I’d appreciate some on topic answers this time? It’s also called hex sudoku. But they’re generally called super challengers in the puzzle books and they also have 32 circles going through both center diagonals that cannot contain the same number in either diagonal. I would appreciate it if the program mentioned contains said making capabilities (I just can’t get enough of super challenger sudoku!). If you don’t know of any programs, at least list a site that has pre made 16 x 16 sudoku puzzles like in the puzzle magazines. I’d really appreciate a decent answer this time, and I’m sure I’m not the only one that likes them!