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Offline Gomoto
 Post subject: Nice problem
Post #1 Posted: Fri Aug 24, 2018 10:14 am 
Gosei

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White to play

Attachment:
problemlevel.jpg
problemlevel.jpg [ 217.07 KiB | Viewed 3803 times ]


Level 1 (easy)

What is whites best play?

hint:
(White has won this game already but lets suppose he wants to win with > 150 points)



Level 2 (difficult)

How does black defend?


Have fun!
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Offline EdLee
 Post subject:
Post #2 Posted: Fri Aug 24, 2018 11:43 am 
Honinbo
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Hi Gomoto,
Initial feeling is W drops at B12,
cap race, big eye v. small eye (with 0.5 ko).

For B to defend, do you mean after W drops B12,
or instead of B's current move A17 key point ?
Hmm, maybe the same spot, ladder at B12...

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Offline Gomoto
 Post subject: Re: Nice problem
Post #3 Posted: Fri Aug 24, 2018 12:05 pm 
Gosei

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@EdLee
(Solution Easy Problem)
After white B12, is it possible to defend as black? :)
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Offline HermanHiddema
 Post subject: Re: Nice problem
Post #4 Posted: Fri Aug 24, 2018 1:17 pm 
Gosei
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Black descends at B12 to create semedori. Black must immediately capture white's group in gote. So it gains a few points in sente for white, who can then go on to take the next biggest endgame at O1.

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Offline Bill Spight
 Post subject: Re: Nice problem
Post #5 Posted: Sat Aug 25, 2018 10:14 am 
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Best play depends upon the method of scoring. :)


_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.


Last edited by Bill Spight on Sat Aug 25, 2018 9:54 pm, edited 1 time in total.
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Offline Gomoto
 Post subject: Re: Nice problem
Post #6 Posted: Sat Aug 25, 2018 11:28 am 
Gosei

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Thank you Bill for your very detailed solutions.
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