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interests / rec.games.backgammon / Re: 5 away-3 away, 44 to play

SubjectAuthor
* 5 away-3 away, 44 to playBlueDice
+- Re: 5 away-3 away, 44 to playBlueDice
+- Re: 5 away-3 away, 44 to playTimothy Chow
+- Re: 5 away-3 away, 44 to playah...Clem
`- Re: 5 away-3 away, 44 to playBlueDice

1
5 away-3 away, 44 to play

<bb9254bc-bf03-4b32-b128-fa71169f4ab9n@googlegroups.com>

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Subject: 5 away-3 away, 44 to play
From: bluedice...@gmail.com (BlueDice)
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 by: BlueDice - Mon, 17 Oct 2022 13:41 UTC

XGID=-a-ABCBB-------b-bBbbABea-:1:1:1:44:4:6:0:9:10
X:Player 1 O:Player 2

This is a recent position from facebook

Score is X:4 O:6 9 pt.(s) match.
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O O X | | O O X X O O |
| O O X | | O O X O |
| | | O |
| | | O |
| | | O |
| |BAR| |
| | | |
| | | |
| | | X | +---+
| X | | X X X | | 2 |
| X | | X X X X O | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 153 O: 93 X-O: 4-6/9
Cube: 2, X own cube
X to play 44

Re: 5 away-3 away, 44 to play

<6794260f-7541-475d-b7da-adf418644dafn@googlegroups.com>

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Newsgroups: rec.games.backgammon
Date: Mon, 17 Oct 2022 07:22:41 -0700 (PDT)
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Subject: Re: 5 away-3 away, 44 to play
From: bluedice...@gmail.com (BlueDice)
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 by: BlueDice - Mon, 17 Oct 2022 14:22 UTC

On Monday, October 17, 2022 at 2:41:05 PM UTC+1, BlueDice wrote:
> XGID=-a-ABCBB-------b-bBbbABea-:1:1:1:44:4:6:0:9:10
> X:Player 1 O:Player 2
>
> This is a recent position from facebook
>
> Score is X:4 O:6 9 pt.(s) match.
> +13-14-15-16-17-18------19-20-21-22-23-24-+
> | O O X | | O O X X O O |
> | O O X | | O O X O |
> | | | O |
> | | | O |
> | | | O |
> | |BAR| |
> | | | |
> | | | |
> | | | X | +---+
> | X | | X X X | | 2 |
> | X | | X X X X O | +---+
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 153 O: 93 X-O: 4-6/9
> Cube: 2, X own cube
> X to play 44

X holds a 2 cube..

Re: 5 away-3 away, 44 to play

<tim5df$3ns0i$1@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Re: 5 away-3 away, 44 to play
Date: Tue, 18 Oct 2022 08:15:43 -0400
Organization: A noiseless patient Spider
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 by: Timothy Chow - Tue, 18 Oct 2022 12:15 UTC

On 10/17/2022 9:41 AM, BlueDice wrote:
> XGID=-a-ABCBB-------b-bBbbABea-:1:1:1:44:4:6:0:9:10
> X:Player 1 O:Player 2
>
> This is a recent position from facebook
>
> Score is X:4 O:6 9 pt.(s) match.
> +13-14-15-16-17-18------19-20-21-22-23-24-+
> | O O X | | O O X X O O |
> | O O X | | O O X O |
> | | | O |
> | | | O |
> | | | O |
> | |BAR| |
> | | | |
> | | | |
> | | | X | +---+
> | X | | X X X | | 2 |
> | X | | X X X X O | +---+
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 153 O: 93 X-O: 4-6/9
> Cube: 2, X own cube
> X to play 44

Two things jump out at me in this position. The first, of
course, is that we'd really like to contain O's straggler
since we're so far behind in the pip count. The second is
that O is totally stripped, with a bunch of semi-dead checkers.

X can try to prime, or X can try to attack. Unfortunately,
X can't extend his four-prime to a five-prime with this roll.
I guess 18/6 18/14 is the best priming attempt, but I'm inclined
to attack with 7/3 5/1*. We're happy if O dances, of course,
and even if O enters, there's a good chance she'll be forced to
expose a blot because of her stripped position. For the final
two 4's, I'd try 18/10, preparing to re-cover the bar point.

