Ospreys on the Hunt
(Published today, 00:00 by FIT7Y)
Rules:
Place the digits 1-9 once each into every row, column, and box.
Waves cells are the only cells that start with water. Water flows downhill from cells with water to all orthogonally adjacent cells with smaller digits. Water keeps flowing until no water cell has a smaller adjacent non-water cell.
Water never flows into cells on the edge of the grid.
Orthogonally adjacent water cells are part of the same lake. Different lakes cannot be adjacent, not even diagonally. Each lake covers a different number of cells. A digit N on a waves cell indicates that its lake covers N-1 cells.
A fish swims between two water cells that contain consecutive digits. Each fish is in a different lake.
A bird flies over two non-water cells that contain digits with the same (even/odd) parity.
Have fun solving!
Solution code: Row 6
Comments
today, 04:19 by gdc
Very fun! and also quite hard.
I'll assume you saw my series based on the way the rules are written. I think you did a great job adapting the ruleset with the given water-sources and the additional restrictions on how it may/may not spread. the analogy of water flowing downwards is also very intuitive.
today, 01:52 by zeniko
Quite a challenging puzzle with some tricky steps in the mid-solve. Reminded me of gdc‘s Norma L. Dokes puzzles but with a more serene theme. Thanks for sharing.
