I am quite sure, that the tewari offered on the page isn't correct. But I am not so sure about the main part of it, whether connecting or hane on the second line. I've seen competent comment on it together with the pincer stone in the variations i gave - and tried to apply that to the situation without the pincer to my best abilities. (Which still are rather limited.)

I reckon the basic idea was to give examples where one has to play from knowledge / analysis and not by instinct because the instinct makes everything worse.