How To Create A Sudoku Puzzle (aka Making A Sandwich!)

Mark shows us how he can create a sudoku. Solve it first here before you watch how it was made:

cracking-the-cryptic.web.app/sudoku/7469Nmn9r4

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▶SOFTWARE◀ We mainly use some specialist software we are developing, but sometimes we use Duncan's Sudoku Solver, which is available at littlegogs.com/index.shtml

▶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 eleven-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. Thank you for watching! Simon and Mark