Ugh. Starts off logical, but at the end there is no way to do this other than mass guessing and use of temporaries. Some parts of it can be guessed from context, but others are completely inscrutable and you just have to try every possible combination of squares. Don't waste your time. (The dutch translates to "Find the good way" -- no help there)

I couldn't finish this one. I tried "temp" mode but there are way too many single squares and it's too hard to complete (at least for me!)

Please try your puzzle before posting it.

Yeah, I've done it, but it was really difficult to solve. But with a lot of guessing and thinking a bit symmetrical, it is quite possible :)

Managed to get it by using Stepahnie's hint. Don't think I could have finished without it. Interesting figure.

Had to use temp moden adn has multiple solutions.

Spoiler: Each single dot is connected to somewhere diagonally.

Thanks.

9 point diagonal from the upper left corner, 5 point diagonal from the upper right corner (then bounce back until you hit the 11), 12 point diagonal from r1c15, 6 pt diag from r9c13 to the 5 in c8.