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Nactation help needed — Correction

Posted By: Taper_Mike
Date: Wednesday, 15 February 2012, at 8:25 p.m.

In Response To: Nactation help needed (Taper_Mike)

On second consideration, there is a small error.

41S-21S-51S played 23/18 9/8 should be nactated in the B (Both) family, 41S-21S-51B. On a roll of non-doublets, S and Z must split, and then play from the far outer board into the outer board. A play that splits, and then moves entirely within the outer board is nactated B.

Definitions: B (Both), S (Split) and Z (Reverse split)
Family Non-doublets Doublets
B One die is played on the far side, and one die is played entirely within the outer board (on the near side). Two dice are played on the far side, and two dice are played down.
S The larger die is played on the far side, and the smaller die is played into the outer board from the opponent's outer board. When no such play exists, S can also be used as an alternative to Z. Three dice are played on the far side, and one die is played down. When no such play exists, S can also be used as an alternative to Z.
Z The smaller die is played on the far side, and the larger die is played into the outer board from the opponent's outer board. One die is played on the far side, and three dice are played down.

In all of these definitions, “down” refers to, “A move made to or within the outer board. The checker must land in the outer board on the near side, but can be moved from any point in either outer board.”

A play on the far side of the board means, “The entire move is made on the far side of the board, including entering a checker from the bar. The checker can land anywhere on the far side, from the midpoint on up.”

Mike

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