Here’s a toroidal nurikabe puzzle. Ditto the comment for toroidal masyu – strictly speaking, removing the boundaries of the puzzle actual lifts a restriction rather than imposes one. However, having to change your thinking to deal with identification spaces isn’t the easiest thing in the world to do if you aren’t used to it!
#013 Toroidal Nurikabe – rated easy
All puzzles © Tom Collyer 2009
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