The New Sudoku Players' Forum

[enxio27]

Have any of you found any correlation between the stated difficulty ratings of the puzzles on the Menneske site with the actual techniques required? I'm trying to gather a couple dozen puzzles that require N/H singles, pairs, triplets, and quads, locked candidates (intersections), and x-wings, but nothing much harder than that. A friend was remarking today that he can no longer find any books containing puzzles that are challenging for him. As I understand it, x-wing is about the most difficult technique required for print-published puzzles (and the vast majority aren't even as advanced as that).