Like this?That was easy as hell.
each row and column must have equal circles left.
o oo oo oo o o oSpoiler ^Like this?That was easy as hell.
I think that's incorrect. Column 2 and 3 only have 1 on the grid you show.
I found a way for it to work with eight taken away.o o o o o o o o
I had that.Then I realized it was eight. :(
It also works with 16 taken away:;D