Author: James T. Walker
Date: 18:15:47 11/12/99
Go up one level in this thread
On November 12, 1999 at 20:46:47, Christophe Theron wrote: >On November 12, 1999 at 20:27:45, James T. Walker wrote: > >>On November 12, 1999 at 11:54:32, Christophe Theron wrote: >> >>>On November 12, 1999 at 04:01:39, Bertil Eklund wrote: >>> >>>>On November 12, 1999 at 02:00:32, Ed Schröder wrote: >>>> >>>>>On November 11, 1999 at 20:18:18, Howard Exner wrote: >>>>> >>>>>>Here's the game which ended in a draw.[Event "SSDF 40-2"] >>>>>>[Site "DK-Albertslund"] >>>>>>[Date "1999.11.10"] >>>>>>[Round "23"] >>>>>>[White "Chess Tiger 12.0 dos K6-2 450,64"] >>>>>>[Black "Shredder 2 P200MMX 24+8"] >>>>>>[Result "1/2-1/2"] >>>>>>[WhiteElo "2645"] >>>>>>[BlackElo "2503"] >>>>>>[Annotator "Test: HC Lykke"] >>>>>> >>>>>>1. e4 c5 2. Nc3 d6 3. f4 Nc6 4. Nf3 Nf6 5. Bb5 e6 6. Bxc6+ >>>>>>bxc6 7. d3 Be7 8. e5 Nd5 9. Ne4 dxe5 10. Nxe5 Bb7 11. O-O >>>>>>O-O 12. Qe2 f6 13. Nc4 Ba6 14. Bd2 Nb6 15. Na5 Qd7 16. Be3 >>>>>>Na4 17. Qf2 c4 18. b3 f5 19. Nd2 cxd3 20. bxa4 Bb4 21. Nab3 >>>>>>dxc2 22. Rfe1 Rad8 23. a3 Bc3 24. Nc5 Qe7 25. Nxa6 Bxa1 26. >>>>>>Rxa1 Qxa3 27. Qe1 Qc3 28. Rc1 Rd3 29. Kf2 Qb2 30. Nc4 Qa2 >>>>>>31. Ne5 Rd1 32. Qc3 Rxc1 33. Bxc1 Qxa4 34. Nc5 Qa2 35. Ncd7 >>>>>>Re8 36. Qxc6 Rd8 37. Qc7 Ra8 38. Qb7 Rf8 39. Nxf8 Qa5 40. >>>>>>Qf7+ Kh8 41. Nxe6 Qb6+ 42. Kg3 Qb3+ 43. Kf2 Qb6+ 44. Ke2 >>>>>>Qa6+ 45. Kf2 Qb6+ 1/2-1/2 >>>>>> >>>>>>Would the game end the same from move 41 on if it were manually played? >>>>> >>>>>Rebel-Tiger (beta) plays of course 43.Kh4 announcing mate in 3. >>>>> >>>>>No 45.Kf2??? also but 45.Ke3 announcing mate in 5. >>>>> >>>>>Perhaps something is wrong with the PGN moves? >>>>> >>>>>Even in the end-position Rebel-Tiger (beta) still announces a >>>>>mate. >>>>> >>>>>Ed >>>>Hi! >>>> >>>>In one of my testgames Tiger used 30(!!) moves for a simple mate in 4 or 5 >>>>moves. Tiger won the game but after 10-15 moves with the same announcement mate >>>>in 4 or 5 I began to wonder if it should be a draw according to the 50-moves >>>>rule. >>>> >>>>Bertil SSDF >>> >>> >>>I have to say my 'mea culpa' here. >>> >>>The problem was not the engine in this case but the time manager. >>> >>>I have noticed during the French Championship last year that Tiger could spend a >>>long time before playing an obvious mate. In fact a mate move was considered as >>>any other move, so Tiger took his time to play it. This means probably one or >>>two minutes in a long time controls game. >>> >>>I thought that this was very bad manners for the opponent, so I decided to make >>>it more "elegant" and change the time management. >>> >>>The new version stopped to search as soon as a mate in X move was found. So in >>>this case it moved instantly. >>> >>>Great. But it is a bloody mistake. What happens? First, Tiger finds a mate in, >>>say, 5 moves. So it stops and announces "mate in 5". Then, on the next move, the >>>first mate it finds is a mate in 6. So it stupidly stopped and announced a mate >>>in 6, and was happy with it. >>> >>>This could be an infinite cycle, Tiger announcing mates in several moves, but >>>never actually checkmating the opponent. >>> >>>I have discovered this (old) bug on Nov 2, 1999, and it is now FIXED. The >>>current beta version does NOT have the bug, and that's why Ed cannot reproduce >>>it. >>> >>>Thanks to Howard Exner for pointing this out. >>> >>> >>> >>> Christophe >> >> >>I'm sure happy to 'hear' that's fixed. I'm waiting impatiently :-) for Chess >>Tiger to hit the streets. By the way, I got a glimpse of it on FICS and it is >>impressive. It seems like people/computers were standing in line to play it. >>Jim Walker > >Oops... I thought this was a non-public experiment. > >We are just stress-testing the beta version. The goal is just to let it play >several weeks in a row to check if everything runs smoothly (the engine, the GUI >and the Internet Chess Servers automatic management)... > >I'm not in charge of this experiment, so I don't even know what the result is >sofar. I mean in win, draws and losses. For the reliability part, I know that >the product has been running perfectly well since it has been connected (several >days ago IIRC). > > > Christophe It's hard to get on FICS and not be noticed. At any given time there are only a handfull of computers playing there. I played Chess Tiger using Fritz/Hiarcs combination. The first game went about 160 moves and something went wrong. I was never sure if it was my hardware or the other guy. Anyway the game was a book draw but I could not get a draw agreed to or even flag the game since both clocks expired. I finally resigned the game so I could try another one. I'm still waiting. :-) Jim Walker
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