Author: Robert Hyatt
Date: 07:43:01 09/11/01
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On September 11, 2001 at 10:27:40, Uri Blass wrote: >On September 11, 2001 at 10:19:31, Robert Hyatt wrote: > >>On September 11, 2001 at 08:51:20, K. Burcham wrote: >> >>> >>> >>> >>> >>>i understand your explanation for the Rg8 and the Rf5 moves bruce. >>>that deep blue might have seen a loss in both of those lines. >>> >>> >>>i only use the word blunder when during normal game mode or in >>> analysis mode the score will jump maybe 2 or more points, >>>when the next move is made. >>> >>>for example in this deep blue blunder SOS scores this position >>> black is down -1.65. at depth 15. you can see in the analysis that >>>the score imidiately jumps and climbs to +6.41 for white with 44. ...Rd1. >>> >>>in the case of the deep junior vs shredder, in the world championship >>> i have analyized the 5+ change in score. this was not a single >>> move blunder like defined above. in the deep junior game >>> shredder didnt have a clue of the deep pawn value and its ability >>> to stop them. then when it finally saw what was really going on >>>shredder started adjusting its eval very quickly, and the score jumped >>> 5+ points. >>> >>>and i am aware that you already knew all of this----i was just explaining >>> my logic for my applicaton of the word blunder. >> >>this just means that SOS doesn't understand the position yet. When I ran >>this, I got +3.5 or so. On Rd1 my score gets significantly worse. Which >>simply means that they probably searched the alternatives deeper than I did >>and found that they were bad also. > >I rememeber that they admitted that Rd1 was result of a bug. >Their score for Rd1(-1.80) does not make sense >in every reasonable depth > >They did not play Rd1 because they found >that the alternative is worse. > >Uri I don't believe -180 is the "score" I think it is an indication of a fail high. They didn't resolve a fail high unless a second fail-high occurred, since knowing that A is better than B is enough to play A. If you know that A and B are both better than C, then you have to re-search A and B to find out which is the better move. I believe their bug was in the code that handled this when a time-out occurred.
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