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NG Opening 21

Posted By: Nack Ballard
Date: Monday, 19 April 2010, at 8:28 a.m.

In Response To: NG Opening 21 (Nack Ballard)

	194
Nackgammon, Opening 21	194

How do you play opening 21 in Nackgammon? Below is (money) data, which will be followed by clarifying diagrams:

Snowie .. [@ U14 V26 u39 S58] 10k 6ku 3kS
GnuBG .. [@ U16 V37 u40 S59] 62k 15kVu 5kS
XG 3-ply [@ U9 V34 u44] 62k 31kVu

Bot avg. [@ U13 V32 u41 S59]

Nactation key: @ = anchor (24/22 23/22), U = Up (23/20), V = Variant-Up (23/22 23/21), u = up (24/21), and S = Split (23/22 13/11).

Margins are in thousandths of a point, and the number of trials is listed in thousands ("k") after the brackets. For example, "[@ U14 V26 u39 S58] 10k 6ku 3kS" means that @ is best, U is -.014, V is -.026, after 10000+ trials; u is -.039 after 6000+ trials; and S is -.058 after 3000+ trials.

(At DMP and GG, the U play is even closer: -.003 and -.004 respectively according to Gnu rollouts.)

Below are the positions after the top five candidate plays, with the margin (error size) for each.

Blue played 21@, which is BEST

Blue played 21U, which is -.013

Blue played 21V, which is -.032

Blue played 21u, which is -.041

Blue played 21S, which is -.059

Next, look for my NG Opening 53 post.

Nack

Messages In This Thread

• Nackgammon Opening Rolls
  Phil Simborg -- Monday, 5 April 2010, at 9:36 p.m.
  • Nackgammon Opening Rolls
    Stick -- Monday, 5 April 2010, at 9:46 p.m.
    • Nackgammon Opening Rolls
      Phil Simborg -- Monday, 5 April 2010, at 9:50 p.m.
      • Nackgammon Opening Rolls
        Stick -- Tuesday, 6 April 2010, at 2:10 a.m.
  • Nackgammon Opening Rolls
    Timothy Chow -- Monday, 5 April 2010, at 10:19 p.m.
  • Nackgammon Opening Rolls
    Steve Mellen -- Monday, 5 April 2010, at 10:27 p.m.
  • Nackgammon Opening Rolls
    Nack Ballard -- Tuesday, 6 April 2010, at 3:27 a.m.
    • Nackgammon Opening Rolls
      Bob Koca -- Tuesday, 6 April 2010, at 3:42 a.m.
      • Nackgammon Opening Rolls
        Nack Ballard -- Tuesday, 6 April 2010, at 3:57 a.m.
        • Backgammon MET differs from Nack MET
          Paul Weaver -- Tuesday, 6 April 2010, at 12:40 p.m.
          • Backgammon MET differs from Nack MET
            Neil Robins -- Tuesday, 6 April 2010, at 1:58 p.m.
  • Nackgammon Opening Rolls
    David Levy -- Tuesday, 6 April 2010, at 3:35 a.m.
    • Nackgammon Opening Rolls
      Sam Pottle -- Tuesday, 6 April 2010, at 1:37 p.m.
  • NG Opening 21
    Nack Ballard -- Tuesday, 6 April 2010, at 3:47 a.m.
    • NG Opening 21
      KenB -- Tuesday, 6 April 2010, at 4:38 a.m.
    • NG Opening 21
      Petter Bengtsson -- Tuesday, 6 April 2010, at 9:13 a.m.
    • NG Opening 21
      Nack Ballard -- Monday, 19 April 2010, at 8:28 a.m.