jhubert: Atari is not good as on N5, you can play on S1 :( but may be you can play also P5 and N5 but it is less stylish
posetcay: Atari is as good as playing N5 directly if you play it with right timing (after exchanging R1-N1), otherwise opponent can play N1 at S1, was that what you meant? I added N5 directly as an option by the way.
Sadaharu: Many interchangeable sequences missing.
W can just play at N5 instead of atari at Q4 too.
posetcay: I missed that it was possible to N5 directly without atari, but can you provide other missing sequences? I omitted some of the variations that work but were suboptimal or unintuitive like Q4-R6-P5-O5-N5 or D10 at D11 because the solution tree was too long and I had to shorten it.
The option of N5 only after all the squeezes at the corner is still missing