Instructions:
Place digits 1-6 in the grid so that no digit is repeated within a row/column. Numbers in the diagram indicate the difference between the biggest and smallest digit in the visible cells. A digit can seen others until its view is blocked with a triangled cell. If there is only one cell in sight, the number indicates the digit itself. No cell may remain empty.
Solution of this puzzle can be found here
Check some more puzzles of this type "here"
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