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n-on-m terminology

Posted By: mochy
Date: Wednesday, 22 September 2010, at 4:40 p.m.

In Response To: n-on-m terminology (storm)

I do not think it is a very popular way to call this kind of position, but I started to call a position below as 1 on 1 few years ago when I was studying them.

is Player 2

score: 0
pip: 83
Money session
Jacoby Beaver
pip: 86
score: 0

is Player 1
XGID=aBBBBBB--A-A-------ccccbA-:0:0:1:00:0:0:3:0:10
on roll, cube action?

eXtreme Gammon Version: 1.21

That is, by the way, last take position for black

This position below is 2 on 2.
is Player 2

score: 0
pip: 105
Money session
Jacoby Beaver
pip: 108
score: 0

is Player 1
XGID=bBBBBBB-----------AcccbbB-:0:0:1:00:0:0:3:0:10
on roll, cube action?


Analyzed in Rollout
No Double
Player Winning Chances: 69.11% (G: 24.86% B: 0.51%)
Opponent Winning Chances: 30.89% (G: 6.16% B: 0.26%)
Double/Take
Player Winning Chances: 68.61% (G: 24.90% B: 0.44%)
Opponent Winning Chances: 31.39% (G: 6.13% B: 0.26%)
Cubeless Equities
No Double:+0.382
Double:+1.124
Cubeful Equities
No Double:+0.587 (-0.331)
Double/Take:+0.918
Double/Drop:+1.000 (+0.082)
Best Cube action: Double / Take
Rollout details
548 Games rolled with Variance Reduction.
Dice Seed: 1341
Moves and cube decisions: 3 ply
Confidence No Double: ± 0.020 (+0.567...+0.606)
Confidence Double: ± 0.021 (+0.897...+0.939)
Double Decision confidence: 100.0%
Take Decision confidence: 100.0%
Duration: 10.4 seconds

eXtreme Gammon Version: 1.21

2 on 2 is almost always take.

This is 1 on 2.
is Player 2

score: 0
pip: 105
Money session
Jacoby Beaver
pip: 72
score: 0

is Player 1
XGID=bBCBCBB------------cccbbA-:0:0:1:00:0:0:3:0:10
on roll, cube action?


Analyzed in Rollout
No Double
Player Winning Chances: 70.72% (G: 20.13% B: 0.32%)
Opponent Winning Chances: 29.28% (G: 2.02% B: 0.07%)
Double/Take
Player Winning Chances: 70.96% (G: 20.46% B: 0.35%)
Opponent Winning Chances: 29.04% (G: 2.01% B: 0.07%)
Cubeless Equities
No Double:+0.414
Double:+1.213
Cubeful Equities
No Double:+0.596 (-0.404)
Double/Take:+1.022 (+0.022)
Double/Drop:+1.000
Best Cube action: Double / Drop
Rollout details
616 Games rolled with Variance Reduction.
Dice Seed: 1341
Moves and cube decisions: 3 ply
Confidence No Double: ± 0.013 (+0.583...+0.609)
Confidence Double: ± 0.015 (+1.008...+1.037)
Double Decision confidence: 100.0%
Take Decision confidence: 99.9%
Duration: 18.9 seconds

eXtreme Gammon Version: 1.21

1 on 2 is usually too good or double pass unless doubler's board starts crunching. This position is boarder line pass because his board is about to break.

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