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Unintentional Four-score position

Posted By: Nack Ballard
Date: Tuesday, 20 June 2017, at 6:17 a.m.

In Response To: Midgame doubles #1 (Karol Szczerek)





White is Player 2

score: 0
pip: 154
Unlimited Game
Jacoby Beaver
pip: 157
score: 0

Blue is Player 1
XGID=-a-a--EBB-A-dC---c-d-b--B-:0:0:1:44:0:0:3:0:10

42P-61P-63R-21H-53Z-44


What are the odds against someone posting an R4 (real four-score position) unintentionally?

The odds against posting a T4 (technical four-score position) unintentionally are already long enough. I don't think it's ever been done.

Karol's position, shown above, is at least a T4. Moreover, by my rollouts, it already clears the non-tied margins at three scores, and at gammon save (+.0070 needed) it is in slight plus territory (+.0074 after 41k, still extending).

Below, I've given White her 3pt (instead of 4pt) and moved the 8pt spare back to her midpoint. The position below is definitely an R4. [I'm pretty sure it's also an R4 even if we use a composite of the positions, with White having her 4pt and a stripped 8pt.]

Looking either at Karol's position (above) or mine (below), and knowing that each score has a different best play, how would you play double 4s for (a) Money, (b) DMP, (c) gammon save, and (d) gammon go?

Nack





White is Player 2

score: 0
pip: 157
Unlimited Game
Jacoby Beaver
pip: 157
score: 0

Blue is Player 1
XGID=-a-a--EBB-A-eC---b-d--b-B-:0:0:1:44:0:0:3:0:10

53P-61P-63R-21H-21U-44


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