[Loughla]

Correct. That but for 1000. You can build your own with any number of online tools.

I don't have a link because it's part of a lesson plan set behind a payment on teachers pay teachers.

[int_19h]

Do you have a link to any of those online tools that can be used to generate a puzzle of equivalent complexity to the one that you've tested on?

[janalsncm]

The sum doesn’t even have to be 1000, just create a grid of random numbers, create a random path and find the sum. It’s an equivalent problem.