This version imposes organization, adding and rewriting captions to conform to relatively brief standard. Please follow this pattern when adding your own variants.
Some sections may not be complete, for instance I suspect more instances/ideas of "Alternative rules of capture, suicide, repetition, and fairness" are hiding in the SL woodwork. There are also variants that do not have pages here, including several relatives of "The Flicky Game - one of probably many Korean? stone-sliding dexterity games"
This is an upgrade to the old page, but I have rewritten many of the original captions, so would be fine with maintaining it as a separate listing as well.
Here is what was completely omitted from the original page:
Button Go (not really a variant, just a refinement of area scoring) KlinGo undocumented/nonvariant Livejournal Go community article on multi dimensional Go deadlink Numeral Go deadlink Four Color deadlink one-player go incoherent / I don't get it