Two-Tone Totals
(Published on 30. October 2025, 00:13 by marty_sears)
Rules:
Normal sudoku rules apply.
Colour each cell either yellow or blue. All cells of the same colour must be orthogonally connected, and no 2x2 area may be all one colour.
A purple frame contains two cells of the same colour, and displays the total of the digits of that colour within that 3x3 box (reading left to right, or downwards.)
If two digits are joined by an X, they sum to 10.
If two digits are joined by a black dot, then one is double the other.
Solution code: Row 4 from left to right
Comments
on 25. November 2025, 01:44 by Kirra
This puzzle really pushed my skills. I had such a blast doing it.
on 1. November 2025, 22:54 by egglet
usually terrible at yinyangs but i managed to solve this in 50. very proud of myself & really enjoyed it.
on 31. October 2025, 14:13 by rysmyth240
brain broken
on 31. October 2025, 14:12 by Titus Adduxas
Wow! What an amazing puzzle! It’s hard to imagine how you could ever imagine such an idea yet alone make it work! I did keep missing relatively obvious steps but nonetheless completed it in just over 80 minutes. Loved it! ❤️
on 31. October 2025, 13:43 by damo_89
I rebelled and used green and grey, come get me
on 31. October 2025, 04:39 by KelleyCook
Didn't seem super hard, but it still took a long time to solve. Slightly under 2 hours.
on 31. October 2025, 04:08 by Atticus837
The absolute audacity of this man to mandate which two colours I use for my yin-yang shading... and yet - you bet I was obedient and used yellow and blue exactly as instructed.
on 30. October 2025, 22:13 by SennyK
I really enjoyed this puzzle, well done, thank you for sharing!
on 30. October 2025, 22:06 by AshBrown
Took me over 4 hrs
on 30. October 2025, 16:11 by blackjackfitz
I tried fruitlessly to solve this without actually understanding it. But once I gave myself the space to actually understand what was happening, the solve path was both elegant and straightforward. Lovely construction as always Marty!
on 30. October 2025, 14:55 by bboom
Cool ruleset as always, and leading into a fun puzzle with a nice back-and-forth between shading, summing and sudoku.
on 30. October 2025, 13:20 by Snookerfan
Great puzzle! Tricky in the midsolve. Thank you
on 30. October 2025, 13:16 by Franjo
Excellent YY-construction with a nice solution path. Thank you very much for creating and sharing this lovely puzzle.
on 30. October 2025, 13:05 by mscha
Very nice puzzle with a newish Martyesque ruleset!
A fairly easy start, once you find out the properties of the purple frames. I got stuck in the middle for a while, but when I finally made some progress, the rest solved itself.
Now back to the Mirrors, these are still Mysterious to me.
on 30. October 2025, 01:43 by ViKingPrime
Just Marty being Marty.
on 30. October 2025, 00:34 by vitaminz
A truly lovely puzzle. Very smooth
