Basic endgame problem -- feedback requested

Bill Spight · #1

Here is a 13x13 problem that will be simple to some people. My intended solver is around 10 kyu. I would be interested in what you think of the problem, and what level you think it is. Many thanks.

Click Here To Show Diagram Code: [go]$$W White to play. Japanese rules. 6.5 komi. $$ --------------------------- $$ | . . X O . . . O O . . . . | $$ | X . X O O O O . O . X X . | $$ | . X O . . . . O O O X O . | $$ | . X X X X . X . X O . X . | $$ | O O O O X . X . X X . X . | $$ | . . O X . X . X O X . X . | $$ | . . O X . X . X O X X X . | $$ | . O O . O X . X O . O X . | $$ | . X O O X X X O O X . X . | $$ | . O . O O X X . O X X X O | $$ | . . O . . . X O O O O X X | $$ | . . O O X X X O . O O X . | $$ | . . O . O O X O O . O . . | $$ ---------------------------[/go]

(Japanese rules, 6.5 komi.)

White to play and win. Show best play for both. (Several options are equivalent.)

Enjoy!

tj86430 · #2

It seems fairly easy, but I'm not sure until i see what the correct answer is :cool:

Probably just fine for 10k.

Bill Spight · #3

It's OK to solve it, too.

(But please hide your solution.

)

freegame · #4

I made attempt.
I did not really calculate the moves,
just (quickly) played out the game

will take a 10 kyu quite some time to solve correctly I think.

tj86430 · #5

freegame wrote:

I made attempt.
I did not really calculate the moves,
just (quickly) played out the game

So is the problem to find the next move for white or to play out the entire game? If the latter, then I think it's a big effort for 10k, although doable.

(If the former, then at least my move was the same as yours)

Bill Spight · #6

freegame wrote:

I made attempt.
I did not really calculate the moves,
just (quickly) played out the game

will take a 10 kyu quite some time to solve correctly I think.

Typo: You left out the White stone on K-02, which White needs to live.

illluck · #7

I think this is too hard for 10k. I cannot solve this with certainty XD

Bill Spight · #8

tj86430 wrote:

freegame wrote:

I made attempt.
I did not really calculate the moves,
just (quickly) played out the game

So is the problem to find the next move for white or to play out the entire game? If the latter, then I think it's a big effort for 10k, although doable.

(If the former, then at least my move was the same as yours)

Yes, the idea is to play out the rest of the game optimally for both sides. I have edited the problem to make that clear. Thanks.

jts · #9

In your diagram, freegame, :b2:

should definitely be at

...but only if :w1:

doesn't get there first.

freegame · **#10**

jts wrote:

In your diagram, freegame, :b2:

should definitely be at

...but only if :w1:

doesn't get there first.

I missed a white stone at k2 when coppying the dagra.
thanks for pointing that out. :tmbup:

(put a note in my previous post)

jts · **#11**

More seriously,

Mnemonic · **#12**

Well, I'm 10k so let’s see. (Warning: lot of useless text to sort my thoughts)

daal · **#13**

Bill Spight wrote:

My intended solver is around 10 kyu.

I'm really hoping this is a joke. :-?

I am pushing 5k and am 100% certain that I cannot solve this correctly (without first reading your book).

Loons · **#14**

Hey Mnemonic:

My solution and slight variations, for reference:

Edit:
For Bill:

mw42 · **#15**

I got a half-point win for white. I commented on the value of each of the moves. I thought it was pretty easy, but maybe I erred.

Phelan · **#16**

I thought it was too hard, and from the answers I saw, I even missed some critical points. I need to work on my endgame. :oops:

mw42 · **#17**

Phelan wrote:

I thought it was too hard, and from the answers I saw, I even missed some critical points. I need to work on my endgame. :oops:

Have a look at mine, I wrote down the point values. There's nothing "tricky" that I saw so it's pretty straight-forward "play-the-biggest-move" yose endgame (but there was something tricky that I didn't see :mrgreen:

).

Bill Spight · **#18**

mw42 wrote:

I got a half-point win for white. I commented on the value of each of the moves. I thought it was pretty easy, but maybe I erred.

mw42 · **#19**

Bill Spight wrote:

Thanks for having a look at my solution, but I must admit your comment baffles me. :-)

Loons · **#20**

I'm a little curious; ye fellow sdks who are saying "seems very hard" - could you go into more detail ? Which step(s) are ambiguous, for example. I know I find the e-1 affair a little niggle-y to consciously think about (a two point gote that makes a new two point gote if black plays it? Is that how you describe it?), but not really write-off material.

Bill; I added a small note for you in my previous post. Also, how hard do you find this sort of diagram/problem to create ?

a hint for mw42

Basic endgame problem -- feedback requested

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