Solution code: Row 1 from left to right
on 20. June 2025, 18:12 by Mr Toffee
Changed puzzle link to incorporate rule change and added solution checker
on 20. June 2025, 18:04 by Mr Toffee
Changed thumbnail, smartened up and fundamentally changed rules (removed valve).
on 11. May 2024, 14:40 by Mr Toffee
Added Sudokupad link. Huzzah.
on 9. May 2024, 20:57 by Mr Toffee
@chain.reader Watch this space. Swaroop is applying his very capable brain to the problem at this very moment. Hopefully Penpa is bouncing back in a big way.
on 9. May 2024, 12:42 by chain.reader
penpa's a bit weird
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