Opposing Schools
(Published on 19. August 2025, 16:25 by vitaminz)
RULES:
Place the digits 1-7 or a fish in each cell such that no element repeats in a row, column, or box.
Fish: The sum of digits pointed at by the head of a fish equal the sum of the digits pointed at by the tail of the fish. Given fish have an orientation and deduced fish must be oriented such that the head and the tail point in opposite directions and face cardinally or diagonally.
Solution code: The 7 digits in row 8 (ignore the fish)
Comments
on 9. September 2025, 05:56 by Clementi
That was tough, but great fun. I made one incorrect assumption about the fish that forced me to restart, but got there eventually.
on 22. August 2025, 16:34 by QuiltyAsCharged
Very nice! I was glad to see this larger sized puzzle which opens up more possibilities. This ruleset really has legs. Or should I say fins?
on 21. August 2025, 14:53 by lmdemasi
Here fishy fishy fishy fishy fishy
on 20. August 2025, 21:01 by MSDOS
This was a lot of fun! Determining the fish locations and directions was really neat and fresh logic. Very enjoyable solve, great puzzle!
on 20. August 2025, 12:43 by vitaminz
Added another given
on 20. August 2025, 05:32 by GrizzledStoat
Does the fish at R2C6 imply that R1C7=R3C5+R4C4+R5C3+R6C2+R7C1?
Does the fish at R7C3 imply that R8C2=R6C4+R5C5+R4C6+R3C7+R2C8?
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Yes (keeping in mind that those cells may also contain fish and so not contribute to the sum)-Justin
