A certain 3-3 invasion sequence on OGS Joseki

On https://online-go.com/joseki/63, [4] should be called [D] and given an explanation.

A few moves down the line, at https://online-go.com/joseki/55562, there doesn’t appear to be any meaningful difference between moves [1] and [2], which look like different move orders that coalesce into the same result.

Also, a pedantic point: surely the asterisk citation * should come before the double asterisk ** in the text.
Really, I think the proper convention is for the second citation to be represented by the dagger † and the third one by the diesis (double dagger) ‡

Wikipedia has more to say on the matter, actually, if I can derail my own thread:

Additional footnotes [after the asterisk, dagger, and diesis] are somewhat inconsistent and represented by a variety of symbols, e.g.

  • parallels ‖
  • the section sign §
  • and the pilcrow

… superscript numerals have increasingly been used in modern literature in the place of these symbols