BGonline.org Forums

Formlas for Doubling, Redoubling and Folding.

Posted By: Chuck Bower
Date: Wednesday, 23 May 2007, at 2:46 p.m.

In Response To: Formlas for Doubling, Redoubling and Folding. (Curtis Simmons)

I see a couple issues to consider:

1) How accurate are the Keeler-Spencer-Zadeh-Kobliska model results? (BTW, I think you have a typo in the reference -- 1997 should be 1977.)

2) Is your OtB algorithm worth the effort?

The second is a judgement call for each individual. Regarding the first question, when the bearoff gets down to a few checkers the continuous model (as used by these authors) breaks down. Typically below a pipcount of 30 or so you need to use a different method of determining the equity.

As you know, 30 years ago there were no reliable computers or bearoff databases. It might be an interesting exercise to put positions into GNU-bg (for the higher pipcounts) and see how well your algorithm (and their results) hold up.

Messages In This Thread

• Formlas for Doubling, Redoubling and Folding.
  Curtis Simmons -- Wednesday, 23 May 2007, at 8:06 a.m.
  • Formlas for Doubling, Redoubling and Folding.
    mamabear -- Wednesday, 23 May 2007, at 10:38 a.m.
    • Formlas for Doubling, Redoubling and Folding.
      Mislav Radica -- Wednesday, 23 May 2007, at 2:15 p.m.
    • Formlas for Doubling, Redoubling and Folding.
      Chuck Bower -- Wednesday, 23 May 2007, at 2:51 p.m.
  • Formlas for Doubling, Redoubling and Folding.
    Chuck Bower -- Wednesday, 23 May 2007, at 2:46 p.m.
  • Formlas for Doubling, Redoubling and Folding.
    Marty Storer -- Friday, 25 May 2007, at 3:26 p.m.