. exd4 {[%emt 0:01:29]} Be7 {[%emt 0:00:00]} 9. Nge2 {
[%emt 0:02:05]} Nbxd5 {[%eval 19,19] [%emt 0:01:51]} 10. Nxd5 {
(Nf4) [%emt 0:03:25]} Nxd5 {[%eval 5,19] [%emt 0:00:43]} 11. O-O {
[%emt 0:01:53]} Be6 {[%eval 8,20] [%emt 0:00:14]} 12. Nf4 {[%emt 0:01:44]} Nxf4
{[%eval 6,21] [%emt 0:01:40]} 13. Bxf4 {[%emt 0:00:09]} c6 {
[%eval 6,22] [%emt 0:03:22]} 14. Re1 {(d5) [%emt 0:00:14]} O-O {
[%eval -9,16] [%emt 0:00:29]} 15. Be4 {(a3) [%emt 0:01:16]} g6 {
[%eval -18,19] [%emt 0:02:34]} 16. Bg2 {(Be5) [%emt 0:01:48]} Bf6 {
[%eval -44,19] [%emt 0:01:30]} 17. Be5 {[%emt 0:01:54]} Bxe5 {
[%eval -50,22] [%emt 0:04:21]} 18. dxe5 {[%emt 0:00:10]} Qb6 {
[%eval -48,22] [%emt 0:08:16]} 19. b3 {(Qe2) [%emt 0:00:11]} Rfd8 {
[%eval -63,22] [%emt 0:06:46]} 20. Qe2 {[%emt 0:00:08]} Rd4 {
[%eval -63,22] [%emt 0:00:46]} 21. Rad1 {[%emt 0:00:59]} Rad8 {
[%eval -63,22] [%emt 0:04:56]} 22. Rxd4 {[%emt 0:01:00]} Qxd4 {
[%eval -63,22] [%emt 0:00:49]} 23. Bf1 {(Qf1) [%emt 0:02:39]} Qc3 {
[%eval -111,20] [%emt 0:01:03]} 24. Qe3 {(Qe4) [%emt 0:03:25]} Qxe3 {
[%eval -145,23] [%emt 0:06:40]} 25. Rxe3 {(fxe3) [%emt 0:00:21]} Rd1 {
[%eval -132,21] [%emt 0:00:01]} 26. Kg2 {[%emt 0:01:29]} Bd5+ {
[%eval -152,23] [%emt 0:04:07]} 27. f3 {[%emt 0:00:16]} Ra1 {
[%eval -164,24] [%emt 0:04:31]} 28. Re2 {[%emt 0:02:25]} Bxf3+ {
[%eval -167,24] [%emt 0:00:56]} 29. Kxf3 {[%emt 0:00:07]} Rxf1+ {
[%eval -167,25] [%emt 0:01:03]} 30. Kg2 {(Ke3) [%emt 0:00:43]} Rd1 {
[%eval -159,21] [%emt 0:00:23]} 31. Kf3 {[%emt 0:00:35]} Kf8 {
[%eval -167,23] [%emt 0:00:45]} 32. Ke4 {[%emt 0:00:43]} Rf1 {
[%eval -167,24] [%emt 0:02:32]} 33. Rd2 {[%emt 0:02:02]} Ke7 {
[%eval -170,26] [%emt 0:00:43]} 34. Ke3 {[%emt 0:00:30]} Re1+ {
[%eval -170,24] [%emt 0:02:06]} 35. Kf4 {[%emt 0:01:47]} c5 {
[%eval -168,24] [%emt 0:00:24]} 36. h3 {(h4) [%emt 0:01:25]} b6 {
[%eval -172,21] [%emt 0:00:23]} 37. g4 {[%emt 0:00:27]} h6 {
[%eval -161,22] [%emt 0:00:06]} 38. Rd3 {[%emt 0:00:55]} Ra1 {
[%eval -175,24] [%emt 0:00:32]} 39. Rd2 {[%emt 0:01:31]} Rh1 {
[%eval -171,25] [%emt 0:00:23]} 40. Rd3 {[%emt 0:01:01]} Rh2 {
[%eval -171,26] [%emt 0:00:48]} 41. a4 {[%emt 0:00:40]} Rc2 {
[%eval -171,26] [%emt 0:01:05]} 42. a5 {[%emt 0:00:08]} bxa5 {
[%eval -171,24] [%emt 0:00:19]} 43. Ke4 {(Rd6) [%emt 0:00:47]} Ra2 {
[%eval -171,22] [%emt 0:00:15]} 44. Rc3 {(Rf3) [%emt 0:00:58]} a4 {
[%eval -190,18] [%emt 0:00:04]} 45. bxa4 {[%emt 0:00:38]} Rxa4+ {
[%eval -201,23] [%emt 0:00:47]} 46. Kd5 {[%emt 0:00:07]} c4 {
[%eval -211,23] [%emt 0:00:00]} 47. h4 {(Re3) [%emt 0:01:00]} a5 {
[%eval -203,19] [%emt 0:00:04]} 48. h5 {[%emt 0:01:06]} gxh5 {
[%eval -214,25] [%emt 0:00:09]} 49. gxh5 {[%emt 0:00:25]} Rb4 {
[%eval -234,25] [%emt 0:00:47]} 50. Rf3 {[%emt 0:00:23]} Rb5+ {
[%eval -289,23] [%emt 0:00:40]} 51. Kd4 {[%emt 0:00:44]} a4 {
[%eval -309,22] [%emt 0:00:11]} 52. Kxc4 {(Ra3) [%emt 0:00:30]} Rxe5 {
[%eval -308,15] [%emt 0:00:03]} 53. Kb4 {[%emt 0:00:40]} Rxh5 {
[%eval -346,21] [%emt 0:00:00]} 54. Kxa4 {[%emt 0:00:47]} Rh1 {
[%eval 1,3] [%emt 0:00:00]} 55. Re3+ {[%emt 0:01:15]} Kf8 {
[%eval 1,3] [%emt 0:00:00]} 56. Kb3 {(Kb4) [%emt 0:00:49]} h5 {
[%eval -32743,3] [%emt 0:00:01]} 0-1
Parent - - By Venator (Silver) [nl] Date 2008-06-01 09:44
A nice win in round 7 against Hansdampf, the former 'Isichess'. Black already went wrong with 10... d5?, after which Rybka made a very strong exchange sacrifice and cashed in the game quite nicely. Very funny is the position after move 15, with 2 black pieces on a1 and b1 :-).

