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41$-44x-xxx cube decisions.

Posted By: Nack Ballard
Date: Wednesday, 30 March 2011, at 7:44 a.m.

In Response To: Cube Action After Black Fans With Both (Paul Weaver)

41$-44

From David Rockwell's research notes of GnuBG cube errors after 41$-44:

After 41$-44C- {dance} GNU erroneously doubles and passes. The proper cube action is D/T. This inappropriately raises the equity of C by .0133.

After 41$-44C {enters with one} GNU erroneously doubles. The proper cube action is ND/T. This inappropriately lowers the equity of C by .0078.

After 41$-44B {21, 31, 41, 43, 51, 54, 61, 63, 64 or 65} GNU erroneously doubles. The proper cube action is ND/T. This inappropriately lowers the equity of B by .0305.

Key: C = Cross (24/16* 8/4(2), B = Both (24/16* 13/9(2)).

These notes answers (among others) Paul's question about 41$-44C-F-C. It's a double/take. I suppose that means that 41$-44B-F-C is a double/take as well.

Another observation is that the raw GnuBG data is [C B25] /20. After correcting for the above cube errors, Gnu's result is adjusted to [B C11] /20. (!) This adjusted margin closely agrees with Snowie and XG 4-ply rollouts but not with the XG 3-ply rollout.

Nack

Messages In This Thread

• For Nack 41$-44 XG2 3 ply RO
  neilkaz -- Monday, 28 March 2011, at 1:36 p.m.
  • 41$-44 data
    Nack Ballard -- Monday, 28 March 2011, at 2:03 p.m.
  • Cube Action After Black Fans With Both
    Paul Weaver -- Tuesday, 29 March 2011, at 5:41 p.m.
    • RO's started *NM*
      neilkaz -- Wednesday, 30 March 2011, at 3:56 a.m.
    • 41$-44x-xxx cube decisions.
      Nack Ballard -- Wednesday, 30 March 2011, at 7:44 a.m.
      • RO of takes after fanning with both
        neilkaz -- Wednesday, 30 March 2011, at 11:58 a.m.