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Rollout: Is this Bagaic?

Posted By: David Levy
Date: Thursday, 28 June 2012, at 6:21 p.m.

In Response To: Rollout: Is this Bagaic? (neilkaz)

If I wanted to get better at this game, this is the sort of work I would have to do... [Aside: I've managed to invert some of the diagrams. I am doing analysis here and not rollouts. I also have left the original score, so money play will be different.]

NK: "I am underrating the likely 2 pt game"

The two point game wins about 15% while losing 40+% gammons.





White is Player 2

score: 4
pip: 50
7 point match
pip: 132
score: 0

Blue is Player 1
XGID=aCaCDBB-----b----b-db-ba--:1:-1:-1:32:4:0:0:7:10
Blue to play 32

1.XG Roller++Bar/23 13/10eq: -0.891
Player:
Opponent:
14.78% (G:0.00% B:0.00%)
85.22% (G:40.67% B:1.41%)

eXtreme Gammon Version: 2.03, MET: Kazaross XG2

NK: "...and over rating the opps chances if I get hit right away after switching."

22% wins and 46% gammons:





White is Player 2

score: 4
pip: 51
7 point match
pip: 134
score: 0

Blue is Player 1
XGID=bCBCCAC-----b----b-db-ba--:1:-1:-1:52:4:0:0:7:10
Blue to play 52

1.XG Roller++Bar/20* eq: -0.668
Player:
Opponent:
22.17% (G:1.53% B:0.04%)
77.83% (G:46.21% B:0.30%)

eXtreme Gammon Version: 2.03, MET: Kazaross XG2

The condition of defender's board is crucial. With the four point, switching is awful.





White is Player 2

score: 0
pip: 128
7 point match
pip: 55
score: 4

Blue is Player 1
XGID=aCaDCBC-----b----b-bbbba--:1:-1:1:32:4:0:0:7:10
Blue to play 32

1.XG Roller++6/4 3/Offeq: +1.028
Player:
Opponent:
86.93% (G:53.09% B:1.25%)
13.07% (G:0.00% B:0.00%)
2.XG Roller++6/1eq: +0.944 (-0.084)
Player:
Opponent:
85.15% (G:47.34% B:0.69%)
14.85% (G:0.01% B:0.00%)
3.XG Roller++5/2* 4/2eq: +0.902 (-0.126)
Player:
Opponent:
82.24% (G:62.52% B:0.40%)
17.76% (G:1.16% B:0.04%)

eXtreme Gammon Version: 2.03, MET: Kazaross XG2

Indeed, just covering the blot on the deuce point makes the switch slightly wrong.





White is Player 2

score: 0
pip: 128
7 point match
pip: 55
score: 4

Blue is Player 1
XGID=aCaDCBC-----b----b-cb-bb--:1:-1:1:32:4:0:0:7:10
Blue to play 32

1.XG Roller++6/4 3/Offeq: +1.058
Player:
Opponent:
87.80% (G:54.13% B:1.25%)
12.20% (G:0.00% B:0.00%)
2.XG Roller++5/2* 4/2eq: +1.035 (-0.022)
Player:
Opponent:
86.14% (G:61.57% B:0.36%)
13.86% (G:0.65% B:0.02%)
3.XG Roller++6/1eq: +0.979 (-0.079)
Player:
Opponent:
86.20% (G:48.96% B:0.67%)
13.80% (G:0.06% B:0.00%)

eXtreme Gammon Version: 2.03, MET: Kazaross XG2

Here's a break even position (at the score):





White is Player 2

score: 0
pip: 134
7 point match
pip: 55
score: 4

Blue is Player 1
XGID=aCaDCBC-----b----b-ccba---:1:-1:1:32:4:0:0:7:10
Blue to play 32

1.XG Roller++5/2* 4/2eq: +1.080
Player:
Opponent:
86.59% (G:66.73% B:0.43%)
13.41% (G:0.86% B:0.02%)
2.XG Roller++6/4 3/Offeq: +1.072 (-0.008)
Player:
Opponent:
87.60% (G:56.82% B:1.39%)
12.40% (G:0.00% B:0.00%)

eXtreme Gammon Version: 2.03, MET: Kazaross XG2

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