Gokyo Shumyo, Section 1, Problem 45 / Discussion

I hadn't noticed this is the same problem, but indeed. In fact the OD1P - Aug 10 Problem is an improved version,

 Looking back to the book, I noticed that Hashimoto Utaro
 added the marked stone to the problem. He marked it too,
 implying that there is some comment about the stone.

The white stone at a prevents Black from running away, which would provide another solution.

I have had a brief mail exchange with Richard Hunter who possesses a copy of the Gokyo Shumyo with solutions and comments by Go Seigen. Go Seigen made several improvements to the previous versions, precisely preventing the running away options.

--DieterVerhofstadt

The "improved" version can be found on several Chinese websites. Ulrich Görtz has a web page for these classics, converted to SGF at [ext] http://www.g0ertz.de/uligo/classic.html.

In the Chinese version Qi Jing Zhong Miao problem 26 and 30 are completely different from your version. Who knows why?

--jvt

The funny thing is, I have this collection on disk. Download but never look at it: that's called greed.

Richard Hunter told me that he found a "decallation" (is this English?) (English would be a shift Charles) between my series and the Go Seigen version. He doesn't know why either.

--DieterVerhofstadt

"Decollation" maybe? The usage is a little different than my understanding though. DaveSigaty

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