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Nactation for White's 33 play

Posted By: Nack Ballard
Date: Thursday, 16 June 2016, at 11:00 p.m.

In Response To: Bonus question for Nack (Martin)

Clever! Too bad the sequence is not perfect play, or that at least it is not "trumped" by a sequence with an even smaller error. Beautiful solution in any case.

The position with White's third roll double 3s is shown below, with XGR++ evaluation of the top three candidates:






White is Player 2

score: 0
pip: 166
Unlimited Game
Jacoby Beaver
pip: 164
score: 0

Blue is Player 1
XGID=aa----EAB--AdDa--c-e----B-:0:0:-1:33:0:0:3:0:10

62S-21H-33


1.XG Roller++Bar/22 24/18* 13/10eq: +0.268
Player:
Opponent:		55.66% (G:18.65% B:1.51%)
44.34% (G:11.91% B:0.59%)
2.XG Roller++Bar/22 24/18* 18/15eq: +0.260 (-0.007)
Player:
Opponent:		55.94% (G:16.79% B:1.09%)
44.06% (G:11.40% B:0.44%)
3.XG Roller++Bar/22 24/18* 11/8eq: +0.259 (-0.008)
Player:
Opponent:		55.49% (G:17.67% B:1.28%)
44.51% (G:11.41% B:0.41%)

Nactations:

---------------------------------
.....Z = bar/22 24/18* 13/10
.....R = bar/22 24/18*/15
.....z = bar/22 24/18* 11/8
---------------------------------

For doublets, "Z" (reverse split) refers to a move with one "far" portion (anywhere on the player's far side) and three portions "down" (to or within the player's outer board).

"R" (Run) refers to a move with all portions on the far side, where at least one is played past the 18pt (else U = Up).

The move played in Martin's sequence was 33z (finished off with -41H-54H-42).

Nack

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