A Hiarcs loses this round against Diep, we will get Rybka at 1st with 6.5 followed by Deep Sjeng at 6.0 and Diep & Hiarcs tied with 4.5.

[Event "ICT Leiden"]
[Site "Apeldoorn"]
[Date "2008.06.01"]
[Round "7"]
[White "Rybka"]
[Black "Hansdampf"]
[Result "1-0"]
[ECO "A31"]
[PlyCount "71"]
[TimeControl "4500"]

{1MB, Leiden2.ctg, Intel Core Duo T2300} 1. Nf3 {[%emt 0:00:00]} c5 {
[%emt 0:00:11]} 2. c4 {[%emt 0:00:00]} Nc6 {[%emt 0:00:11]} 3. d4 {
[%emt 0:00:00]} cxd4 {[%emt 0:00:08]} 4. Nxd4 {[%emt 0:00:00]} Nf6 {
[%emt 0:00:07]} 5. g3 {[%emt 0:00:00]} e5 {[%emt 0:00:08]} 6. Nb5 {
[%emt 0:00:00]} a6 {[%emt 0:02:02]} 7. Nd6+ {[%eval 21,20] [%emt 0:01:36]} Bxd6
{[%emt 0:01:17]} 8. Qxd6 {[%eval 24,21] [%emt 0:00:46]} Ne4 {[%emt 0:02:45]} 9.
Qd3 {[%eval 27,21] [%emt 0:00:10]} Nc5 {[%emt 0:00:54]} 10. Qd1 {
[%eval 29,20] [%emt 0:01:27]} d5 {(d6) [%emt 0:00:26]} 11. cxd5 {
[%eval 89,19] [%emt 0:01:30]} Nd4 {[%emt 0:01:00]} 12. Bg2 {
[%eval 98,20] [%emt 0:01:01]} Bf5 {[%emt 0:04:26]} 13. O-O {
[%eval 108,21] [%emt 0:00:04]} Nc2 {(Bc2) [%emt 0:00:59]} 14. b4 {
[%eval 126,18] [%emt 0:00:40]} Nxa1 {[%emt 0:00:56]} 15. bxc5 {
[%eval 146,20] [%emt 0:00:50]} Bxb1 {[%emt 0:00:35]} 16. Bb2 {
[%eval 150,20] [%emt 0:01:09]} Bg6 {[%emt 0:00:22]} 17. Bxa1 {
[%eval 150,20] [%emt 0:03:00]} f6 {[%emt 0:00:07]} 18. Qa4+ {
[%eval 158,21] [%emt 0:12:15]} Qd7 {[%emt 0:03:30]} 19. c6 {
[%eval 193,22] [%emt 0:02:18]} bxc6 {[%emt 0:00:31]} 20. dxc6 {
[%eval 193,22] [%emt 0:01:36]} Qc7 {[%emt 0:01:12]} 21. Bc3 {
[%eval 173,23] [%emt 0:07:57]} O-O {[%emt 0:00:24]} 22. Ba5 {
[%eval 192,23] [%emt 0:05:54]} Qf7 {[%emt 0:02:01]} 23. c7 {
[%eval 192,22] [%emt 0:04:22]} e4 {[%emt 0:02:12]} 24. Bh3 {
[%eval 198,23] [%emt 0:03:17]} f5 {[%emt 0:03:50]} 25. Rd1 {
[%eval 203,23] [%emt 0:01:00]} Rac8 {(Qf6) [%emt 0:01:47]} 26. Rd7 {
[%eval 245,18] [%emt 0:00:28]} Qf6 {[%emt 0:01:12]} 27. e3 {
[%eval 258,20] [%emt 0:00:42]} Bf7 {(Be8) [%emt 0:05:31]} 28. Qd4 {
[%eval 278,18] [%emt 0:00:01]} Qxd4 {(Be6) [%emt 0:01:17]} 29. exd4 {
[%eval 364,16] [%emt 0:00:17]} Bc4 {(Be6) [%emt 0:00:37]} 30. d5 {
[%eval 430,16] [%emt 0:00:15]} g6 {[%emt 0:01:38]} 31. g4 {
[%eval 500,20] [%emt 0:00:01]} h6 {(Rf7) [%emt 0:01:04]} 32. gxf5 {
[%eval 548,13] [%emt 0:00:11]} gxf5 {(Bb5) [%emt 0:01:59]} 33. d6 {
[%eval 619,14] [%emt 0:00:16]} Bb5 {[%emt 0:02:22]} 34. Re7 {
[%eval 705,19] [%emt 0:00:00]} Rf7 {[%emt 0:01:35]} 35. Rxf7 {
[%eval 726,20] [%emt 0:02:38]} Kxf7 {[%emt 0:01:44]} 36. Bxf5 {
[%eval 728,20] [%emt 0:00:51]} 1-0
Parent - - By Venator (Silver) [nl] Date 2008-06-01 12:26
A walkover in round 8 against Tjezzz.

