Ingenious life and death puzzles / Errata

This page contains discussions on errors in problems in Yang Yilun's Ingenious life and death puzzles.

At first there is a large discussion on problem 15 in Volume 1. Dieter Verhofstadt thought it contained an error, but Leon Matoh? gently pointed out his mistake.

On page 31, solution diagram 15 mentions:

Solution diagram 15  

"If at , at is sente. Next, White can play to live."

Diagram 1  

If , ...

Diagram 2  

is a mistake : makes miai of a and b to kill.

Diagram 3  

If White plays atari at , reverts to the original solution diagram.

Diagram 4  

This sequence makes miai of a and b.

--Dieter Verhofstadt

Leon Matoh 5d points out:

Diagram 5  

If Black prevents White from making a second eye at , then makes miai of a and b, capturing some stones and living.

Thomas Kahle from Leipzig has found another error in Mr. Yilun's puzzles: check out http://leipzig-go.de/sgf/zwei.sgf for his Number Games No. 2.

(added by Andre Ay)