Maybe it's just me but I just canNOT figure out this puzzle! I thought I was pretty darn good at doing these, but this one is just too difficult for me! I wish I could complete it though! I am sure it's a great puzzle! ~:(

A lot of guessing required, but once the pattern starts to make sense, it can be completed. SPOILER!

The first and last columns starting at the BOTTOM: column 1 is BBBBwBBBBBBBBBBwwwwwwwwww and column 25 is BBBBwBBBBBBBBBBBBBBBBwwww. Not sure how to give any more hints, but all the spirals join up with each other in some way, except for the bottom left, which doesn't form part of any other spiral although there are two squares that adjoin diagonally left to right. Hope this isn't too confusing! The bottom line is BwwwBBBBBBwwwBBBBBwwBBBBB. If you get those squares in, you should be able to do it.

Thanks for the help MSM!

Took me 96 minutes and had to use temp mode for a lot of trial & error, but got there in the end. Can I get triple points please? :-)

Used MSM's tip for the sides, and the rest seemed to flow logically :)

A lot of educated spiral guessing for this one, but I didn't look at the hints to figure it out.