Thinking about Replies to 6X rolls

Generally hit with 42 and make a point with 31.

When you hit with a six, the other number splits from the back checker.

When you hit with an ace, the other number comes down from the midpoint.
** see 64S-41X exception below

Doubles are pretty easy ...

11.  Always near 8/7*(2), 6/5(2)
22.  Always near 13/11(2), 6/4(2) but 64S is an excpetion.  This is the only time you use full roll to hit with 22 - 24/16*.
33.  Always point on head 13/7*(2)
44.  Generally both 24/20(2), 13/9(2) but 64S is an exception since you hit.  Here Run 24/16*(2) is best.
55.  Attack 8/3(2), 6/1*(2) is obvious     ** edited 3/28
66.  24/18(2), 13/7(2) of course

'Always Hit and Split when you roll a missing 5X.'  Actually 63S-52S may be best, but you can't go wrong by hitting and splitting.

64S plays a bit different due to the superbuilder on the 9 point.
** 64S-41X.  You need to confront the 9 point blot
** 64S-22H.  You need to hit b/c the 9 point builder is too strong.
**64S-44R.  Hit and Run is best.
** 64S-31.  Hit and Split (13/10*, 24/23 and make a point 8/5, 6/5 are tied)

43 and 32 are generally played for duplication.
However 62S-32 is an excpetion.  Here Up 24/21. 24/22 and Wild 24/21, 6/4 are tied.

Always Kill with 65 - 13/7*, 6/1*.