A "Greater Than Sudoku" / relationship sudoku, Ontario, Canada

% Seaton Series Savage Sudoku #1

& Seaton Series Savage Sudoku #2

Canada, a relationship (ie greater than, less than, and equals) killer sudoku

Canada, a relationship (ie greater than & less than) killer sudoku

A "Greater Than Killer Sudoku", Ontario, Canada

Ontario, Canada. riokun's rating: Not too hard

Two monstrous killer sudokus!  Czech Republic

Queensland, Australia.  riokun's rating: Difficult!

A (worldwide) list of Killer Sudoku puzzles that I have come across on geocaching.com 