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Y Y L No Erratum Here 1
This page contains a discussion on problem 15 in Yang Yilun's ingenious life and death puzzles, Volume 1. I thought it contained an error, but Leon Matoh gently pointed out my mistake. On page 31, solution diagram 15 mentions:
"If Black 1 at 5, White (2 at) 6 is sente. Next, White can play 3 to live."
If White 2 Black 3 ...
White 4 is a mistake : Black 5 makes miai of A and B to kill.
If White atari at 4, Black 5 reverts to the original solution diagram.
This sequence makes miai of A and B. Leon Matoh 5d points out:
If Black prevents White from making a second eye at 9, then White 10 makes miai of A and B, capturing some stones and live.
This is a copy of the living page "Y Y L No Erratum Here 1" at Sensei's Library. (C) the Authors, published under the OpenContent License V1.0. |