Author: Christophe Theron
Date: 00:27:19 11/13/99
Go up one level in this thread
On November 12, 1999 at 21:15:47, James T. Walker wrote:
>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
Maybe Lex (who is doing these experiments) decided that he needed the computer
for some other test...
Maybe he was there and has seen that your draw offer was not accepted and has
decided to change something...
I don't know exactly.
Christophe
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