Author: blass uri
Date: 20:53:40 04/06/00
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On April 06, 2000 at 22:09:29, Robert Hyatt wrote: <snipped> > A solution is known, >and has been known for many years (store both DTC and DTM in the database.) I think that storing only DTC when storing draw if the DTC>50 is better. >At present it seems to be more interesting to ignore this and get into 6 piece >files (my ftp site now has 32 gigs of databases for public consumption)... but >before long, the interest will switch to solving the mates for real, once we >start getting table mates in 300+. At present the number of mates that violate >the 50 move rules are very infrequent. In the 6 piece files they will become >more common. In the 7 piece files more so... > >So one day, this problem will totally disappear as the databases will let us >go for the shortest mate that lets us do a 'conversion' prior to the 50-move >rule. I can see how DTC will solve the case of a mate in 80, as you only >need one conversion to mate... but for mates in 200, I am not yet sure how to >solve this, as you might have two moves at the root, one that says mate in 300, >conversion in 48, the other says mate in 320, conversion in 47. But after >the conversion in 47, you discover that the next conversion is 60 moves away >and you are dead... In this case it is not conversion in 47 because the conversion leads to a draw position. conversion in 47 is only if you can force a winning conversion in 47 moves. <snipped> >This is impossible. Because a computer can't 'touch' a piece.. If the operator >makes the wrong move, no one wants to make the program have to live with that >bad move... the CC events are all about computer vs computer, not computer >vs computer with human mistakes influencing the outcome... Not all of them. In the Israeli league I made the wrong move for Rebel because and the shredder operator did not agree to let me take the move back and the rules said that I have to live with the wrong move. Uri
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