(Referenced by 501)

This chapter shows, in detail, the main sequences which lead to the refutation of the solution of Fujisawa Hideyuki. They include the oki, rediscovered by Joachim Meinhardt. Please note that the content of this chapter should be understood in the historical context. This means that we knew of the "early" Hanezeki Exchange (which has been already included in the goproblems.com version, 760), but were very unsure about Black's "missing" stone ( 778) and the second throw-in ( 788).
Our refutation of the solution of Fujisawa Hideyuki ( 754) includes a line of play that was studied, in detail, by professionals. However, no-one found a use for it at the decisive moment. In this chapter we also examine various aspects of the decisive oki, which we think could have been responsible for the effect described above.
Joachim's oki has been the relevant starting point of our research. In itself, it is an extremely important move. But now, unfortunately, in the light of all the other moves and variations that we found, it has taken the back seat within our book, as far as the extent of its presentation is concerned. Nevertheless, its value cannot be overestimated.
All sequences in this chapter have been confirmed by professionals.