• Match to 7 White (3) vs. Red (1)
Position posted by Chuck Bower [121703]
Pip counts: White: 139, Red: 131
• Red to play 
• Equities 3-ply, cubeful [grandmaster/Jacob & Trice Met]
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22/20 6/2* |
+0.180 |
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53.0% 12.1% 0.3% 47.0% 9.2% 0.2% |
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20/14 |
+0.105 ( -0.075) |
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51.6% 11.3% 0.3% 48.4% 10.4% 0.2% |
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22/20 7/3 |
+0.096 ( -0.084) |
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50.9% 10.8% 0.2% 49.1% 8.3% 0.1% |
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20/16 7/5 |
+0.035 ( -0.145) |
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49.4% 11.7% 0.3% 50.6% 11.4% 0.2% |
20/14 gets a back man moving, which is the proper theme when leading in the race, but I don't like what it does to the position.
That checker is unlikely to be covered and so Red will either have to play it forward or risk leaving it there for several turns.
If it's played forward, Red's back men become totally cut off from the rest of his men.
If the checker is left in the outfield, there is the continuing danger of it getting hit on each turn.
Meanwhile, the problem of Red's checkers on the 22-point remains.
I think the important part of the this play, therefore, is to play 22/20 with the 2.
This also works on the theme of getting the back men around the board, but it does so in a more long-sighted way.
The more advanced anchor will be easier to manage, and the rear checkers have a better chance of helping each other out.
I think Red then needs to hit with the 4 just because the alternatives simply aren't productive, and because with the defensive 5-point, the risk of being hit is acceptable.
-- Dean Gay
If your going to hit with the 4, 22/20 is a much better 2 to play since you have plenty of chances to cover the 2-point next roll anyhow and you don't really want to give up the bar-point for the 2-point when the opponent is anchored on the 4-point anyhow.
So, after hitting, playing 22/20 gets the much better anchor and should be superior than 7/5.
-- Neil Kazaross
Red wants to fight for outfield control and make the 20-point.
If White leaps with the checker on the 23-point with a 6 before Red does, White will be in solid control of the outfield when Red's timing is bad.
I think hitting on the 2-point actually addresses the outfield control issue.
Red can keep the initiative with the hit.
Red is ahead in the race, so he is going to have to run first.
This falls into White's trap if White has outfield control.
-- Tad Bright
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• Match to 7 White (5) vs. Red (4)
Position posted by Douglas Zare [121803]
Pip counts: White: 115, Red: 140
• Red to play 
• Equities 3-ply, cubeful [grandmaster/Jacob & Trice Met]
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23/21* 5/4*(2) |
+0.565 |
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56.4% 22.1% 0.7% 43.6% 15.1% 0.6% |
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23/22 6/4*/3 |
+0.483 ( -0.083) |
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55.7% 19.7% 0.7% 44.3% 17.4% 0.7% |
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23/21* 5/4*/3 |
+0.483 ( -0.083) |
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54.6% 21.6% 0.7% 45.4% 16.2% 0.7% |
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23/21* 6/4* |
+0.440 ( -0.125) |
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55.9% 20.1% 0.7% 44.1% 17.8% 1.1% |
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23/21*(2) |
+0.437 ( -0.129) |
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55.2% 15.6% 0.4% 44.8% 11.1% 0.3% |
I prefer the brute force play of hitting on both 4-points but I only leave one return shot. 23/21* 5/4(2) get the nod here.
This play is extremely complicated since there are many viable alternatives and future cube use (Red can be agressive with it) must be considered very carefully.
I'll make the impure play and to leave fewer return shots and hope to improve it later (perhaps after cubing).
The score may affect the play due to cube use next turn which is different if this were a money play problem.
I wouldn't cube next turn if both White's checkers enter without hitting (especially 5-1 and 5-2).
The effects of this score can really alter what one would think is normal cube strategy.
-- Neil Kazaross
Rollouts indicate that 5/4*(2) 23/21* is right by more than 0.100 EMG over 23/21*(2), which is tied with a couple of other plays for second.
After Red hits two, White must hit or enter with doubles to avoid the cube, though White seems to have an easy take after entering two checkers with nondoubles, and a pass otherwise.
If White dances with both checkers, Red can play on for the gammon, but entering with one checker means Red should cash.
-- Douglas Zare
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