PracticalEndgameTest6/Solution
![[Diagram]](../../diagrams/42/55bbb5c11d709685e522671e4aa4f046.png) | White to play and win |
and are miai, but White chooses to get the reverse sente at . Then Black takes his sente with - .
Failure 1: Wrong miai
Failure 2: Wrong reverse sente
Failure 3: Premature reverse sente
![[Diagram]](../../diagrams/42/e8e80ffcac7ffe816d60e7b09ac14913.png) | Stout resistance |
Next, - force White to keep pace with - . Otherwise Black can make jigo. But gets tedomari to win by one point.
![[Diagram]](../../diagrams/19/edd0800249ac5831882d02893cde0142.png) | Final miai |
Finally, the last four plays are all miai. The order of plays does not matter. White wins by 1.
WillerZ found the solution.
I concocted this for Dave, who wondered about "assessing reverse sente dynamically". I also wanted to show the difference between the initial miai, which made no difference in the previous problem.
-- Bill Spight
Failure 1
![[Diagram]](../../diagrams/12/c477816cb976a2ea0105152742ce597b.png) | Wrong miai |
If takes the wrong miai, Black takes his sente with - and then takes the other miai with . After the remaining four plays are miai. As with the Final miai diagram, the exact order of play does not matter. The result is jigo.
Failure 2
![[Diagram]](../../diagrams/0/d91d837fac48b0c9163d12fdbc472afc.png) | Wrong reverse sente |
At first it appears that White can play the reverse sente at instead of , but is a mistake.
![[Diagram]](../../diagrams/4/862e4d4e8c79432bd7ce6c556a17d2e0.png) | Wrong reverse sente (ii) |
After we have not reached a miai. Black continues with . Now - is sente because of and . After the last two plays are miai. The result is jigo.
is worth 1.5 points, not 1, so is sente. But after White replies at , is tedomari, and Black gets jigo.
Return
Failure 3
![[Diagram]](../../diagrams/27/6b2c6d77235ab930d1558b369000b465.png) | Premature reverse sente |
If White starts with the reverse sente at , Black takes the right miai (for him) with . After the position has transposed to the Wrong reverse sente diagram.
Note that each player prefers a different play in the initial miai.
This is a copy of the living page
"PracticalEndgameTest6/Solution" at
Sensei's Library.
2004 the Authors, published under the OpenContent License V1.0.
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