I guess the problem is the combination of big eye and capturing race.
There’s probably various extremes. The small cases 5,6 and below there are killable shapes with nakade so one should be able to cook up capturing races that are close for those.
Around 7 or so, a lot of the eyespaces turn into seki or outright life if you try to fill in from the inside. So in a lot of instances if it’s a proper capturing race, one side will just be alive and the other dead, or if it’s kind of symmetric and both are alive then it’s not really a capturing race.
There’s still a few special shapes and cases, but I’m not sure they strictly involve something similar like a nakade.
Go is always full of surprises though.
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