1] It is "10". Gaurav had already corrected it, but not in his first post.

2] Not necessarily in the same order. Both regions just need to contain the same set of numbers.

Edited by Ours brun 2010-03-08 4:39 PM

Check Diagonally Nonconsecutive Sudoku at http://janoslaw.blogspot.com/2010/05/diagonally-nonconsecutive.html