Retrograde Analysis Problem 6

  Difficulty: Advanced   Keywords: Joseki, Ko, Shape, Problem

Reuven I opened the game in this position after being away and noticed the 4-4 prisoners status and started wondering, where did the extra Black stone get captured...

[Diagram]

Won.S.J. 7dp vs Lee.Ch.H. 9dp

At move 83, Black ends the ko by capturing a stone at the marked location. There're 38 black stones and 37 white stones on the board (In other words, each has 4 prisoners). Where were these stones captured?

/Attempts
/Solution?


This is a copy of the living page "Retrograde Analysis Problem 6" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
[Welcome to Sensei's Library!]
StartingPoints
ReferenceSection
About