Author: Ricardo Gibert
Date: 17:06:07 08/02/99
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On August 02, 1999 at 18:15:27, Jeff Anderson wrote: >Could someone with access to the KQ v kr endgame tablebase tell me how many >moves before Black mates in this position? I believe the tablebases are not optimized for finding the shortest mate. For instance, in this case, it finds the shortest route to mate OR win the rook. After winning the rook, it then finds the shortest mate from there. So it is possible the "best" play generated by the table base is not the shortest mate. It is also possible for a tablebase, organized differently, can give a solution of a different length than another tablebase, though I would not expect that here. So "perfection" is not guaranteed, but it does have the virtue of being optimal in the light of the 50 move rule. In other words, it is possible that a position is winnable without exceeding the 50 move rule, but the "shortest mate" would exceed the 50 move rule. Of course, in that case it would not really be the "shortest mate." I would be interested in seeing an example position of this if someone has it. > >8/8/8/8/6k1/8/q4RK1/8 b - - 0 1 > >Thanks in advance. > >Jeff
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