[Event "ICT Leiden"]
[Site "Apeldoorn"]
[Date "2008.06.01"]
[Round "8"]
[White "Tjezzz"]
[Black "Rybka"]
[Result "0-1"]
[ECO "B80"]
[PlyCount "38"]
[TimeControl "4500"]

{1MB, Leiden2.ctg, Intel Core Duo T2300} 1. e4 {[%emt 0:00:00]} c5 {
[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:27]} d6 {[%emt 0:00:00]} 3. d4 {
[%emt 0:00:09]} cxd4 {[%emt 0:00:00]} 4. Nxd4 {[%emt 0:00:10]} Nf6 {
[%emt 0:00:00]} 5. Nc3 {[%emt 0:00:15]} a6 {[%emt 0:00:00]} 6. g3 {
[%emt 0:00:14]} e6 {[%emt 0:00:00]} 7. Bg2 {[%emt 0:00:11]} Be7 {[%emt 0:00:00]
} 8. Rg1 {[%emt 0:16:37]} O-O {[%eval -24,20] [%emt 0:03:01]} 9. Bf3 {
(Be3) [%emt 0:00:42]} Nbd7 {[%eval -45,18] [%emt 0:02:42]} 10. Bd2 {
(g4) [%emt 0:00:43]} Ne5 {[%eval -78,19] [%emt 0:01:35]} 11. Bf4 {
(Qe2) [%emt 0:01:52]} Nxf3+ {[%eval -109,18] [%emt 0:03:48]} 12. Nxf3 {
[%emt 0:00:42]} Qb6 {[%eval -101,20] [%emt 0:01:03]} 13. Qc1 {
(Qd3) [%emt 0:06:30]} Bd7 {[%eval -138,19] [%emt 0:03:17]} 14. Ng5 {
(Be3) [%emt 0:01:23]} d5 {[%eval -265,18] [%emt 0:01:56]} 15. Be3 {
(Nf3) [%emt 0:01:14]} d4 {[%eval -445,17] [%emt 0:00:35]} 16. Bd2 {
(Bxd4) [%emt 0:00:35]} dxc3 {[%eval -567,15] [%emt 0:03:31]} 17. Bxc3 {
[%emt 0:01:55]} e5 {[%eval -577,15] [%emt 0:00:37]} 18. Qd2 {
(Rf1) [%emt 0:01:26]} h6 {[%eval -595,14] [%emt 0:02:10]} 19. Bxe5 {
[%emt 0:00:40]} hxg5 {[%eval -632,14] [%emt 0:00:11]} 0-1
Parent - By sarciness (***) [gb] Date 2008-06-01 13:25
Are you kidding? That was truly awful play! Did they have some kind of problem?
Parent - - By turbojuice1122 (Gold) [us] Date 2008-06-01 13:36
Are these actually the correct moves?  I can see several where just analyzing as a human I award ?? or ?.  There must have been some sort of strange bug causing semi-random play?
Parent - - By Venator (Silver) [nl] Date 2008-06-01 15:43
Yes, the moves are correct. No bugs, this is just the way Tjezzz plays :-).
Parent - - By sarciness (***) [gb] Date 2008-06-01 15:59
How did such a (seemingly) crap engine get into such an event?
Parent - - By Harvey Williamson (*****) Date 2008-06-01 16:54
Because the programmer had spent time making an engine and he entered. The social side of these events and talking to other people about Computer Chess is often more important than the actual event.
Parent - - By sarciness (***) [gb] Date 2008-06-01 17:22
That's cool! So anyone can enter? If I were to take the time to write my own program, can I come? :)
Parent - By Carl Bicknell (*****) [gb] Date 2008-06-01 17:27
I think they should catergorise tournaments, especially the WCCC.
Parent - - By h.g.muller (****) [nl] Date 2008-06-01 18:15 Edited 2008-06-01 18:17
Indeed, any author can enter. Tzjezz is a program that made its first appearence only 6th month ago, in the Dutch Open 2007. Like with almost any engine, it will take the author many months to cure the most important bugss. Not everyone can spend all his time, or even his spare time, in developing a Chess engine. I am very happy that my own engine, Joker, is reasonably free of bugs now.

