Toshiro Kageyama in his book "Lessons in the Fundamentals of Go" presents us with some life-and-death problems. Here is one of them with mine and Kageyama's solutions. Does mine work?

Thanks.

White has a stronger move for 4, so your attempt fails.

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Sanity is for the weak.

Do you by any chance mean S19?

Thanks.

S19 Q18 P18

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Sanity is for the weak.

Here's how it plays out in full. B can slice off a few stones but W lives.

Txewì, you're wrong.

In your second sequence w6 lives, but loses points compared to p8.
And your claim that w is alive after the third sequence is plain wrong.

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I think Suprun's b1 ends in ko.

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Sanity is for the weak.

@Txewì: In you first sequence is gote (white can live without answering). Locally White connects with to save 3 stones but it is not needed.

don't be so hard on Txewì... the whole point is that SuprunP's "solution" doesn't work (for various reasons).