All you need to know about Carpenter's Square-33
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Diagram 33.1: White to play

This is yet another 'incomplete' Carpenter's Square.


Diagram 33.2: Benchmark

We again use the standard Carpenter's Square as a benchmark. Can white can anything better than a direct ko?


Diagram 33.3: Variation

can also play this a very flexible shape to form a ko.


Diagram 33.4: Solution

then is the correct combination. After , 'a' and 'b' are miai points so the corner is dead.


Diagram 33.5: Variation

doesn't work either. After the corner is dead too due to short of eyespace.

Conclusion: this 'incomplete' Carpenter's Square can be killed. Diagram 33.4 is the only correct way.

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