#A41: Chained Block, Archipelago, Aquapelago

 I can see why Chained Block and Archipelago would be grouped together: the main difference is that Chained Block's shaded regions require a number and Archipelago requires the 1-to-n regions. In this way, I think Chained Block is easier to set/solve and makes a decent warmup for the latter. Aquapelago, on the other hand, appears to bear few similarities to either: shaded squares still count the number of shaded squares in a region, but it's gone diagonal. In this way, Aquapelago is actually closer to Chained Block than Archipelago.

https://puzz.link/p?chainedb/7/6/1g2n6x1n2g4

https://puzz.link/p?chainedb/12/12/1g-10h1j1h2j2j2w-10x1j1j1h2j2j2zv1j1m2j2j8

https://puzz.link/p?chainedb/12/16/lbj41r2g1r6g2k4l.g2r4i1r2h5g1r6u1r2g1l4k6g2r.g2r48j4l

https://pzprxs.vercel.app/p?archipelago/6/6/i2g.g1h.i..h6g.h.g.h.g.h.g./

https://pzprxs.vercel.app/p?archipelago/4/3/.g.j.h.g

https://pzprxs.vercel.app/p?archipelago/11/6/k2h.g.1k.k2m.m2k1k4k6l../

https://puzz.link/p?aquapelago/11/11/k.j.zh.g1g2x1m6x2g4g.zh6j.k

(Fun fact: if the bottom-left square in the previous puzzle was kept unclued, it could be presented as a variant puzzle in which the unclued squares contain the same set of numbers as the clued squares.)

I did intend to make two more Aquapelago puzzles, but I started feeling light-headed. I think a portion of it is caused by stress over my vision for #A50, which I've yet to start cluing, so I might not get around to finishing that. Then again, I said something similar last year!