Our Hardest Sudoku And How To Solve It (Slowly!)

Описание к видео Our Hardest Sudoku And How To Solve It (Slowly!)

One of our "kind" viewers suggested we give this incredibly difficult Sudoku a try. Apologies for the length of the video but Simon's brain couldn't go any faster! Lots of advanced techniques required here including our old friend, the Swordfish.

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