Author: Dieter Buerssner
Date: 15:43:33 12/28/02
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On December 28, 2002 at 15:01:24, Uri Blass wrote: >On December 28, 2002 at 13:13:39, Gerd Isenberg wrote: > >>Thanks for the hint. In some endgame positions i got up to 20% collisions. In >>openings or early middlegame < 1%-4%. So about 5% in avarage. Gerd, do you have one such table or 2? It sounds to me, as you only had one. I think with 2 * 2048 entries one should get less than 4% collisions in middlegames. The 2 tables for each side to move (so one doesn't get wrong hits when the right to move changes, for example after null move or some tempo manoever). The 1-4% in early middle games sounds a bit high. The probability for a collision is about move_number/Number_of_entries. So for 4%, one would need to be at move 80 already. Of course, when there are many repetitions in the tree, one gets more matches. But this is the whole idea behind it after all. Perhaps you counted this as collision? I would count it as a hit ... Cheers, Dieter
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