BGonline.org Forums

Same seed + different position = different dice rolls

Posted By: Taper_Mike
Date: Friday, 2 March 2012, at 5:04 a.m.

In Response To: 41S-54 XG RO rather TCTC (David Rockwell)

[This update is for those who may be rooting around amid the old posts here at BGO.] David: I have started using the same seed as a matter of course for rolls with the same pip count. As this thread from May 2010 explains, it is not possible using XG’s internal random number generator to duplicate the sequence of dice rolls used in two different positions. This is because the seed used for generating dice rolls is a combination of the user-supplied seed and a hash of the checker positions. Nack: Actually, cross-pollination of rollout results is the one situation in which I DO advocate using the same seed... such as 41S-54R + 41S-63R, or 63S-11N + 43S-11N Nack’s notion of cross-pollination will work in XG. Because the resulting checker positions are identical in sequences such as the ones Nack gives, the board hashes will also be the same. Thus using the same user-supplied seed in each position will generate the same sequence of dice rolls. Nack himself notes this in a message from the thread cited above. Mike

Messages In This Thread

• 41S-63 XG RO TCTC
  neilkaz -- Tuesday, 18 May 2010, at 3:47 p.m.
  • 41S-63 data
    Nack Ballard -- Tuesday, 18 May 2010, at 5:48 p.m.
    • 41S-63-D
      Stick -- Tuesday, 18 May 2010, at 7:07 p.m.
  • 41S-54 XG RO rather TCTC
    neilkaz -- Tuesday, 18 May 2010, at 8:06 p.m.
    • 41S-54 XG RO rather TCTC
      Stick -- Tuesday, 18 May 2010, at 8:27 p.m.
      • 41S-54 XG RO rather TCTC
        neilkaz -- Tuesday, 18 May 2010, at 8:53 p.m.
        • 41S-54 XG RO rather TCTC
          Stick -- Tuesday, 18 May 2010, at 9:05 p.m.
        • 41S-54 XG RO rather TCTC
          Nack Ballard -- Tuesday, 18 May 2010, at 11:46 p.m.
          • 41S-54 XG RO rather TCTC
            David Rockwell -- Wednesday, 19 May 2010, at 6:46 p.m.
            • Same seed + different position = different dice rolls
              Taper_Mike -- Friday, 2 March 2012, at 5:04 a.m.
              • Same seed + different position = different dice rolls
                eXtreme Gammon -- Friday, 2 March 2012, at 1:32 p.m.
        • 41S-54 XG RO rather TCTC
          eXtreme Gammon -- Wednesday, 19 May 2010, at 7:13 p.m.
          • Same seed + different position == different dice rolls
            Taper_Mike -- Friday, 2 March 2012, at 5:23 a.m.
    • 41S-54 data
      Nack Ballard -- Tuesday, 18 May 2010, at 11:31 p.m.