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Subject: Shredder score during game in Graz

Author: K. Burcham

Date: 09:15:31 12/21/03



I am not sure when the operator of Jonny actually spoke up during the game.
I am not sure when Stefan actually spoke about this issue during the game.
I am not sure who the first person to speak of the issue during the game.

It seems from playing the game through each move with Shredder 7.04, that Stefan
was observing wild eval swings.
Stefan saw mate scores start around move 35.
Stefan saw his score go to 0 after Shredder moved 37.Rg4.
Stefan could see that his program had problems.
Stefan could see that Shredder allowed his opponent the three move repetition
rule for draw. Under normal circumstances this would be a draw by repetition.
The operator of Jonny decided that since his opponent had buggy program and
Jonny position was lost anyway, that he would just give Stefan the full point,
fully aware that Jonny would lose the game.

To me this sets a precedent:
1. A person can enter two programs in a tournament.
program A shows a problem so program B in a losing position gives full point to
program A.
2. A friend can give a full point during the game to another friend.
3. In the same situation, one program because of differences in the past does
not give full point.
4. now a rule will have to made, when can an operator give, and when can an
operator accept points.
5. someone will have to decide about other bugs. what bugs will allow an
operator to give a full point. what bugs will not be allowed to give a full
point.
6. if Stefan had problems in a losing position, would he had given a full point
to Jonny or other lower rated program?

some notes using Shredder 7.04
Shredder will not play 35.Rg4 as it did in game.
instead wants 35.Bc4 and shows mate in 24

 [D] 1rr3k1/p4q2/3Q4/8/4p2R/2p5/PPP1B2P/1K6 w - -


Shredder will not play 37.Rg4
if Shredder plays this move the eval goes to 0
but Shredder played this move in the game.

[D] 1rr3k1/p4q2/3Q4/8/4p2R/2p5/PPP1B2P/1K6 w - -

31...Qxf7  -9.05
32.Rxg6   +10.03
32...Kh7  -11.77
33.Rg4    +13.56
33...Rab8 -16.62
34. Rh4+  +26.40
34...Kg8  -26.40
35. Rg4+  will not play  mate in 24 with Bc4
35...Kh7  -18.55
36. Rh4+   M25
36...Kg8   M23
37. Rg4+   M23
37...Kh7   score drops to 0
38. Bc4    M29
38...Rxb2+ M29
39. Ka1    M36
39...Rxc4  M66
40. Rh4+   M66
40...Kg8   M12
41.Qd8     M12
41...Qf8   M11


[Event "WCCC 2003"]
[Site "Graz"]
[Date "2003.11.29"]
[Round "11"]
[White "Shredder"]
[Black "Jonny"]
[ECO "B80"]
[Result "1-0"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5
Be7 7. f4 O-O 8. Qf3 e5 9. Nf5 Bxf5 10. exf5 e4 11. Qh3 h6
12. Bh4 Qc7 13. g4 d5 14. g5 hxg5 15. fxg5 Nh5 16. O-O-O
Rc8 17. Bg3 Nf4 18. Bxf4 Qxf4+ 19. Kb1 Bxg5 20. f6 Nc6
21. fxg7 Kxg7 22. Be2 d4 23. Rhf1 Qh4 24. Qf5 dxc3 25. Rg1
Kf8 26. Rxg5 Ne7 27. Qf6 Qh7 28. Rd7 Ng6 29. Rxb7 Qg7
30. Qd6+ Kg8 31. Rxf7 Qxf7 32. Rxg6+ Kh7 33. Rg4 Rab8
34. Rh4+ Kg8 35. Rg4+ Kh7 36. Rh4+ Kg8 37. Rg4+ Kh7 38. Bc4
Rxb2+ 39. Ka1 Rxc4 40. Rh4+ Kg8 41. Qd8+ Qf8 42. Rg4+ Kf7
43. Qd7+ Qe7 44. Rf4+ Kg6 45. Qxe7 Rxa2+ 46. Kxa2 Ra4+
47. Kb3 Rb4+ 48. Kxb4 a5+ 49. Kxc3 a4 50. Qf6+ Kh5 51. Rh4#
1-0

kburcham




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