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interests / rec.games.backgammon / I was right but I wrongly thought I was wrong

I was right but I wrongly thought I was wrong

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Subject: I was right but I wrongly thought I was wrong
From: pepste...@gmail.com (peps...@gmail.com)
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by: peps...@gmail.com - Mon, 22 Jan 2024 16:34 UTC

Here I made the right play but didn't give it much thought.
Afterwards, I felt sure this was an error.
Ace point games generate a lot of shots of course, and I
expected to be penalised for not clearing the 6 point.
The reason I was bearing off somewhat greedily was that I
hoped for the backgammon.
It also appears to be the best play at DMP.

I think 6/4 6/2 is not actually "safe" but gets the worst of both
worlds. Not only do we not bear off but we blot to 44/55/66.

I didn't realise this aspect and played the right play to bear off
a checker aiming for the backgammon.

Right play, wrong reason.

Paul

XGID=-fBBDEB----------bbcb-----:1:-1:1:42:2:0:0:11:10

X:Daniel O:XG Roller+
Score is X:2 O:0 11 pt.(s) match.
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O O | | O O | +---+
| O O | | O O | | 2 |
| | | O | +---+
| | | |
| | | |
| |BAR| |
| | | X 6 |
| | | X X O |
| | | X X O |
| | | X X X X X O |
| | | X X X X X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 63 O: 202 X-O: 2-0/11
Cube: 2, O own cube
X to play 42

1. 4-ply 5/3 4/Off eq:+1.373
Player: 81.82% (G:64.41% B:19.91%)
Opponent: 18.18% (G:0.00% B:0.00%)

2. 4-ply 6/4 6/2 eq:+1.286 (-0.087)
Player: 79.83% (G:63.19% B:17.32%)
Opponent: 20.17% (G:0.03% B:0.00%)

3. 3-ply 4/2 4/Off eq:+1.220 (-0.153)
Player: 77.65% (G:60.87% B:18.86%)
Opponent: 22.35% (G:0.00% B:0.00%)

4. 1-ply 6/2 5/3 eq:+1.029 (-0.345)
Player: 73.90% (G:56.47% B:14.41%)
Opponent: 26.10% (G:0.81% B:0.02%)

5. 1-ply 6/Off eq:+0.969 (-0.404)
Player: 71.52% (G:54.17% B:16.02%)
Opponent: 28.48% (G:0.00% B:0.00%)

eXtreme Gammon Version: 2.10, MET: Kazaross XG2

Re: I was right but I wrongly thought I was wrong

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Re: I was right but I wrongly thought I was wrong
Date: Wed, 24 Jan 2024 08:56:20 -0500
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by: Timothy Chow - Wed, 24 Jan 2024 13:56 UTC

On 1/22/2024 11:34 AM, peps...@gmail.com wrote:
> Here I made the right play but didn't give it much thought.
> Afterwards, I felt sure this was an error.

I see something here which I've noticed repeatedly in your
analysis of bearoff plays. You don't realize how bad it is
to put extra checkers on your 2pt, especially with no spares
on your 3pt.

---
Tim Chow

Re: I was right but I wrongly thought I was wrong

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Subject: Re: I was right but I wrongly thought I was wrong
From: pepste...@gmail.com (peps...@gmail.com)
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by: peps...@gmail.com - Wed, 24 Jan 2024 14:27 UTC

On Wednesday, January 24, 2024 at 1:56:23 PM UTC, Timothy Chow wrote:
> On 1/22/2024 11:34 AM, peps...@gmail.com wrote:
> > Here I made the right play but didn't give it much thought.
> > Afterwards, I felt sure this was an error.
> I see something here which I've noticed repeatedly in your
> analysis of bearoff plays. You don't realize how bad it is
> to put extra checkers on your 2pt, especially with no spares
> on your 3pt.
>
> ---
> Tim Chow

Good point.
It reminds me of the old riddle.
What's the difference between Axel Reichert and Paul Epstein?
Axel's Isight algorithm penalises spares on the 2 point.

Subject	Author
I was right but I wrongly thought I was wrong	peps...@gmail.com
Re: I was right but I wrongly thought I was wrong	Timothy Chow
Re: I was right but I wrongly thought I was wrong	peps...@gmail.com