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Problem: bitbase access by Scorpio versions... Dan Shawul?
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Ernest Bonnem



Joined: 08 Mar 2006
Posts: 1271
PostPost subject: Re: Problem: bitbase access by Scorpio versions... Dan Shawu    Posted: Tue May 29, 2012 10:31 pm Reply to topic Reply with quote
Daniel Shawul wrote:
Ernest, it is working fine I think. It is because of some complicated code I put to cull root moves that lead to inferior score when being in egbb. So for <= 5 man positions, the root is already inside egbb and any move that leads to a score less than or equal to the root score by a good margin is culled out.

Thanks Daniel!

Indeed, from the 5-man position where I reported the difficulty with Scorpio 2.7
(only winning move Kc2)
[d]8/8/8/8/5kp1/P7/8/1K1N4 w - - 0 1 ; bm Kb1-c2; dm50
   ::    ::    ::    ::
::    ::    ::    ::    
   ::    ::    ::    ::
::    ::    ::    ::    
   ::    ::    BK BP ::
WP    ::    ::    ::    
   ::    ::    ::    ::
:: WK :: WN ::    ::    


I derived the following 7-man position
[d]8/8/8/7p/5kq1/P6Q/8/1K1N4 w - - 0 1
   ::    ::    ::    ::
::    ::    ::    ::    
   ::    ::    ::    ::
::    ::    ::    :: BP
   ::    ::    BK BQ ::
WP    ::    ::    :: WQ
   ::    ::    ::    ::
:: WK :: WN ::    ::    

and Scorpio 2.7 gave the correct infinite analysis, triggered by the bitbases:
8/8/8/7p/5kq1/P6Q/8/1K1N4 w - - 0 1
Analysis by Scorpio 2.7:
1.Qxg4+ hxg4
+- (49.16) Depth: 6 00:00:00 5kN
1.Qxg4+ hxg4
+- (49.16) Depth: 6 00:00:00 6kN
1.Qxg4+ hxg4
+- (49.16) Depth: 7 00:00:00 6kN
1.Qxg4+ hxg4
+- (49.16) Depth: 7 00:00:00 7kN
1.Qxg4+ hxg4
+- (49.16) Depth: 8 00:00:00 7kN
1.Qxg4+ hxg4
+- (49.16) Depth: 8 00:00:00 9kN


Last, Dan, you did not answer to my second question:

Also note that when in scorpio.ini I put
#egbb_load_type 3
(meaning loading all 5 men in memory), my Task Manager does not show 200 MB more used in memory, and access is still from disk...
concerning
#load egbbs at start up
# 0 = none
# 1 = all 3/4 men
# 2 = selective loading of 5 men (not implemented yet)
# 3 = all 5 men

It seems only # 0 Cool and # 1 work, loading # 2 and # 3 (5-men into memory) do not work
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Subject Author Date/Time
Problem: bitbase access by Scorpio versions... Dan Shawul? Ernest Bonnem Mon May 28, 2012 5:05 pm
      Re: Problem: bitbase access by Scorpio versions... Dan Shawu Daniel Shawul Mon May 28, 2012 5:31 pm
            Re: Problem: bitbase access by Scorpio versions... Dan Shawu Ronald de Man Mon May 28, 2012 5:41 pm
                  Re: Problem: bitbase access by Scorpio versions... Dan Shawu Daniel Shawul Mon May 28, 2012 5:45 pm
                        Re: Problem: bitbase access by Scorpio versions... Dan Shawu Daniel Shawul Mon May 28, 2012 6:18 pm
                              Re: Problem: bitbase access by Scorpio versions... Dan Shawu Ernest Bonnem Tue May 29, 2012 10:31 pm
                                    Re: Problem: bitbase access by Scorpio versions... Dan Shawu Daniel Shawul Wed May 30, 2012 3:01 am
                                          Re: Problem: bitbase access by Scorpio versions... Dan Shawu Ernest Bonnem Wed May 30, 2012 8:04 pm
                                                Re: Problem: bitbase access by Scorpio versions... Dan Shawu Daniel Shawul Wed May 30, 2012 9:22 pm
                                                      Re: Problem: bitbase access by Scorpio versions... Dan Shawu Ernest Bonnem Thu May 31, 2012 5:01 pm
                                                            Re: Problem: bitbase access by Scorpio versions... Dan Shawu Daniel Shawul Thu May 31, 2012 5:56 pm
                                                                  Re: Problem: bitbase access by Scorpio versions... Dan Shawu Ernest Bonnem Thu May 31, 2012 6:16 pm
                                                                        Re: Problem: bitbase access by Scorpio versions... Dan Shawu Daniel Shawul Thu May 31, 2012 6:31 pm
                                                                              Re: Problem: bitbase access by Scorpio versions... Dan Shawu Ernest Bonnem Sat Jun 02, 2012 6:13 pm
                                    Re: Problem: bitbase access by Scorpio versions... Dan Shawu Guenther Simon Wed May 30, 2012 4:14 pm
                                          Re: Problem: bitbase access by Scorpio versions... Dan Shawu Ernest Bonnem Wed May 30, 2012 7:44 pm
      Re: Problem: bitbase access by Scorpio versions... Dan Shawu Ronald de Man Mon May 28, 2012 5:35 pm
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