Xuanxuan Qijing Problem 2 / Solution

[Diagram]

Solution

The clamp of W1 is the solution. The strongest resistance black can try is a; b creates too many cutting points, while c allows white to live in the corner.

[Diagram]

Resistance 1: Connection

After black connects, white connects under with W2 and lives through a complicated running fight. Although black can try A or B, neither will kill white.

[Diagram]

Resistance 2: Tiger's mouth.

After W6 at black+circle, white can live with a or escape with b.

[Diagram]

Resistance 3: Descent

Black descends.

[Diagram]

Next white threatens to capture the marked black stones. If Black reduces White to one eye with B13, then after W14, Black can't escape.

[Diagram]

If Black plays this choice of B13 (or Black a-White b-Black c) to rescue the stones below, then W14 makes miai of capturing the two marked stones or playing d to make two eyes.

[Diagram]

Descent follow-up (W6 error)

Note that the order of moves is important. If white play W6 like this...

[Diagram]

Descent follow-up (continued)

This variation fails because white is short on liberties, so white's exchange of white+circle for black+circle in the previous diagram is premature.


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