Hello everyone,

I am looking for a collection of sudokus with different numbers of givens. I am doing some tests related to performance and I need [25-100] sudokus with 17 givens, with 18 givens, with 19 givens... up to 50 (or whatever upper limit I can get) etc. Grid ratings are not important as I am trying to measure a correlation based on number of givens versus solving time. Algorithms used to solve the sudokus as well as different types of symmetries (or no symmetry at all) are not important. As I said, only the number of givens is important to me. Anyone can point me to such a collection ? In the worst case, any idea on how to generate such a collection ? Thank you!