Did you solve it? Sandwich sudoku - a new puzzle goes viral
by Alex Bellos from on (#4EJPV)
The solutions to today's puzzles
Earlier today I set you three sandwich sudoku puzzles. It's a new variant of Sudoku that is getting lots of attention. To get a printable page of the problems click this link.
If you got stuck with the last one, which was very hard, this video reveals how to solve it.
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