#A3: No Three

 A rather ironic name for today's puzzle. The only puzzle of this type I've seen prior to today was the example included in the puzz.link rules page. It's an interesting genre in terms of its specialty rules, but it's difficult to incentivize shading squares. (In fact, for a unique 10x10 puzzle, every shaded square must overlap a circle.)

https://puzz.link/p?nothree/7/7/vaeiexea6el662e2eveiaeo

https://puzz.link/p?nothree/7/7/u224ezet2ex42el22ew222em

https://puzz.link/p?nothree/12/3/gaelemeieewehek6e

https://puzz.link/p?nothree/12/12/k26ejec224eveeseo6ceeqe6exaeenezl282eiezgeheoeh6emcaezieger6cemejelehehe22ee