A reference position for an opening double based on early 66

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9A 9A probably plays very similarly to money.
There's an adage that, to have a double based on an early 66,
you need to have improved your position but only slightly.
Automatically doubling whenever you get an early 66 will lead
you to many premature doubles.

According to XG's analysis, this position is exactly on the border
between double and hold.

Paul

XGID=aaB---E-A---dEa--cBe------:0:0:1:00:2:2:0:11:10

X:Daniel O:XG Roller+
Score is X:2 O:2 11 pt.(s) match.
[phone]------19-20-21-22-23-24-+
| X O O X | | O |
| X O X | | O |
| X O | | O |
| X | | O |
| X | | O |
| |BAR| |
| | O | X |
| O | | X |
| O | | X |
| O | | X X |
| O X | | X X O |
[phone]-------6--5--4--3--2--1-+
Pip count X: 143 O: 166 X-O: 2-2/11
Cube: 1
X on roll, cube action

Analyzed in 4-ply
Player Winning Chances: 63.21% (G:24.51% B:1.16%)
Opponent Winning Chances: 36.79% (G:7.77% B:0.32%)

Cubeless Equities: No Double=+0.440, Double=+0.904

Cubeful Equities:
No double: +0.615 (-0.004)
Double/Take: +0.619
Double/Pass: +1.000 (+0.381)

Best Cube action: Double / Take

eXtreme Gammon Version: 2.10, MET: Kazaross XG2

[Timothy Chow]

Post by ***@gmail.com
9A 9A probably plays very similarly to money.
There's an adage that, to have a double based on an early 66,
you need to have improved your position but only slightly.

Well, that's assuming you play the 66 the way the computer does.
The computer would never play 66 the way you played it here.

---
Tim Chow

[[e-mail]]

Post by Timothy Chow

Post by ***@gmail.com
9A 9A probably plays very similarly to money.
There's an adage that, to have a double based on an early 66,
you need to have improved your position but only slightly.

Well, that's assuming you play the 66 the way the computer does.
The computer would never play 66 the way you played it here.
---
Tim Chow

How bad was my play?

[Timothy Chow]

Post by ***@gmail.com

Post by Timothy Chow

Post by ***@gmail.com
9A 9A probably plays very similarly to money.
There's an adage that, to have a double based on an early 66,
you need to have improved your position but only slightly.

Well, that's assuming you play the 66 the way the computer does.
The computer would never play 66 the way you played it here.

How bad was my play?

XGID=-aa---E-C---dEa--c-e----B-:0:0:1:66:2:2:0:11:10

Score is X:2 O:2 11 pt.(s) match.
[phone]------19-20-21-22-23-24-+
| X O O | | O X |
| X O | | O X |
| X O | | O |
| X | | O |
| X | | O |
| |BAR| |
| | | X |
| O | | X |
| O X | | X |
| O X | | X |
| O X | | X O O |
[phone]-------6--5--4--3--2--1-+
Pip count X: 167 O: 164 X-O: 2-2/11
Cube: 1
X to play 66

1. XG Roller++ 24/18(2) 13/7(2) eq:+0.538
Player: 63.22% (G:15.66% B:0.53%)
Opponent: 36.78% (G:7.08% B:0.24%)

2. XG Roller++ 24/18(2) 8/2*(2) eq:+0.278 (-0.261)
Player: 56.12% (G:16.65% B:0.62%)
Opponent: 43.88% (G:9.98% B:0.37%)

eXtreme Gammon Version: 2.19.211.pre-release, MET: Kazaross XG2

---
Tim Chow