novaBBS - rec.games.backgammon - A reference position for an opening double based on early 66

A reference position for an opening double based on early 66

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Subject: A reference position for an opening double based on early 66
From: pepste...@gmail.com (peps...@gmail.com)
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by: peps...@gmail.com - Mon, 22 Jan 2024 16:46 UTC

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.
+13-14-15-16-17-18------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 |
+12-11-10--9--8--7-------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

Re: A reference position for an opening double based on early 66

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Re: A reference position for an opening double based on early 66
Date: Wed, 24 Jan 2024 08:58:37 -0500
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by: Timothy Chow - Wed, 24 Jan 2024 13:58 UTC

On 1/22/2024 11:46 AM, peps...@gmail.com wrote:
> 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

Re: A reference position for an opening double based on early 66

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Subject: Re: A reference position for an opening double based on early 66
From: pepste...@gmail.com (peps...@gmail.com)
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by: peps...@gmail.com - Wed, 24 Jan 2024 14:24 UTC

On Wednesday, January 24, 2024 at 1:58:40 PM UTC, Timothy Chow wrote:
> On 1/22/2024 11:46 AM, peps...@gmail.com wrote:
> > 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?

Re: A reference position for an opening double based on early 66

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Re: A reference position for an opening double based on early 66
Date: Wed, 24 Jan 2024 22:03:17 -0500
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by: Timothy Chow - Thu, 25 Jan 2024 03:03 UTC

On 1/24/2024 9:24 AM, peps...@gmail.com wrote:
> On Wednesday, January 24, 2024 at 1:58:40 PM UTC, Timothy Chow wrote:
>> On 1/22/2024 11:46 AM, peps...@gmail.com wrote:
>>> 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.
+13-14-15-16-17-18------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 |
+12-11-10--9--8--7-------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

$3,000,000.

interests / rec.games.backgammon / A reference position for an opening double based on early 66

Subject	Author
A reference position for an opening double based on early 66	peps...@gmail.com
Re: A reference position for an opening double based on early 66	Timothy Chow
Re: A reference position for an opening double based on early 66	peps...@gmail.com
Re: A reference position for an opening double based on early 66	Timothy Chow