Nando: OK, I gave it a try (for my double-digit kyu strength, this Kanazawa series is quite tough and so, highly interesting). It seems to me that Black 1 does the job (well, this only means that I haven't been successful in finding a killing attack for White...)
For instance, Black 3 makes miai of a and b for life.
Here, White 4 can't escape. (By the way, is this an example of oiotoshi?)
Or did I miss something ? (as usual ;p)