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The XY Ring: A Classic Sudoku Technique

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Cracking The Cryptic

Cracking The Cryptic

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Today's sudoku was created for a Discord speed-setting competition y Sam Cappleman-Lynes. It's called Delirium on the basis that Sam was almost in a a trance state when he made it due to lack of sleep! Please have a go at it at the link below:
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Rules:
Normal sudoku rules apply.
SPOILER: There is some detail on the technique Simon uses in the video at the very bottom of this video description!
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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.
Thank you for watching!
Simon and Mark
SPOILER: As the title of the video notes, the technique is called an XY-Ring. It shares some logic with techniques like an XY-Chain and a Continuous Nice Loop. We can cover these in other videos if there is interest.

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