24 / 4
(Published on 24. April 2026, 10:11 by marty_sears)
Rules:
QUATTROQUADRI: Fill the grid with the digits 1-9 so that digits don't repeat in any row, column or box.
FULL RANK: Each row contains a 6-digit number reading forwards and another reading backwards. Each column contains a 6-digit number reading downwards, and another reading upwards.
These 24 numbers are ranked from 1-24, from lowest to highest. There are no tied ranks, so none of the numbers are the same. A purple circle contains the rank of the 6-digit number it points at (reading in the direction the arrow is pointing.)
BLACK DOTS: If two digits are joined by a black dot, one is double the other.
RED DOTS: If two digits are joined by a red dot, one is odd and the other is even.
YELLOW DOTS: If two digits are joined by a yellow dot, they are NOT consecutive.
Solution code: Rank 10
Comments
today, 10:31 by protheph
Very fun solve! I managed to finish without ever using either yellow dot, which makes me wonder if I made some lucky leaps that weren't strictly sound logic.
today, 06:32 by Klausku
Very nicely constructed. Thanks!
today, 02:46 by Atticus837
At every turn, this felt like there just wasn't enough information to solve - literally right up to the last step. And at every turn, it turned out to be easier and cleaner than it seemed. Beautiful construction!
yesterday, 20:55 by davidz32z
I found this extraordinarily challenging! Really lovely stuff though, happy birthday TPP!!
on 24. April 2026, 22:09 by nunc
I am stunned how this all solved (especially in the end).
on 24. April 2026, 22:00 by ThePedallingPianist
This ranks in my top 244 favourite puzzles ever! Thank you!
on 24. April 2026, 15:23 by blackjackfitz
Huzzah!
on 24. April 2026, 14:09 by AshBrown
Happy birthday TPP
on 24. April 2026, 13:56 by damo_89
Happy birthday Stu!
on 24. April 2026, 13:33 by Mennoo_
Happy birthday, ThePedallingPianist!
Good and fun snack, but overall brilliant setting!
on 24. April 2026, 13:05 by Franjo
What a beautiful present! Thank you very much for creating and sharing another great little puzzle and: Happy birthday, ThePedallingPianist!
on 24. April 2026, 11:07 by Titus Adduxas
Some lovely logic as per usual.
on 24. April 2026, 10:48 by oskode
Awesome construction as always!
