[ View Thread ] [ Post Response ] [ Return to Index ] [ Read Prev Msg ] [ Read Next Msg ]

BGonline.org Forums

Not surprised I got this one wrong - XGR+ EVAL & variations

Posted By: Rich Munitz
Date: Saturday, 16 January 2010, at 7:43 a.m.

In Response To: Not surprised I got this one wrong (Rich Munitz)

Well I was indeed on autopilot. But I did take a moment to consider whether to leave the single blot on the 9 point for 4 shots or on the 10 point for 2. Yippee! I picked the best wrong play.

Anyway, the moment I saw this error come up it was immediately obvious to me that two down is correct. Clear enough to me at least that I'm going to be satisfied with the XGR+ eval and not bother with a rollout.

is Player 2

score: 1
pip: 130
7 point match
pip: 148
score: 0

is Player 1
XGID=--a--BCBB--AbC-bbc-bB-ab--:0:0:1:43:0:1:0:7:10
to play 43

1.XG Roller+13/10 13/9eq: +0.611
Player:
Opponent:		 64.18% (G:14.67% B:0.50%)
35.82% (G:7.91% B:0.30%)
2.XG Roller+13/9 11/8eq: +0.540 (-0.070)
Player:
Opponent:		 62.51% (G:14.77% B:0.46%)
37.49% (G:6.53% B:0.21%)
3.XG Roller+13/10 11/7eq: +0.520 (-0.091)
Player:
Opponent:		 61.84% (G:15.42% B:0.45%)
38.16% (G:6.46% B:0.20%)

eXtreme Gammon Version: 1.11, MET: GnuBG 11 point

The blot on the 22 point is important to making the blotty play right, but not essential. Move the blot back to the 6 point and two down still comes out on top, but by half the margin.

is Player 2

score: 1
pip: 133
7 point match
pip: 148
score: 0

is Player 1
XGID=--a--BCBB--AbC-bbc-cB--b--:0:0:1:43:0:1:0:7:10
to play 43

1.XG Roller+13/10 13/9eq: +0.513
Player:
Opponent:		 62.04% (G:13.75% B:0.41%)
37.96% (G:8.40% B:0.32%)
2.XG Roller+13/9 11/8eq: +0.481 (-0.032)
Player:
Opponent:		 61.03% (G:14.50% B:0.43%)
38.97% (G:6.43% B:0.21%)

eXtreme Gammon Version: 1.11, MET: GnuBG 11 point

The weak two point board on the other side is also a key factor, but make it a 3 point board, by making the 3 point and it is still nearly correct to bring two down. Shift the 3 point to the 1 point, and two down comes out best once again.

is Player 2

score: 1
pip: 125
7 point match
pip: 148
score: 0

is Player 1
XGID=--a--BCBB--AbC-bbb-bB-bb--:0:0:1:43:0:1:0:7:10
to play 43

1.XG Roller+13/9 11/8eq: +0.426
Player:
Opponent:		 60.66% (G:13.23% B:0.42%)
39.34% (G:7.59% B:0.23%)
2.XG Roller+13/10 13/9eq: +0.419 (-0.007)
Player:
Opponent:		 60.96% (G:11.40% B:0.40%)
39.04% (G:10.76% B:0.40%)

eXtreme Gammon Version: 1.11, MET: GnuBG 11 point

is Player 2

score: 1
pip: 121
7 point match
pip: 148
score: 0

is Player 1
XGID=--a--BCBB--AbC-bbb-bB--bb-:0:0:1:43:0:1:0:7:10
to play 43

1.XG Roller+13/10 13/9eq: +0.496
Player:
Opponent:		 62.37% (G:12.75% B:0.46%)
37.63% (G:11.87% B:0.37%)
2.XG Roller+13/9 11/8eq: +0.465 (-0.031)
Player:
Opponent:		 61.64% (G:13.93% B:0.47%)
38.36% (G:8.64% B:0.19%)

eXtreme Gammon Version: 1.11, MET: GnuBG 11 point

Does black's outside prime encourage or discourage the aggressive counterpriming play? It would seem that the danger of getting hit and stuck behind black's prime outweighs the need to counterprime. With the 3 point already made once again, two down is clearly stronger with black having a weaker outside prime.

is Player 2

score: 1
pip: 120
7 point match
pip: 148
score: 0

is Player 1
XGID=--a--BCBB--AbC--cb-cB-bb--:0:0:1:43:0:1:0:7:10
to play 43

1.XG Roller+13/10 13/9eq: +0.492
Player:
Opponent:		 63.12% (G:11.08% B:0.39%)
36.88% (G:11.01% B:0.38%)
2.XG Roller+13/9 11/8eq: +0.458 (-0.033)
Player:
Opponent:		 61.43% (G:12.10% B:0.38%)
38.57% (G:7.87% B:0.20%)

eXtreme Gammon Version: 1.11, MET: GnuBG 11 point

Messages In This Thread

 

Post Response
Your Name:
Your E-Mail Address:
Subject:
Message:

If necessary, enter your password below:

Password:
 

 

[ View Thread ] [ Post Response ] [ Return to Index ] [ Read Prev Msg ] [ Read Next Msg ]

BGonline.org Forums is maintained by Stick with WebBBS 5.12.