RTG Problem 63 / Discussion

Herman Hiddema: This problem is very difficult for me, because there are so many viable options. At first glance, all of the moves a-e seem like reasonable attempts. That makes the reading very wide.

Many variations end in ko or seki, though sometimes it is difficult to see how white can achieve it. Finding strongest play for both sides takes a lot of effort.

So when considering the moves a-e, each of them turns in to a new complicated problem where white has to try and live. And each of them has multiple possible answers

Table of contents Option a Option b Option c Option d Option e

Table of diagrams Black to play and kill white unconditionally Can white live after a? Can white live after b? Can white live after c? Can white live after d? Can white live after e?

Option a

White to try and live (or at least get ko or seki)

Option b

White to try and live (or at least get ko or seki)

Option c

White to try and live (or at least get ko or seki)

Option d

White to try and live (or at least get ko or seki)

Option e

White to try and live (or at least get ko or seki)