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Rollout: Bearing in with no contact

Posted By: Chuck Bower
Date: Wednesday, 18 August 2010, at 5:14 p.m.

In Response To: Rollout: Bearing in with no contact (Timothy Chow)

A nice thing about non-contact positions is that in principle we could actually compute the mathematically correct answer, without having to trust that the bot is playing correctly. Has anybody... done so?

Many people have done this (well, many = about a dozen?) but the champion of the technique is Hugh Sconyers who started working on this a couple decades (maybe more) ago and over the years built a database which is close to 50 GB in size. I don't think his DB includes situations where checkers are outside the homeboard (could be wrong on that). Here's the link:

http://www.back-gammon.info/sconyers/index.html

Also, you used to be able to link the DB into GNU-bg, and maybe the current GNU-bg versions still allow that.

Messages In This Thread

• Bearing in with no contact
  Timothy Chow -- Monday, 16 August 2010, at 11:27 p.m.
  • Bearing in with no contact
    Stick -- Monday, 16 August 2010, at 11:33 p.m.
    • Bearing in with no contact
      Alexandre Le Siege -- Tuesday, 17 August 2010, at 1:36 p.m.
  • Bearing in with no contact
    Matt Cohn-Geier -- Tuesday, 17 August 2010, at 12:02 a.m.
    • Bearing in with no contact
      Timothy Chow -- Tuesday, 17 August 2010, at 12:30 a.m.
      • Bearing in with no contact
        Matt Cohn-Geier -- Tuesday, 17 August 2010, at 12:36 a.m.
      • Bearing in with no contact
        Stick -- Tuesday, 17 August 2010, at 12:58 a.m.
        • MCG Cannot Bear In, But Can He Bear Off?
          Paul Weaver -- Tuesday, 17 August 2010, at 1:17 a.m.
          • MCG Cannot Bear In, But Can He Bear Off?
            Stick -- Tuesday, 17 August 2010, at 1:27 a.m.
            • Confucious Weighs In Regarding Bearing In and Bearing Off
              Paul Weaver -- Tuesday, 17 August 2010, at 2:00 a.m.
              • Confucious Weighs In Regarding Bearing In and Bearing Off
                Stick -- Tuesday, 17 August 2010, at 2:43 a.m.
  • Can Fernando Braconi Bear In?
    Paul Weaver -- Tuesday, 17 August 2010, at 1:55 a.m.
    • Swing Numbers are 44, 43, 33
      Paul Weaver -- Tuesday, 17 August 2010, at 3:12 a.m.
    • Can Fernando Braconi Bear In?
      Jason Lee -- Tuesday, 17 August 2010, at 4:28 a.m.
    • Can Fernando Braconi Bear In?
      mochy -- Tuesday, 17 August 2010, at 10:45 a.m.
      • Can Fernando Braconi Bear In?
        neilkaz -- Tuesday, 17 August 2010, at 2:34 p.m.
        • Can Fernando Braconi Bear In?
          Matt Cohn-Geier -- Tuesday, 17 August 2010, at 3:24 p.m.
    • Can Fernando Braconi Bear In?
      neilkaz -- Tuesday, 17 August 2010, at 2:33 p.m.
      • Can Fernando Braconi Bear In?
        johnk -- Tuesday, 17 August 2010, at 6:49 p.m.
  • Rollout: Bearing in with no contact
    Timothy Chow -- Tuesday, 17 August 2010, at 10:28 p.m.
    • Rollout: Bearing in with no contact
      Stick -- Wednesday, 18 August 2010, at 12:23 a.m.
      • Rollout: Bearing in with no contact
        Timothy Chow -- Wednesday, 18 August 2010, at 12:32 a.m.
        • Rollout: Bearing in with no contact
          Gregg Cattanach -- Wednesday, 18 August 2010, at 1:39 p.m.
        • Rollout: Bearing in with no contact
          Chuck Bower -- Wednesday, 18 August 2010, at 5:14 p.m.
          • Rollout: Bearing in with no contact
            Gregg Cattanach -- Wednesday, 18 August 2010, at 7:13 p.m.
            • 15 DVD set?
              Chuck Bower -- Thursday, 19 August 2010, at 4:14 p.m.
              • 15 DVD set?
                Gregg Cattanach -- Monday, 23 August 2010, at 3:29 p.m.
          • Rollout: Bearing in with no contact
            Timothy Chow -- Wednesday, 18 August 2010, at 8:09 p.m.
            • Rollout: Bearing in with no contact
              Chuck Bower -- Thursday, 19 August 2010, at 4:19 p.m.
              • Rollout: Bearing in with no contact
                Timothy Chow -- Thursday, 19 August 2010, at 5:13 p.m.
                • Rollout: Bearing in with no contact
                  Chuck Bower -- Friday, 20 August 2010, at 12:28 a.m.
        • Rollout: Bearing in with no contact
          Stick -- Wednesday, 18 August 2010, at 7:58 p.m.
    • Rollout of cube decision after 7/3 6/5
      Timothy Chow -- Friday, 20 August 2010, at 1:59 a.m.
  • DMP rollout: Bearing in with no contact
    Timothy Chow -- Thursday, 19 August 2010, at 3:59 p.m.