Done by successively eliminating possible values from a cell with five greens, succeeded on 4th attempt.

g,ng

Had to resort to greens for this little hard one.

done

ah, the dreaded "hard" puzzle.

whew...finally resorted to greens and 2 guesses

start

pause

a bunch of pairs and two unique rectangles solve it

G, NG. Finding all the hidden pairs is the tricky part. After that, using the unique rectangles isn't necessary, although it may speed up the process a bit. (Strictly speaking, URs are considered by some to be an invalid technique.)

done

Happy International Women

's Day (the enter key wanted to get into the action :) )

Did it, no greens, no guesses, and even no unique rectangles. Nothing more complicated than pairs used in solving this. 18.

Janetb50 - I know that guessing is considered invalid, but I have never read/heard where URs are invalid. They are just an extension of pairs - why would they be invalid?

done

KT, the controversy over the UR technique is explained here:
https://tinyurl.com/y2ff8x54