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Possible four-score position

Posted By: Nack Ballard
Date: Sunday, 8 March 2015, at 12:13 a.m.

In Response To: Possible four-score position (Timothy Chow)

		White is Player 2 score: 0 pip: 119 Unlimited Game Jacoby Beaver pip: 121 score: 0 Blue is Player 1
XGID=---CBBBbB---bB----beBbaa--:0:0:1:53:0:0:3:0:10
Blue to play 53

Thanks to Tim, who (by e-mail) alerted me to this thread.

Tim's position might be a T4 (technical four-score position), though I believe the odds are against it. Much longer rollouts are needed for a clear verdict.

I recommend moving a White spare from her 4pt back to her 6pt, thereby creating the position shown above. This produces a more diverse set of XGR++ evaluations:

.....m.[J D8 R18 O21 C27]
.....d..[R D12 J18 C24 O27]
.....s...[D O39 R97 J104]
.....g...[C J4 O49 E51 R112]

C = Cross (20/15 8/5), D = Down (13/10 13/8), E = Each (20/15 6/3), J = Jump (8/5 8/3), O = Outer (13/5), R = Run (20/17 20/15).

The biggest threats to T4 status are probably R for money (note how much it improved between eval and 1k rollout in Tim's post) and J at gammon go. Perhaps someone would like to do rollout(s) at the various scores, or if not then someday they will reach the top of my queue. :)

Nack

Nactation tutorial • explanation of nacbracs

Messages In This Thread

• Possible four-score position
  Timothy Chow -- Saturday, 7 March 2015, at 4:23 p.m.
  • Possible four-score position
    Stick -- Saturday, 7 March 2015, at 4:35 p.m.
  • Possible four-score position
    Nack Ballard -- Sunday, 8 March 2015, at 12:13 a.m.
    • Four Score -- R4 found
      Nack Ballard -- Sunday, 8 March 2015, at 11:17 p.m.
      • Four Score -- R4 found
        Timothy Chow -- Monday, 9 March 2015, at 1:22 a.m.
      • Four Score -- R4 verified (3- and 4-ply rollouts)
        Nack Ballard -- Friday, 13 March 2015, at 4:25 p.m.