This puzzle I created for 10th 24 hour Championship. This puzzle type also appeared in the following championships
US Puzzle Championship 2009
Rules of Kuromasu Logic Puzzle
Add black squares to the grid (only in the empty spaces) so that each number equals the count of white squares that are directly in line (horizontally and vertically) with that number's square, including the numbered square itself. Black squares cannot share an edge, and all remaining white squares must be connected orthogonally.
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| Kuromasu-K4 |
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