This is the first puzzle of this type which I created for practice of Indian Puzzle Team participating in World Puzzle Championship 2009. I have created some more puzzles of this type, which I will be posting here later.
This Puzzle type appeared in the following championships
"18th World Puzzle Championship, Antalya (Turkey)"
Paint some cells black to form a single closed loop that does not touch itself even at a point. Numbers in painted cells indicate the number of unpainted cells in neighbouring squares. Numbers in unpainted cells indicate the number of painted cells in neighbouring squares.
Checkout more puzzles by clicking on the below image
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