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Cube 113 - Backgame redouble to match point?

Author Topic: Cube 113 - Backgame redouble to match point?  (Read 4671 times)

Offline sixty_something

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Cube 113 - Backgame redouble to match point?
« on: February 07, 2008, 01:40:18 PM »
If the board image does not appear in the question above, you may view it in the attached PNG file below.

one vote per user .. results of the poll are shown after you have voted

then, open the text file below for a copy of the GNUbg analysis or you may enter the ID's below into GNUbg or Snowie to evaluate your answer:

Position ID: 7zcaAADWdgDgBg   Match ID: UQmgABAAAAAA

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Cube 113 - Backgame redouble to match point?
« on: February 07, 2008, 01:40:18 PM »

Offline Hardy_whv

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Re: Cube 113 - Backgame redouble to match point?
« Reply #1 on: February 09, 2008, 11:14:09 AM »
Very good and insightful situation here  :applaus:

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« Last Edit: February 09, 2008, 01:48:07 PM by sixty_something »
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Re: Cube 113 - Backgame redouble to match point?
« Reply #1 on: February 09, 2008, 11:14:09 AM »

Offline blitzxz

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Re: Cube 113 - Backgame redouble to match point?
« Reply #2 on: February 11, 2008, 12:37:48 PM »
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Offline Tomawaky

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Re: Cube 113 - Backgame redouble to match point?
« Reply #3 on: February 11, 2008, 09:20:33 PM »
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Re: Cube 113 - Backgame redouble to match point?
« Reply #3 on: February 11, 2008, 09:20:33 PM »

Offline dorbel

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Re: Cube 113 - Backgame redouble to match point?
« Reply #4 on: February 12, 2008, 09:30:46 PM »
You cant evaluate this position without knowing the score. What is it please?

Offline socksey

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Re: Cube 113 - Backgame redouble to match point?
« Reply #5 on: February 12, 2008, 10:17:20 PM »
Quote
Trailing 0-1 in a 5 point

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Offline dorbel

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Re: Cube 113 - Backgame redouble to match point?
« Reply #6 on: February 13, 2008, 08:11:44 AM »
Thanks, for some reason, I only saw the letters, not the poll bit.
This is a very nice position and highlights a redouble opportunity that often occurs at this score. Note that for money, a redouble here would be absurd and Red would have a correct beaver.
At this score however, a redouble and take has several interesting effects. On these figures, first, the 26% of the games that end in a gammon for Red are now worth only as much as a plain win. Second, White's gammons (10% of the games) now win the match for him and third, his plain wins get him to the Crawford game, always a valuable point to reach first.
Fourth and not least, the cube goes dead, so Red gains nothing from owning it. In a money game she would only have to get into the 75-80% wins range and she could win with the cube, but here, she has to get to 100% to score the points.
Note that if White misses here, he very often gets second helpings and occasionally a third try. If he hits, Red can also enter awkwardly (1-5 or 1-4 for example and expose another checker.
Nice redouble, easy take. You will note that above I said "on these figures". This is because a rollout shows that Red wins 35 useless gammons, rather than the 27% of the 2-ply evaluation. This doesn't alter the correct cube action for either side though.
« Last Edit: February 13, 2008, 12:43:45 PM by dorbel »

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