Igo Hatsuyo-ron Problem 38 / Attempts

jvt: I don't agree with the solution (Black kills) found in a Chinese book.

[Diagram]

Diag. 1

jvt: I believe there is a way to get a ko with W8. The book FaYangLun, New Solutions by Cheng Xiaoliu does not cover W8. Instead variations for move W8 at a or b are both shown to fail, the White corner dies.

[Diagram]

Diag. 2: follow up from diag. 1

jvt: Can you improve on that result?

[Diagram]

Diag. 3: another continuation from diag. 1

tderz: B1 here looks good. If white a, then Black b and ....

[Diagram]

Diag. 4a: continuation from diag. 3

tderz: ... White seems to live anyway!

[Diagram]

Diag. 4b: continuation from diag. 3

tderz: ... White seems to live anyway!

[Diagram]

Diag. 4c: continuation from diag. 3

tderz: In the last diagram, Black suffered from a damezumari on black+circle (= former B1 in dia. 3).
Changing the order of moves? should do the trick!
If White now plays a, Black can get to (wrong by Black) dia. 5 by transposition. If White b, Black c, Wa, Bd e-f could follow -> dead.
jvt: Not dead, Wa is wrong, Wf instead makes life. See diag 4e.

[Diagram]

Diag. 5: another continuation from diag. 3

tderz: if White answers on the 1st line with W2 ...

[Diagram]

Diag. 6: continuation from diag. 5

tderz: White dies in this variant.

[Diagram]

Diag. 4d: continuation from diag. 3

unkx80: I think W2 can save something. But I don't have anything constructive for now...

[Diagram]

Diag. 4d: continuation from diag. 1

jvt: Yes as in this permutation W2 makes life in the corner. Or White can capture and live as in diag. 4e:

[Diagram]

Diag. 4e: continuation from diag. 1

jvt: White lives by playing in the corner!


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