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Using partial set of 6 piece endgame tablebases
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Gordon Robertson



Joined: 06 Aug 2009
Posts: 25
Location: UK

PostPost subject: Using partial set of 6 piece endgame tablebases    Posted: Fri Aug 07, 2009 5:56 pm Reply to topic Reply with quote

I'm currently downloading a partial set of 6 man TBs. I will have at most 0.5 Terabyte of space to use, so can't download the full set.

However, maybe I'm underestimating the need for all derivatives before downloading those containing pawns?! For example:

[D]8/8/P7/B3nk2/8/8/P7/K7 w - - 0 1
   ::    ::    ::    ::
::    ::    ::    ::    
WP ::    ::    ::    ::
WB    ::    BN BK ::    
   ::    ::    ::    ::
::    ::    ::    ::    
WP ::    ::    ::    ::
WK    ::    ::    ::    


Here, I've downloaded BPPvsN but I noticed that this caused issues while analysing with Zappa. So I then downloaded QBPvN but I still see issues (Zappa doesn't play a7 and allows a draw).

Rybka handles this ok. I realise that some engines have minimum search prior to using TBs. This defaults to 4 for Zappa. Why is Zappa avoiding a7? The best line stays within my downloaded TBs.

I also plan to start checksumming my downloads for corrupt files, etc. Not yet done.

thanks
Gordon
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Subject Author Date/Time
Using partial set of 6 piece endgame tablebases Gordon Robertson Fri Aug 07, 2009 5:56 pm
      Re: Using partial set of 6 piece endgame tablebases kgburcham Fri Aug 07, 2009 9:00 pm
            Re: Using partial set of 6 piece endgame tablebases Gordon Robertson Fri Aug 07, 2009 11:29 pm
                  Re: Using partial set of 6 piece endgame tablebases kgburcham Fri Aug 07, 2009 11:39 pm
                        Re: Using partial set of 6 piece endgame tablebases Ernest Bonnem Sat Aug 08, 2009 10:24 am
                        Re: Using partial set of 6 piece endgame tablebases Dadi Jonsson Sat Aug 08, 2009 6:44 pm
                  Re: Using partial set of 6 piece endgame tablebases Guenther Simon Sat Aug 08, 2009 7:59 am
                        Re: Using partial set of 6 piece endgame tablebases Gordon Robertson Sat Aug 08, 2009 1:59 pm
                              Re: Using partial set of 6 piece endgame tablebases Peter Skinner Sat Aug 08, 2009 5:33 pm
                                    Re: Using partial set of 6 piece endgame tablebases Edmund Moshammer Sat Aug 08, 2009 5:45 pm
                                          Re: Using partial set of 6 piece endgame tablebases Gordon Robertson Sat Aug 08, 2009 8:08 pm
            Re: Using partial set of 6 piece endgame tablebases Robert Hyatt Tue Aug 11, 2009 12:24 am
      Re: Using partial set of 6 piece endgame tablebases Mark Mason Sun Aug 09, 2009 7:40 am
            Re: Using partial set of 6 piece endgame tablebases Gordon Robertson Sun Aug 09, 2009 4:26 pm
      Re: Using partial set of 6 piece endgame tablebases Harun Taner Mon Aug 10, 2009 9:20 pm
            Re: Using partial set of 6 piece endgame tablebases Harun Taner Mon Aug 10, 2009 9:22 pm
                  Re: Using partial set of 6 piece endgame tablebases Harun Taner Mon Aug 10, 2009 9:24 pm
                        Re: Using partial set of 6 piece endgame tablebases Harun Taner Mon Aug 10, 2009 9:28 pm
      Re: Using partial set of 6 piece endgame tablebases Robert Hyatt Tue Aug 11, 2009 12:22 am
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