Opening Rolls

Forum Archive : Opening Rolls

 
Rollouts: Expert Backgammon

From:   Tom Fahland
Address:   fahland@fnald0.fnal.gov
Date:   3 August 1994
Subject:   ROLLOUTS OF OPENING MOVES FROM EXPERT BG(2.1)
Forum:   rec.games.backgammon
Google:   31odn4$h6o@fnnews.fnal.gov

Well here is an intersting brief summary of a very thourgh rollout
done by expert backgammon. I am just quoting the results that were
performed by Jerry Godesy that were published in the chicago point
newslettter.

# of rollouts was very large-- 27,216 for each move, thus very small
 stastical error

1. 2-1 is only roll were all moves give negative equity
2. best equity for 4-1, 4-3 is moving both back men up, how many do this?
3. slotting with 2-1, 4-1, 5-1 gives worst equity.
4. for rolls 6-2,6-3,6-4, split to 18 point is superior.

here are some results

roll       play                       pts/game
----------------------------------------------
2-1        13/11, 24/23                -.005
           24/21                       -.008
           13/10                       -.029
           24/22, 24/23                -.038
           13/11, 6/6                  -.045
-----------------------------------------------
4-1        24/20 24/23                  .006
           13/9 24/23                  -.017
           13/8                        -.034
           24/20 6/5                   -.043
           13/9 6/5                    -.064
------------------------------------------------
5-1        13/8 24/23                   .001
           24/18                       -.016
           13/8 6/5                    -.064
------------------------------------------------
3-2        24/21 13/11                  .017
           13/10 24/22                  .011
           24/21 24/22                  .001
           13/10 13/11                 -.009
           13/8                        -.034
           8/5 13/11                   -.062
-------------------------------------------------
5-2        13/8 24/22                   .004
           13/8 13/11                   .004
           13/8 6/4                    -.036
------------------------------------------------
4-3        24/20 24/21                  .028
           24/20 13/10                  .014
           13/9 24/21                   .008
           13/9 13/10                  -.013
--------------------------------------------------
5-4        13/8 24/20                   .041
           24/15                        .014
           13/8 13/9                    .009
           13/4                        -.033
--------------------------------------------------
thats it for moves that aren't obvious

Tom (chameleon)
 
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Opening Rolls

At different match scores  (Louis Nardy Pillards, July 2002) 
Average advantage of winning opening roll  (Chuck Bower, Oct 1998) 
Choosing a strategy  (Daniel Murphy, June 2001) 
Early game rule of thumb  (Rich Munitz, Feb 2009) 
Factors to consider  (Kit Woolsey, July 1994) 
How computers play  (Kit Woolsey, Mar 1995)  [Recommended reading]
Magriel's Chapter 5  (Hayden Alfano+, May 2006)  [Long message]
Mloner vs Jellyfish  (Kit Woolsey, Dec 1995) 
Nactating a whole game  (Nack Ballard+, Jan 2011)  [Long message]
Nactation  (Jim Stutz+, June 2010) 
Nactation overview  (Nack Ballard, Oct 2009) 
Nactation--Why use it?  (leobueno+, Jan 2011) 
Opening 1's: Split or slot?  (Douglas Zare, Dec 2003) 
Opening 21: Rollout  (Stick, Mar 2006)  [GammOnLine forum]
Opening 21: Split or slot?  (Dick Adams+, Dec 2003) 
Opening 32: Rollout  (Stick, Feb 2006)  [GammOnLine forum]
Opening 43: In GOL online match  (Raccoon+, Feb 2004)  [GammOnLine forum]
Opening 43: Pros and cons  (Stick+, Jan 2006)  [GammOnLine forum]
Opening 43: Which split is better?  (Peter Backgren+, Aug 2000) 
Opening 43: Which split is better?  (Michael J. Zehr+, Mar 1996) 
Opening 51: Rollout  (Stick, Feb 2006)  [GammOnLine forum]
Opening 52: Merits of splitting  (Peter Bell, Apr 1995) 
Opening 53: Magriel's recommendation  (George Parker+, July 1997)  [Long message]
Opening 53: Split to 21?  (Alex Zamanian, Aug 2000) 
Opening 53: Why make the three point?  (Kit Woolsey+, Feb 1996) 
Opening 6's: Slot the bar point?  (Chuck Bower+, Feb 2000) 
Opening 6's: Slot the bar point?  (David Montgomery, June 1995) 
Opening 62: Could running be best?  (Gary Wong, Sept 1997) 
Opening 62: Split, run, or slot?  (Chuck Bower, May 1997) 
Opening 63: Middle Eastern split?  (Mark+, Apr 2002) 
Opening 63: Slot the four point?  (Dennis Cartwright+, Mar 2002) 
Opening 64: Make the two point?  (William Hill+, Jan 1998) 
Opening 64: Make the two point?  (Darse Billings, Feb 1995) 
Opening 64: Rollout  (Peter Grotrian, Jan 2006)  [GammOnLine forum]
Opening 64: Split to 20?  (Peter Bell, June 1995) 
Opening 64: Three choices  (Brian Sheppard, July 1997) 
Opening 65: Becker on lover's leap  (Jeffrey Spiegler+, Aug 1991) 
Opening 65: Computer rankings  (Chuck Bower, Jan 1997) 
Opening rolls ranked  (Arthur+, Apr 2005) 
Rollouts of opening 21 and replies  (Alexander Nitschke, Oct 1997) 
Rollouts of openings  (Tom Keith+, Jan 2006) 
Rollouts: Expert Backgammon  (Tom Fahland, Aug 1994) 
Rollouts: Jellyfish 3.0  (Midas+, Sept 1997) 
Rollouts: Jellyfish 3.0 level 6  (Chuck Bower, Feb 1999)  [Recommended reading]
Rollouts: Snowie 4.1  (Rene Cerutti, Apr 2004) 
Slotting the four point  (Joe Loria+, Oct 1999) 
Snowie's openers and replies  (rcerutti, Feb 1999)  [Long message]
Splitting versus building  (Dave Slayton+, Aug 2000) 
Splitting versus slotting  (Daniel Murphy, Apr 2001) 
Splitting versus slotting  (Daniel Murphy, Sept 1997) 
Trice's rankings  (Marty Storer, Feb 1992) 

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