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Posted By: Chuck Bower
Date: Tuesday, 17 February 2009, at 5:07 p.m.

In Response To: More lessons here than meet the eye (Matt Cohn-Geier)

Disclaimer: without the issues in front of me I may have some details wrong, but here goes.

This position came up in a Masters match at Minnesota between Ray Fogerlund (Blue) and David Rockwell (White). Ray wrote about it in a Flint Area Backgammon News (FABN) issue saying it was a practical double (many would pass as White) and a small technical error to ship (0.03 to 0.04, I think) when rolled out 324 times on SW. He also rolled it out on GNU-bg 2-ply which said it was an error although I don't recall if Ray stated the magnitude.

A later FABN (Holiday) issue had a letter-to-editor from Paul Stebbing saying he rolled it out with SW and the result was 'blunder'. Then Ray responded in the most recent FABN issue, talking about different bot settings, etc.

As you'll see shortly, the first lesson is that this is a big take. The second lesson (IMO) is that even in newsletters we all gain by seeing the parameters (settings) of the rollouts, plus statistical significance of the result. The third lesson follows along with a rollout.

Messages In This Thread

• More lessons here than meet the eye
  Chuck Bower -- Sunday, 15 February 2009, at 4:15 p.m.
  • More lessons here than meet the eye
    pontiac -- Sunday, 15 February 2009, at 5:06 p.m.
    • More lessons here than meet the eye
      neilkaz -- Sunday, 15 February 2009, at 5:06 p.m.
      • More lessons here than meet the eye
        pontiac -- Sunday, 15 February 2009, at 6:02 p.m.
    • More lessons here than meet the eye
      Dan Pelton -- Sunday, 15 February 2009, at 6:01 p.m.
  • More lessons here than meet the eye
    Martin -- Sunday, 15 February 2009, at 5:17 p.m.
  • More lessons here than meet the eye
    David Rockwell -- Sunday, 15 February 2009, at 6:05 p.m.
    • More lessons here than meet the eye
      neilkaz -- Sunday, 15 February 2009, at 6:29 p.m.
    • More lessons here than meet the eye
      DanielP -- Monday, 16 February 2009, at 11:32 a.m.
  • More lessons here than meet the eye
    Jason Lee -- Sunday, 15 February 2009, at 10:30 p.m.
  • More lessons here than meet the eye
    David Rockwell -- Sunday, 15 February 2009, at 11:04 p.m.
  • More lessons here than meet the eye
    garyo -- Monday, 16 February 2009, at 3:39 a.m.
  • More lessons here than meet the eye
    Rich Munitz -- Monday, 16 February 2009, at 6:46 p.m.
  • More lessons here than meet the eye
    Matt Cohn-Geier -- Monday, 16 February 2009, at 7:55 p.m.
    • History
      Chuck Bower -- Tuesday, 17 February 2009, at 5:07 p.m.
      • History
        Stick -- Tuesday, 17 February 2009, at 5:16 p.m.
        • History
          neilkaz -- Tuesday, 17 February 2009, at 5:38 p.m.
          • History
            Stick -- Tuesday, 17 February 2009, at 6:07 p.m.
          • History
            Matt Cohn-Geier -- Tuesday, 17 February 2009, at 6:23 p.m.
            • History
              MFIC -- Thursday, 19 February 2009, at 1:51 a.m.
              • History
                Matt Cohn-Geier -- Thursday, 19 February 2009, at 2:42 a.m.
              • History
                Stick -- Thursday, 19 February 2009, at 4:38 a.m.
                • History
                  Rich Munitz -- Thursday, 19 February 2009, at 5:15 a.m.
            • History
              neilkaz -- Thursday, 19 February 2009, at 4:47 a.m.
              • History
                Matt Cohn-Geier -- Thursday, 19 February 2009, at 5:08 a.m.
        • History
          Chuck Bower -- Tuesday, 17 February 2009, at 5:44 p.m.
          • History
            Stick -- Tuesday, 17 February 2009, at 6:06 p.m.
      • Hidden lesson
        Chuck Bower -- Tuesday, 17 February 2009, at 5:34 p.m.
        • two (3-ply cube) RO results
          Chuck Bower -- Tuesday, 17 February 2009, at 5:41 p.m.
          • After 64 then dance
            neilkaz -- Tuesday, 17 February 2009, at 8:29 p.m.
        • Hidden lesson
          David Rockwell -- Tuesday, 17 February 2009, at 6:55 p.m.