---
Tim Chow

Re: 5 away-3 away, 44 to play

<tirlh5$blkl$1@dont-email.me>

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From: ah_c...@ymail.com (ah...Clem)
Newsgroups: rec.games.backgammon
Subject: Re: 5 away-3 away, 44 to play
Date: Thu, 20 Oct 2022 10:21:18 -0400
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 by: ah...Clem - Thu, 20 Oct 2022 14:21 UTC

On 10/17/2022 9:41 AM, BlueDice wrote:
> XGID=-a-ABCBB-------b-bBbbABea-:1:1:1:44:4:6:0:9:10
> X:Player 1 O:Player 2
>
> This is a recent position from facebook
>
> Score is X:4 O:6 9 pt.(s) match.
> +13-14-15-16-17-18------19-20-21-22-23-24-+
> | O O X | | O O X X O O |
> | O O X | | O O X O |
> | | | O |
> | | | O |
> | | | O |
> | |BAR| |
> | | | |
> | | | |
> | | | X | +---+
> | X | | X X X | | 2 |
> | X | | X X X X O | +---+
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 153 O: 93 X-O: 4-6/9
> Cube: 2, X own cube
> X to play 44

X has two ways to win this one. Contain O's straggler or wait for O to
crunch and expose a shot (she's well on her way with that ugly stack on
the deuce point).

The eighteen point isn't doing much for X, so play off of that. I prefer
18/6 18/14 to bring another builder into range and also to keep a guard
for outfield control.

Re: 5 away-3 away, 44 to play

<73636713-4ed1-435f-8145-5c14b4e8c2fen@googlegroups.com>

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Subject: Re: 5 away-3 away, 44 to play
From: bluedice...@gmail.com (BlueDice)
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 by: BlueDice - Thu, 20 Oct 2022 18:43 UTC

On Monday, October 17, 2022 at 2:41:05 PM UTC+1, BlueDice wrote:
> XGID=-a-ABCBB-------b-bBbbABea-:1:1:1:44:4:6:0:9:10
> X:Player 1 O:Player 2
>
> This is a recent position from facebook
>
> Score is X:4 O:6 9 pt.(s) match.
> +13-14-15-16-17-18------19-20-21-22-23-24-+
> | O O X | | O O X X O O |
> | O O X | | O O X O |
> | | | O |
> | | | O |
> | | | O |
> | |BAR| |
> | | | |
> | | | |
> | | | X | +---+
> | X | | X X X | | 2 |
> | X | | X X X X O | +---+
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 153 O: 93 X-O: 4-6/9
> Cube: 2, X own cube
> X to play 44

Solution
=======
There's not much in the top 3 plays (XGR++) at 5 away - 3 away...
However, the #1 play here is a clear blunder for an unlimited match, see variant.
I believe that X is playing relatively quietly to protect his potential pending efficient re-cube AtS
where he kills O's gammons but not his own.
I thought that this was a good example of cube dependant checker play.

1. XG Roller++ 18/14 18/6 eq:+0.950
Player: 66.48% (G:19.82% B:0.91%)
Opponent: 33.52% (G:17.39% B:0.46%)

2. XG Roller++ 22/14(2) eq:+0.929 (-0.020)
Player: 65.51% (G:16.24% B:0.61%)
Opponent: 34.49% (G:18.36% B:0.25%)

3. XG Roller++ 18/14(2) 7/3 5/1* eq:+0.928 (-0.021)
Player: 66.66% (G:20.98% B:0.73%)
Opponent: 33.34% (G:15.21% B:0.53%)

4. 3-ply 18/10(2) eq:+0.896 (-0.053)
Player: 65.18% (G:17.20% B:0.92%)
Opponent: 34.82% (G:15.81% B:0.23%)

Variant
======
Score is X:0 O:0. Unlimited Game
Cube: 2, X own cube
X to play 44

1. XG Roller++ 18/14(2) 7/3 5/1* eq:+0.701
Player: 66.36% (G:21.12% B:0.77%)
Opponent: 33.64% (G:14.82% B:0.49%)

2. XG Roller++ 22/14 7/3 5/1* eq:+0.639 (-0.062)
Player: 65.37% (G:21.38% B:0.87%)
Opponent: 34.63% (G:16.94% B:0.68%)

3. XG Roller++ 18/10 7/3 5/1* eq:+0.626 (-0.075)
Player: 64.69% (G:21.38% B:0.98%)
Opponent: 35.31% (G:17.45% B:1.02%)

4. XG Roller++ 18/14 18/6 eq:+0.568 (-0.133)
Player: 66.36% (G:19.84% B:0.92%)
Opponent: 33.64% (G:17.64% B:0.45%)
--
BD

1
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