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When gammon doesn't matter When gammon doesn't matter

04-09-2009 , 07:21 AM


Black to play up 4 to 2 in match to 7.

Playing 4/off leaves 20/36 for red to hit.
Playing 3/off, 3/2* leaves 15/36 for red to hit.

Gnubg calculates black is over 4% more likely to win the match by playing to allow the most immediate hits. So I'm thinking there must be something about being stacked on the three point here which significantly reduces the chances of not only leaving a second shot if missed initially, but also a second blot. This would never have occurred to me before seeing just how bad my 3/off, 3/2* move really was. How do you recognize situations in the heat of the battle where you're better off playing against the immediate odds?
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05-12-2009 , 11:50 PM
Bumped because I'm still not understanding how to recognize these situations.
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05-13-2009 , 12:10 AM
Quote:
Originally Posted by cashedout


Black to play up 4 to 2 in match to 7.

Playing 4/off leaves 20/36 for red to hit.
Playing 3/off, 3/2* leaves 15/36 for red to hit.

Gnubg calculates black is over 4% more likely to win the match by playing to allow the most immediate hits. So I'm thinking there must be something about being stacked on the three point here which significantly reduces the chances of not only leaving a second shot if missed initially, but also a second blot. This would never have occurred to me before seeing just how bad my 3/off, 3/2* move really was. How do you recognize situations in the heat of the battle where you're better off playing against the immediate odds?
I think the main thing here is that if you hit with 3/2*, you might not cover it so that you've got a long term liability in that blot. Playing 4/off will leave a blot for one roll, but you'll clean it up with the next roll.
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05-13-2009 , 01:58 AM
Quote:
Originally Posted by Aaron W.
I think the main thing here is that if you hit with 3/2*, you might not cover it so that you've got a long term liability in that blot. Playing 4/off will leave a blot for one roll, but you'll clean it up with the next roll.
That makes sense. I needed to look at the high percentage of rolls that leave the blot again if red misses the first opportunity. Thanks.
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05-13-2009 , 09:18 AM
Just imagine what happens if you get missed on the first roll.

After 4/off and a miss, any two big numbers and all aces play safe. You blot only with your deuces, where you'll play 4/2* and 3/off, leaving another single blot.

After 3/off 3/2*, your aces all blot somewhere, 4-2, 5-2, and 6-2 are safe, 3-2 blots. Two big numbers leave the blot on the 2-point. Best of all (in a sick way) are 6-3, 5-3, and 4-3, which leave three (!) blots.

Get in the habit of mentally checking how the non-doubles play on the next turn, and you'll avoid these sorts of oversights.
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05-16-2009 , 09:44 AM
I suppose then that recubing to 8 before this roll wasn't an option?
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05-16-2009 , 10:36 AM
Quote:
Originally Posted by Chipslinger
I suppose then that recubing to 8 before this roll wasn't an option?
True, it was not.

The majority of your wins from this position are gammons, which win the match. (Score is 4-2 to 7, your lead, and you own a 2-cube.) So you just roll on and see if you win a gammon. If you do double, your opponent takes and reships to 8, and now this game decides the match and gammons don't count anymore.
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05-16-2009 , 10:40 AM
Cube was at 4, so there would be no need to reship. But it was my mistake not to pay attention to the match score anyway...
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