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Definition of T (sTack, Tower)

Posted By: Nack Ballard
Date: Thursday, 1 December 2011, at 5:21 p.m.

In Response To: Nactation questions (Taper_Mike)

As Mike pointed out (in the bottom of that post), the original Nactation tutorial states:

T (sTack or Tower) is distinguished from [L (Lift)] because it only adds to a point already containing three or more checkers prior to the play. L can add to a point that starts with two (or more) checkers."

In line with what Stick stated, the updated tutorial (not yet published) states:

T (sTack or Tower) only adds to a point that, when the play is completed, will contain four or more checkers. L can add to a point that ends up with three (or more) checkers.

This update (made last year during the revamp) does not change the application of L. However, it does subtly change the application of T. The reason for the change is that in stumbling across a few positions I realized that T's purview had been unnecessarily limited. Below is an example.

64P-52S-44B-42@-66

In this position, the 8pt starts with two checkers. Under the old definition of T, you would use "b" for 20/8(2). Under the new definition of T, you can also use b for 20/8(2), but I recommend T because it is a capital letter and it is more stylish.

To clarify, 13/8 cannot be T in 42P-51S-32 (the position under discussion earlier in this thread, diagrammed below for reference) -- it does not matter whether the old or new definition of T is applied. Indeed, in the overwhelming majority of applicable positions, old or new makes no difference.

42P-51S-32

Nack

Messages In This Thread

• 42P-51S-32
  Timothy Chow -- Friday, 25 November 2011, at 8:21 p.m.
  • 42P-51S-32
    Casper van der Tak -- Friday, 25 November 2011, at 8:34 p.m.
  • 42P-51S-32
    Stick -- Friday, 25 November 2011, at 9:14 p.m.
    • 42P-51S-32
      David Rockwell -- Friday, 25 November 2011, at 11:48 p.m.
      • Nactation questions
        Timothy Chow -- Saturday, 26 November 2011, at 12:07 a.m.
        • Nactation questions
          Stick -- Saturday, 26 November 2011, at 12:09 a.m.
        • Nactation questions
          Dmitriy Obukhov -- Saturday, 26 November 2011, at 2:07 a.m.
          • Nactation questions
            Taper_Mike -- Saturday, 26 November 2011, at 7:55 a.m.
            • Nactation questions — Correction
              Taper_Mike -- Saturday, 26 November 2011, at 8:07 a.m.
              • Higher-number-first corollary
                Nack Ballard -- Monday, 28 November 2011, at 9:12 p.m.
            • Nactation questions
              Timothy Chow -- Saturday, 26 November 2011, at 8:32 p.m.
              • Nactation questions
                Matt Ryder -- Sunday, 27 November 2011, at 6:52 a.m.
                • Nactation questions
                  Timothy Chow -- Sunday, 27 November 2011, at 6:44 p.m.
                  • Nactation questions
                    Matt Ryder -- Tuesday, 29 November 2011, at 4:40 a.m.
                • Nactation questions
                  Nack Ballard -- Monday, 28 November 2011, at 5:43 p.m.
                  • Nactation questions
                    Matt Ryder -- Tuesday, 29 November 2011, at 5:03 a.m.
              • Nactation: S/Z rehash, etc.
                Nack Ballard -- Monday, 28 November 2011, at 5:00 p.m.
                • Nactation: S/Z rehash, etc.
                  Timothy Chow -- Wednesday, 30 November 2011, at 7:05 p.m.
                  • Nactation and Zare's position
                    Nack Ballard -- Friday, 2 December 2011, at 12:43 a.m.
                    • Nactation and Zare's position
                      Timothy Chow -- Friday, 30 May 2014, at 3:37 p.m.
                      • Nactation and Zare's position
                        Nack Ballard -- Friday, 30 May 2014, at 8:53 p.m.
                  • Nactation: S/Z rehash, etc.
                    Matt Ryder -- Friday, 2 December 2011, at 7:19 a.m.
            • Nactation questions
              Nack Ballard -- Thursday, 1 December 2011, at 4:36 p.m.
            • Definition of T (sTack, Tower)
              Nack Ballard -- Thursday, 1 December 2011, at 5:21 p.m.
    • 42P-51S-32
      Taper_Mike -- Saturday, 26 November 2011, at 8:42 a.m.
      • 42P-51S-32
        Casper van der Tak -- Saturday, 26 November 2011, at 9:13 a.m.
  • 42P-51S-32
    Dmitriy Obukhov -- Friday, 25 November 2011, at 10:57 p.m.
    • 42P-51S-32
      Timothy Chow -- Friday, 25 November 2011, at 11:17 p.m.
  • 42P-51S-32
    neilkaz -- Sunday, 27 November 2011, at 7:04 p.m.
  • 42P-51S-32 GNU Rollout
    Stick -- Sunday, 27 November 2011, at 10:36 p.m.
  • 42P-51S-32 XG2 RO
    Dmitriy Obukhov -- Sunday, 27 November 2011, at 11:23 p.m.
    • 42P-51S-32 XG2 RO
      Timothy Chow -- Monday, 28 November 2011, at 3:21 p.m.
    • 42P-51S-32 and 31P-51S-32
      Nack Ballard -- Thursday, 1 December 2011, at 8:16 p.m.