Sudoku fans out there … #972 from the book
This one took me a while - but I finally cracked it. cell 5|1 was my breaking point. http://www.puzl.be/en/index.html?ps=112-121-238-241-257-295-335-386-393-418-422-484-537-552-573-629-685-691-715-728-776-817-856-861-879-981-998