Author: Robert Hyatt
Date: 21:00:21 02/06/02
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On February 06, 2002 at 23:50:48, Edward Seid wrote: >Question regarding the announcement of Mate in X when using tablebases. > >How is X determined? My guess is that it is the summation of the number of >moves to conversion to the next lower tablebase. > >If true, then I have a scenario. > >Assume a 4-piece ending. Using tablebases, White announces Mate in 20. Using >the above definition of Mate in X, White sees Mate in 20 because the nearest >conversion to a 3-piece tablebase is 10 moves, from which there is forced mate >in 10. > >Now let's assume that White chooses NOT to play for the nearest conversion, but >instead plays for a 12-move conversion to a 3-piece ending in which mate is >forced in 6. In the second case, even though White chooses a longer path to >conversion, it actully results in a shorter Mate in 18. > >Is this possible? Not in the current tables. There are no "distance to conversion" considerations at all. _all_ mate scores are absolute shortest mate from the current position scores...
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