Forum Archive : Cube Handling in Races

N-roll vs n-roll bearoff From:   David Rubin Address:   d-rubin@neiu.edu Date:   25 July 2008 Subject:   6 rolls vs. 6 rolls = double? Forum:   BGonline I was taught that 6 rolls vs. 6 rolls (e.g. each player having 12 checkers on the ace point) is NOT a double. Reasoning: one roll later (5 rolls vs. 5 rolls) it is still a take, so better to wait. Well Snowie doubles 6 rolls vs. 6 rolls. In fact, Snowie double 7 rolls vs. 7 rolls! What am I not understanding? Philippe Michel  writes: > Reasoning: one roll later (5 rolls vs. 5 rolls) it is still a take, so > better to wait. Sometimes, one roll later it is 4 rolls vs. 5 and a big pass ... These late bearoff can be computed exactly with small programs like this one: http://www.bkgm.com/rgb/rgb.cgi?view+787 There is something about these situations at the beginning of the "Racing off the Ace" chapter from Backgammon Boot Camp (http://www.bkgm.com/books/Trice-BackgammonBootCamp.html) as well: 6-vs-6, 7-vs-7, and 8-vs-8 are doubles; 9-vs-9 would not be.   Did you find the information in this article useful?           Do you have any comments you'd like to add?

 

Cube Handling in Races

Bower's modified Thorp count  (Chuck Bower, July 1997) 

Calculating winning chances  (Raccoon, Jan 2007) 

Calculating winning chances  (OpenWheel+, Nov 2005) 

Doubling formulas  (Michael J. Zehr, Jan 1995) 

Doubling in a long race  (Brian Sheppard, Feb 1998) 

EPC example  (adambulldog+, Jan 2011) 

EPC example: stack and straggler  (neilkaz+, Jan 2009) 

EPC examples: stack and straggler  (Carlo Melzi+, Dec 2008) 

Effective pipcount  (Douglas Zare, Sept 2003) 

Effective pipcount and type of position  (Douglas Zare, Jan 2004) 

Kleinman count  (Øystein Johansen+, Feb 2001) 

Kleinman count  (André Nicoulin, Sept 1998) 

Kleinman count  (Chuck Bower, Mar 1998) 

Lamford's race forumla  (Michael Schell, Aug 2001) 

N-roll vs n-roll bearoff  (David Rubin+, July 2008) 

N-roll vs n-roll bearoff  (Gregg Cattanach, Nov 2002) 

N-roll vs n-roll bearoff  (Chuck Bower+, Dec 1997) 

Near end of game  (Daniel Murphy, Mar 1997) 

Near end of game  (David Montgomery, Feb 1997) 

Near end of game  (Ron Karr, Feb 1997) 

One checker model  (Kit Woolsey+, Feb 1998) 

Pip count percentage  (Jeff Mogath+, Feb 2001) 

Pip-count formulas  (Tom Keith+, June 2004) 

Thorp count  (Chuck Bower, Jan 1997) 

Thorp count  (Simon Woodhead, Sept 1991) 

Thorp count questions  (Chuck Bower, Sept 1999) 

Value of a pip  (Tom Keith, June 2004) 

Ward's racing formula  (Marty Storer, Jan 1992) 

What's your favorite formula?  (Timothy Chow+, Aug 2012) 

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