The row sum and column sum need to match. Completely filling the ? rows makes the row sum 46. The column sum needs to stay at 46 so the ? columns need to have 0 walls.
>>716515002It's basic algebra+common sense
>>716517058So, was it more than 20 hours?
>>716518319More like 50. Shit's hard.
I love picross, but I don't like murder my toe sis
>>71651831910 hours in and I only finished 3rd row. I'm very bad at puzzle games.