Author: Drexel,Michael
Date: 04:56:05 01/15/04
Go up one level in this thread
On January 15, 2004 at 07:41:22, Mike Hood wrote: >On January 15, 2004 at 04:17:34, Drexel,Michael wrote: > >>On January 14, 2004 at 18:57:50, Mike Hood wrote: >> >>>On January 14, 2004 at 16:08:24, David H. McClain wrote: >>> >>>>On January 14, 2004 at 15:07:39, Chris Taylor wrote: >>>> >>>>>Does S8 know how to use the 6 piece egtbs'? I could wait for it to arrive, nah; >>>>>please tell me! I have ordered the dam things and would like to know if I have >>>>>wasted my GBPs. >>>>> >>>>> >>>>>Chris >>>> >>>>Chris, >>>> >>>>Being an amatuer here perhaps I am making an incorrect assumption about this. >>>> >>>>When I use my Shredder 7.04 the heavy hard drive activity appears to indicate it >>>>is accessing EGTBs tablebases when there are six pieces left on the board. I >>>>have assumed all along that this indicates that Shredder 7.04 is using a few of >>>>my 6 piece EGTBs or is at least looking for them. Shredder Classic GUI also >>>>states "6 piece EGTBs found" when changing hash table size for them. >>>> >>>>Hopefully one of our experts on this can either confirm or refute this. If this >>>>is in fact true then I see no reason why S 8 would not do the same. >>>> >>>>DHM >>> >>>The disk activity (and the "tb=" info in the engine window) when 6 pieces are on >>>the board doesn't necessarily mean that Shredder 7 is accessing a 6-piece >>>tablebase. It might only be accessing 5-piece tablebases in a search line which >>>results in the capture of one of the pieces. >>> >>>As far as I know, Shredder 7 accesses the single part 6-piece tablebases, ie the >>>tablebases that don't have a digit in the filename. The only programs that I >>>know that access the multi-part 6-piece tablebases are Hiarcs 9 and Crafty. I >>>assume that Shredder 8 can be added to this list. Ask me again next week. >> >>You can add Fritz 7 and Fritz 8 to that list. >> >>Michael > >Sorry, Michael, you're wrong. No, I am right. Both Fritz 7 and Fritz 8 use them in the search. New game 3kr3/8/8/8/8/3p4/2PP4/2RK4 w - - 0 1 Analysis by Fritz 7: 1. = (0.00): 1.Ta1 dxc2+ 2.Kxc2 Te2 3.Ta7 Te1 2. = (0.00): 1.Tb1 dxc2+ 2.Kxc2 Te2 3. = (0.00): 1.cxd3 Te5 2.d4 Td5 4. -+ (-#28): 1.c3 Th8 2.Ke1 5. -+ (-#21): 1.c4 Tg8 2.Ke1 New game 3kr3/8/8/8/8/3p4/2PP4/2RK4 w - - 0 1 Analysis by Fritz 8: 1. = (0.00): 1.cxd3 Kd7 2. = (0.00): 1.Ta1 dxc2+ 2.Kxc2 3. = (0.00): 1.Tb1 dxc2+ 2.Kxc2 4. -+ (-#27): 1.c3 Tg8 2.Ke1 Tg1+ 3.Kf2 Txc1 4.Ke3 Te1+ 5.Kd4 Te2 6.Kxd3 5. -+ (-#21): 1.c4 Th8 2.Ke1 Th1+ 3.Kf2 Txc1 4.Ke3 Txc4 5.Kxd3 Tc1 6.Kd4 This is what you get if an engine does not use them: New game 3kr3/8/8/8/8/3p4/2PP4/2RK4 w - - 0 1 Analysis by Fritz 6: 1. ± (1.38): 1.cxd3 Kd7 2.Tc5 Kd6 3.Ta5 Kc6 4.d4 Te4 5.d5+ Kb6 2. = (0.00): 1.Tb1 dxc2+ 2.Kxc2 3. = (0.00): 1.Ta1 dxc2+ 2.Kxc2 4. -+ (-#27): 1.c3 Th8 2.Ke1 Th1+ 3.Kf2 Txc1 4.Ke3 Te1+ 5.Kd4 Te2 5. -+ (-#21): 1.c4 Th8 2.Ke1 Th1+ 3.Kf2 Txc1 4.Ke3 Txc4 Michael
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