10000-year Ko

All you need to know about Carpenter's Square - 26


Diagram 26.1: White to play

All you need to know about Carpenter's Square - 25


Diagram 25.1: White to play

All you need to know about Carpenter's Square - 10


Diagram 10.1: White to play

Black has no external liberties but hanes at both sides. Can white do anything?

All you need to know about Carpenter's Square - 9


Diagram 9.1: White to play

We will now consider the Carpenter's corner with one extra liberty as well as one first-line stone.

All you need to know about Carpenter's Square - 7


Diagram 7.1: White to play

Black has one extra stone at *bs*. Does it help?

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