Sorry for reviving this old thread, but I don’t get it.
In https://senseis.xmp.net/?McMahonPairing I find this: “Pair players within the bands according to one of the methods outlined in Group Pairing.”
When looking at https://online-go.com/tournament/29263 the slide pairing is seemingly applied across all players, not within one band. In how far is this still a MCMahon tournament? What am I missing???