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Backgammon in the Wind - Erratum

Posted By: Chris Bray
Date: Monday, 19 September 2016, at 8:52 a.m.

In preparing my latest book for publication I relied on an old rollout for the Cooke-Sammis back game position which appears on page 190 on the book. That was an error on my part as technology has moved on. The updated explanation can be found on my website www.chrisbraybackgammon.com under the "Position of the Day' tab.

I have updated the text of the book for future purchasers.

Latest 10,000 game rollout is posted below.

		White is Player 2 score: 0 pip: 151 17 point match pip: 55 score: 0 Blue is Player 1
XGID=-bbDDCB----------aacbbb---:0:0:1:00:0:0:0:17:10
Blue on roll, cube action?

Analyzed in Rollout	No double	Double/Take
Player Winning Chances:	55.83% (G:33.41% B:9.31%)	54.89% (G:32.48% B:9.61%)
Opponent Winning Chances:	44.17% (G:0.00% B:0.00%)	45.11% (G:0.00% B:0.00%)
Cubeless Equities	+0.555	+1.077
Cubeful Equities
No double:	+0.661	±0.006 (+0.655..+0.667)
Double/Take:	+0.625 (-0.036)	±0.009 (+0.616..+0.634)
Double/Pass:	+1.000 (+0.339)
Best Cube action: No double / Take
Percentage of wrong pass needed to make the double decision right: 8.8%
Rollout details
10368 Games rolled with Variance Reduction. Dice Seed: 12801914 Moves: 3-ply, cube decisions: XG Roller
Double Decision confidence:		100.0%
Take Decision confidence:		100.0%
Duration: 1 hour 46 minutes

eXtreme Gammon Version: 2.10, MET: Kazaross XG2

Messages In This Thread

• Backgammon in the Wind - Erratum
  Chris Bray -- Monday, 19 September 2016, at 8:52 a.m.
  • Backgammon in the Wind - Erratum
    Casper Van der Tak -- Monday, 19 September 2016, at 11:12 a.m.
    • Backgammon in the Wind - Erratum
      Chris Bray -- Monday, 19 September 2016, at 5:37 p.m.
      • Equity of that situation
        Bob Koca -- Monday, 19 September 2016, at 6:17 p.m.
      • Backgammon in the Wind - Erratum
        Casper Van der Tak -- Monday, 19 September 2016, at 6:46 p.m.
      • Backgammon in the Wind - Erratum
        Florin Popa -- Monday, 19 September 2016, at 10:56 p.m.
        • Backgammon in the Wind - Erratum
          Casper Van der Tak -- Tuesday, 20 September 2016, at 7:42 a.m.
          • Size of the errors
            Florin Popa -- Tuesday, 20 September 2016, at 9:56 a.m.
            • Size of the errors
              Casper Van der Tak -- Tuesday, 20 September 2016, at 10:08 a.m.
            • Size of the errors
              Joe Russell -- Tuesday, 20 September 2016, at 10:42 a.m.
              • Size of the errors
                Florin Popa -- Tuesday, 20 September 2016, at 12:30 p.m.
              • Effective error rate
                Bob Koca -- Tuesday, 20 September 2016, at 1:18 p.m.
              • Effective errors and marginal doubles
                Florin Popa -- Friday, 23 September 2016, at 2:08 p.m.
                • Effective errors and marginal doubles
                  Bob Koca -- Friday, 23 September 2016, at 5:29 p.m.
                  • Effective errors and marginal doubles
                    Florin Popa -- Sunday, 25 September 2016, at 1:41 a.m.
  • Backgammon in the Wind - Erratum
    neilkaz -- Monday, 19 September 2016, at 6:49 p.m.
    • Rollout - 4 ply huge
      KenB -- Thursday, 22 September 2016, at 4:00 a.m.