This one has no defined starting place that I can find. I started guessing based on the fact that it seemed like a pattern. I finally found a starting point by placing squares in row 1, columns 19 through 25 and then it came together nicely.

Opps - actually its only squares 20 through 25 for a total of 6 squares.

Thank you for the hint!!

Very hard starting but nice.

Only solved with Morgano's hint - thank you!

Logical without help!!

One unique solution. Can be solved with or without hints. Thank you for the puzzle.

Not difficult at all ??! 6's on the bottom row need 1's and there are only two.