Thermodynamic Loop
(Published on 17. September 2026, 11:44 by Wuschel)
- Normal Sudoku rules: Place the digits 1-9 in each row, column and box, without repeats.
- Thermometers: On a Thermometer digits strictly increase from bulb to tip.
- Loop: Draw a one cell wide loop in the grid that moves only orthogonally between cells and may not cross or touch itself, not even diagonally. The digit in a Thermometer bulb indicates, how many of the up to 8 surrounding cells are on the loop. Thermometers are not on the loop. The loop acts as an Entropic Line.
- Entropic Line: Each run of 3 adjacent digits on the line contains a low (1,2,3), a medium (4,5,6) and a high (7,8,9) digit.
- The Blue Square in box 9 is on the loop and contains an even digit.
Solution code: Digits on the loop in row 5
Solved by Adaki, raaaaa, sehringdipity, Joyofrandomness, Snookerfan, lmg131, redgecko, Starlight, Mattisahuman, SweJo, dogfarts, PippoForte, japanoise_breakfast, jseng, Pride, kangaroo, mathhead, pmatos, Tompzini, Exigus, econtrout, willman12345, Fenn, Casp_p, Ulistef, ebulku, Kormi
Comments
on 22. September 2026, 22:09 by econtrout
This was a really great puzzle...more folks should give it a go! The logic with the loop and arrows was very fun.
on 17. September 2026, 16:24 by Snookerfan
Very nice! Some surprising loop deductions, thanks!
on 17. September 2026, 16:10 by Joyofrandomness
Great puzzle! Thanks
