Try entering the picture in the Triddler Workshop, don't forget to click Trim and to click Validate, and you can easily prove: Without that spot in the border the puzzle would be solvable as well with a difficulty of 11598

Try entering the picture in the Triddler Workshop, don't forget to click Trim and to click Validate, and you can easily prove: Without that spot in the border the puzzle would be solvable as well with a difficulty of 11598 :)

lovely

lovely

It's not a mistake. It must have be added to make the picture solveable.

It's not a mistake. It must have be added to make the picture solveable.

Nice one. (That's the fourth one of yours that I've done now that has that mistake on the left side of the border. I'm beginning to think it's deliberate.)

Nice one. (That's the fourth one of yours that I've done now that has that mistake on the left side of the border. I'm beginning to think it's deliberate.)