# Gokyo Shumyo, Section 1, Problem 36 / Solution

Black lives

makes miai of a and b. At the same time, it protects against a clamp at c by setting up an ambush. The shape here also occurs in problems 18 and 34.

Main line

White makes a attachment at , but Black calmly takes the miai point at . White seemingly connects underneath, but Black has the throw in tesuji at . White captures, next ..

Main line (continuation)

White is in shortage of liberties. Look how helps.

Wrong (1)

If here, then White plays at , threatening to connect at a. If Black plays b to prevent this, then White can prevent a second eye to the right of b, and kill, with c or d

Wrong (2); White's mistake

Note that must not be played here! Then and lives, after sacrificing the two Black stones on the right. Of course, if makes the mistake of playing at to save the two stones, White plays the placement at and Black loses everything instead.

Wrong (3)

White can answer at or at a. After , white a and black b do not create a ko, as shown by the next diagram.

Wrong (4)

White can simply connect at . Black's group is dead.

Wrong (5)

Following on from diagram #3 above, to attempts to create a seki. However, is a tesuji that will kill Black.

Wrong (6)

and try to make a bent four.

Wrong (7)

But the placement at kills the entire black group. Note that if carelessly plays atari on the five black stones at a, Black lives at instead, with the under the stones technique.

KarlKnechtel: For completeness, note Black cannot live via under the stones by sacrificing six stones either:

Wrong (8)

White is forced to capture at (!) because otherwise Black captures at a and has two eyes.

Wrong (9)

Black tries to continue via standard under the stones technique, but ends up almost filled with a dead shape .

Gokyo Shumyo, Section 1, Problem 36 / Solution last edited by hnishy on January 17, 2023 - 05:12