Dropping back problem 1 / Solution

[Diagram]

White connects in sente

W1 forces B2 to save the corner (White can get a ko to kill it). Then White plays tenuki here.

[Diagram]

Dropping back

The point being that B1 and B3 are sente plays now, but don't break through, an example of dropping back. Nothing difficult, with white+circle in place; but you have to see it in a real game to feel the force of it.


[Diagram]

Going back to the start

Assuming this came about as a result of the play white+circle here, B1 is required. After B3, can White take still take sente?

[Diagram]

Going back to the start (continued)

This is much more profitable for Black (next Black a and White will have to take the black+circle stones); so that in practice White may not be able to take, should play reverse sente.


In the real game the white+circle play was a bit more like an endgame tesuji.

[Diagram]

Going right back to the start

The way the problem was set makes this white+circle/black+circle exchange first look better.

Charles Matthews


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(OC) 2016 the Authors, published under the OpenContent License V1.0.
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