White - Pips 160
Black - Pips 167
61P-66 — Black to Play 6-6
O (Outer) = 13/7(3), 8/2
Moves in the O (Outer) family split a roll half, playing half by moving into (or entirely within) the outer board, and playing the other half moving out. The first part plays to a destination in the outer board, either by moving from the opponent’s outer board, or else by moving entirely within your outer board. The second part moves out of the outer board and into the inner board.
- When you play 1-in/1-out or 2-in/2-out, use regular O.
- When you play 3-in/1-out use underlined O.
- When you play 1-in/3-out use dotted O. (letter O followed by period).
White - Pips 162
Black - Pips 167
41$-44 — Black to Play 4-4
B (Both) = 24/20*/16*, 13/9(2)
b (both) = 24/20*(2), 13/9(2)
Moves in the B (Both) family move both up and down. For a roll of doublets, two dice move up on the far side of the board. The other two dice move down to destinations in the outer board. When you play
down, you can move from the opponent’s outer board into your outer board, or else you can move entirely within your outer board. Last November, I updated my post at BGO entitled
Clarifying S (Split), Z (Reverse split), and B (Both). It contains a bit more information about the B (Both) family. Both uses slightly different rules when the roll is a non-doublet.
The Hit-More-Six Rule is used to rank plays in both of these families. The top-ranked play uses a capital letter, while the second- ranked play gets lower case. There are other rules for 3rd, 4th, and so on, but they do not come into play very often. The priorities of Hit-More-Six are just that: 1. Hit!, 2. Make more points!, 3. Move closer to the 6pt. In this position, the capital letter goes to the play that hits twice.
Nack Ballard, the creator of Nactation, has published a free
Nactation Tutorial. It makes for very easy reading. You can get the basics by reading only the first 10 or 12 pages.
The tutorial can also be treated as a set of backgammon problems if you wish. It contains 93 different positions. Just look at each diagram and decide what you would play before you read Nack’s explanations. Rollout data for all 93 positions are contained in an appendix.
Hope this helps.
Mike
Last edited by Taper_Mike; 10-23-2014 at 12:02 AM.