Author: Robert Hyatt
Date: 14:56:57 07/25/00
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On July 25, 2000 at 16:48:01, Ralf Elvsén wrote: >On July 25, 2000 at 14:52:06, Robert Hyatt wrote: > >> >> >>I don't see "big" holes. I had a chat with two GMs this week, in fact, and >>neither came up with any serious flaws they thought needed immediate attention, >>this for the first time in a couple of years that this has happened. This is >>not saying there are no holes... just no "gaping holes" that they noticed... >> >>Which is a good sign, as they had been reporting 'gaping holes' regularly until >>the last couple of months... Now we start on the 'sorta-gaping holes' I guess. >> >>:) > >From my somewhat less informed perspective I have to agree. I also >own Hiarcs and for that program I have a long list that I think >should be fixed, i.e. things I can see with my limited chess knowledge. >For Crafty, the holes are more difficult for me to put my finger on. >Although Hiarcs wins more often than not on my machine... > >Of course, there are sometimes I think Crafty misplays >some endgame positions with relatively few pieces. I have a nagging >supspicion this is because you always (?) use 5-man TBs and I >don't. Do you think it is possible that you miss "bugs" because >of this? Sure... a year or two ago, someone reported that it couldn't mate with B+N vs a lone king, yet I stole that code directly from Cray Blitz. But somewhere between putting it in, and last year, I screwed up a table of values, and sure enough, it couldn't mate without tablebases. I fixed it quickly and easily, but on my machine, it never happened as I always have tablebases around... > >I also think Crafty would do better in comp-comp games if it >valued space higher, but I know that's none of your priorities. It does in a way, but it doesn't understand it particularly well. The danger is that you wreck your pawns to get more space, and that can turn into an endgame nightmare... > >Btw, I hope you finally find the time to add those singular extensions. >If this makes Crafty tactically sharper (does it?) it will be even more >dangerous for the commercials. > >Ralf It should definitely be tactically sharper. Of course, there are costs as well, which makes it harder to evaluate.
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