Jeff Heldt

Challenging Brain Teasers For Adults: Kuroshiro Puzzles - The Best Puzzles Collection - Brain Teaser Puzzles Jeff Heldt

Kuroshiro ("Kuroshirorupu"; from Japanese, literally "black and white loop") is played on a grid with black and white circles in some cells. The goal is to draw a single continuous non-intersecting loop that properly passes through all circled cells. Between two successive circles of the same color the loop must not be turned. Between two successive circles of different colours the loop must turn exactly once.

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