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Author/Opus: This is the 17th puzzle from our new contributing puzzlemaster JinHoo Ahn.
Rules: Variation of Cross the Streams rules. Instead of their usual meaning, clues refer to the distribution of the white cells. The shaded cells must still obey the regular rules (connectivity, no 2×2 squares).
Difficulty: 4 stars
Time Standards (highlight to view): Grandmaster = 6:30, Master = 10:30, Expert = 21:00