Position 89, page 173
From The Backgammon Book, by Oswald Jacoby and John R. Crawford

White to play 6-1.

Your correct play in 89 is to move to the position in Diagram 91.

The reason is that you calculate that black will be off in three rolls, and thus you expect only two more turns after this one. By moving a man from the six to the five point, you will be able to bear off four men with either double 5 or double 6.

Diag. 91: 6/off, 6/5
Rollout 
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Money play
White owns 2-cube
White rolls 6-1

1296 games with VR
Checker play: 3-ply
Cube play: XG Roller
XGID=--BAAAB---------------bbb-:1:1:1:61:0:0:0:0

6-1: Game BG   Equity
1 6/5, 6/off W
L
.0708
.9292
.0000
.0000
.0000
.0000
−0.8376 x  Diag. 91
2 6/off, 2/1 W
L
.0688
.9312
.0000
.0000
.0000
.0000
−0.8608 (0.0232) 
3 6/off, 5/4 W
L
.0527
.9473
.0000
.0000
.0000
.0000
−0.8835 (0.0459) 
4 6/off, 4/3 W
L
.0480
.9520
.0000
.0000
.0000
.0000
−0.8928 (0.0552) 
5 6/off, 3/2 W
L
.0441
.9559
.0000
.0000
.0000
.0000
−0.9008 (0.0632) 

Previous Position
No. 88, page 172
Next Position
No. 90, page 173

List of Positions from The Backgammon Book

The Backgammon Book (1970), by Oswald Jacoby and John R. Crawford

Backgammon Galore : Books