Two new sudoku variants at the World Championship
Try these example puzzles here! First Seen Odd/Even Sudoku rules. Odd clues outside the grid indicate the first odd digit from that direction. Even clues indicate the first even digit from that direction: https://cracking-the-cryptic.web.app/sudoku/pFF6RtJqTh
Magic Square Sudoku rules: Three of the given 3×3 blocks form a magic square, which means that the sum of both diagonals, the three horizontal lines of three cells and the three vertical lines of three cells is the same: https://cracking-the-cryptic.web.app/sudoku/2HdB6N7D8D
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▶SOFTWARE◀
We sometimes use Duncan's Sudoku Solver, which is available at http://www.littlegogs.com/index.shtml
Or our own software, which you can access by clicking on the links under the video.
▶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