Gokyo Shumyo, Section 1, Problem 63 / Solution

[Diagram]

Main line

W1 is essential to prevent Black from creating a bulky five inside White's eye space.

[Diagram]

Continuation

[Diagram]

Continuation

[Diagram]

Variation

If black plays B2, W3 from behind is important...

[Diagram]

White falls into the trap

W3 is a serious mistake. B6 captures at B2, W7 recaptures at W5, B8 at W1 makes the bulky five shape. White is dead.


[Diagram]

Another Solution?

ProtoDeuteric: I can't see why W1 in this diagram would not work. I think that the above statement that B2 can now make white's eye a bulky five is short sighted...

[Diagram]

Continuation, W1 at "a"

ProtoDeuteric: With this sequence (which I believe is not katteyomi), white is alive and well.

LukeNine45: What about B4 at W5?

[Diagram]

If B4 at W5 (B2 at "a")

ProtoDeuteric: If B4 of the previous diagram was instead played where W5 was, then...well...looks like...no...wait...no...I guess you are right. In this variation of what has turned out to be a failed attempt, I misread where black would have played after W5.


[Diagram]

Failure

If White thinks to solve her problems by connecting, Black forces with B2, next creates the bulky five. B6 is also important. Let's go into 2 and 6.

[Diagram]

Var at 2 in failure diagram

Making the bulky five immediately works too but requires a tesuji at B4.

[Diagram]

Mistake at 6 in failure diagram

It would be a grave mistake to play B6 not at a. White captures at W7 ...

[Diagram]

Mistake at 6 in failure diagram

White has a and b as miai to assure life.


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