One should not forget that this is a tournament where people have to provide their own hardware, and that this fact alone makes some of the participants advantaged by a factor of 10 over others. Not every amateur can afford a 20,000-dollar 8-core machine, some are already happy to posses a laptop with 1.6GHz Pentium-M processor. Unfortunately it is usually the strongest programs that can avail themselves of the strongest hardware, making the games very biased.

But to get back to Tzjezz: it was clear that the program still contains a crippling bug. Although it was searching at 300knps, which isn't so bad considering the hardware it was running on, it was only reaching a search depth of 5 ply, which is way too low. But what is worse, in the game against Joker it was even overlooking material losses that already manifested themselves after 4 ply, which definitely should not be possible if it had done the 5-ply search correctly.
Parent - - By turbojuice1122 (Gold) [us] Date 2008-06-01 18:29
5 ply at 300 knps for Tzjezz?  Even with a brute-force search and an average of, say, 60 seconds per move, correct hashing techniques should be able to get through 9 ply on each move if we assume an average of 30 legal moves per position and therefore a branching factor of Sqrt(30) with hashing.
Parent - By Mark (****) [us] Date 2008-06-01 18:56
I suspect the author is obsfucating the depth and nps...  :-)
Parent - By h.g.muller (****) [nl] Date 2008-06-01 19:08

> 5 ply at 300 knps for Tzjezz?  Even with a brute-force search and an average of, say,
> 60 seconds per move, correct hashing techniques should be able to get through 9 ply


Exactly. So there must be a horrible bug somewhere. I believe the node count, it should be
hard to do worse, even in a very simple program.
Parent - - By Nelson Hernandez (Gold) [us] Date 2008-06-01 18:54
Hah!  $20,000 for 8 cores!!  I pity you poor guys in the EU and your crazy taxes!  You can get a perfectly serviceable octal in the US for $4000.
Parent - - By h.g.muller (****) [nl] Date 2008-06-01 19:09
Well, I was using future exchange rates.... ;-)
Parent - By Nelson Hernandez (Gold) [us] Date 2008-06-01 19:19
Better hire the Zimbabwean Treasury Minister for a high post in Brussels!
Parent - By Lukas Cimiotti (Bronze) [de] Date 2008-06-01 20:52
Well, we don't pay 300% taxes here in Germany as you might believe.
I could build you a really fast 8 cores Harpertown computer at a price below 1500€. But as the dollar atm is worth next to nothing, that might result in price of $2500.
Regards,
Lukas
Parent - - By NATIONAL12 (Gold) [gb] Date 2008-06-01 21:20
my Skulltrail cost $8000 in uk, however my Montecristo no 2 cost 12 euros in Amsterdam.
Parent - - By Nelson Hernandez (Gold) [us] Date 2008-06-01 21:48
Montecristo #2?  You are a man of distinction.  Top-grade cigar, there.  I just finished a Gurkha a moment ago.
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