The Dutch Master Again

Richard Stolk's excellent sudoku series continues.
Try 'Different Differences' here: https://cracking-the-cryptic.web.app/sudoku/ftHB9mP9PP
Normal sudoku rules apply. Also, each 3x3 box uses a different number (1-9); dots show ALL the differences of that number in the box.

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▶ABOUT US◀
Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships. We're also "cryptic crossword" aficionados. Mark is the twelve-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.

Видео The Dutch Master Again канала Cracking The Cryptic