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32Z-63H-42@-65R-31X-53Z-33A-F-C

Posted By: Nack Ballard
Date: Sunday, 9 March 2014, at 6:26 p.m.

In Response To: This cube at different match scores (and $) - XGR++ (Snua)





White is Player 2

score: 0
pip: 152
Unlimited Game
Jacoby Beaver
pip: 155
score: 0

Blue is Player 1
XGID=a--B-BC-A-A-eC---d-e-BA---:0:0:1:00:0:0:3:0:10

32Z-63H-42@-65R-31X-53Z-33A-F-C


For the position diagrammed, here is a nacbracs summary of the cube actions you evaluated on XG:

.................[D.. 76850]
........33 [D.. 89486]
........43 [D 1321405]
........42 [D 1586601]
........32 [D 1220267]

Normally, "&e is added after the brackets to indicate an XG2++ evaluation, but I skipped the clutter because I pre-identified the entire batch as evals. Also, I omitted the lead-up move sequence (32Z-63H-42@-65R-31X-53Z-33A-F-C) at the beginning of each row because it is the same for all (the one listed in the caption of the diagram).

In "cube nacbracs" (a term which lately I shorten to "nacubracs"), the cube action is given for the player on roll (D = Double or N = No double, or if it's a recube then R = Redouble or X = no redouble). This is followed by the equity in thousandths of a point (assuming no pass), followed by the error size if the wrong double/no-double action is delivered.

For example, 43 [D 1321405] means that at the 43 score, it is a Double, with an equity of 1.321 if the cube is taken (if passed, of course it is 1.000, everyone knows that). The error size of failing to double is .405. (In case you want to know the absolute equity of No double, then subtract: 1.321 .405 = .916.)

.........Nactation tutorial
........ Explanation of nacbracs
........ Cube nacbracs

The above order of rows matches the order of the rollouts in your post. Another idea is to start farthest from the end of the match and work closer (money, 43, 42, 33, 32).

Yet another order is by ascending doubling strength, which is shown below:

.................[D.. 76850]
........33 [D.. 89486]
........32 [D 1220267]
........43 [D 1321405]
........42 [D 1586601]

This order helps spotlight the nature of the match scores -- the ones at which one should be most aggressive. For the last and most aggressive of these scores (42), the position is almost too good to double (the .601 is only slightly larger than the .586 pass excess).

Nack

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