On this page we devise a coding system for notchers, in order to set up a systematic approach to their life and death status.
Suppose the notcher is black and the surrounding group white.
Marked points: possible weaknesses
Circled stones: legs
Squared stones: notch
We put this information into a code nklxx where n, k, l take numerical values and the x-es can be either W, N or S.
Several months after having devised this system, I see one problem.
It sometimes matters whether all outside liberties are filled. The corners are hence not the only potential weakness. Therefore, the classification is not complete and maybe not relevant at all. For the moment, I intend to continue as we started but with special mention of liberties.