Convection Currents
(Published on 20. May 2025, 15:16 by ThePedallingPianist)
SUDOKU: Place a digit from 1-9 in every cell such that digits do not repeat in a row, column or 3x3 box.
DOPPEL-DÖG: A cell on a loop with a digit D has a value equal to the digit in the cell D steps along the loop in the indicated direction.
REGION SUMS: Box borders split the blue line into segments whose values have equal sums.
PARITY: Values on a red line alternate between even and odd.
KROPKI: Values separated by a white dot are consecutive.
ODD: A grey circle contains an odd value.
Solution code: Row 5 (middle), left to right
Comments
on 18. June 2025, 17:45 by OrestisLomis
I spent so much time just staring (like multiple hours) until it finally clicked and then it suddenly felt super smooth. Well sort of, for some reason I thought a white kropki meant 'different parity', but of course it is a lot more useful than that.
Lovely puzzle!
on 23. May 2025, 22:58 by bboom
Took a while to get used to the brain-hurting levels of every-digit-is-actually-another-digit and the implications that had, but once that got rolling the deductions were amazing fun.
on 21. May 2025, 09:15 by TJ
Spent half the time solving with trying to understand the rules, the example by aqjhs really helps. (Click on his name and go to the puzzle: can I pet that dog)
Solving was quite smooth then.
on 21. May 2025, 07:47 by rockratzero
Very nice
on 20. May 2025, 20:02 by marcmees
Extremely craftfully set. Thanks.
on 20. May 2025, 18:06 by aqjhs
wanted to say this is the distilled essence of (Doppel) Dög with the risk it sounding like the puzzle is funky smelly... but it's more of a slick hi-tech optimized robot-Dög.
10/10 would recommend.
