Portico, is just worse HK, it's proposed after HK, shouldn't be a method imo
SpeedSolving Puzzles Community
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proof, Portico after DB is just Dougli Block, the last layer, COLL + EP5 is variant that is proposed along with the original proposal, which predates Portico.
MichaelZRC
I'll give you that Portico is a sort of HK Variant, but HK is a ZZ variant making Portico and HK ZZ variants.
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then Portico along with the other many HK variants are HK variants which in turn is a ZZ variant., so Portico and others is a sub variant, IMO