normal 6x6 sudoku rules apply: fill the grid with digits 1-6 so that no digit repeats in any row, column, or box.
there is no negative constraint in this puzzle
all variant clues follow their standard meanings; full descriptions are provided below.
Solution code: row 5, left to right
on 28. May 2026, 23:06 by AaronH
added walkthrough video
on 28. May 2026, 19:13 by Supertaster
By far the easiest of this little series. Probably should have been the first one?
Either way, loved this puzzle and this series, thank you.
AaronH: Thank you for the kind words - glad you enjoyed it all! I can see that - this one is probably a bit more approachable. I put it later as it felt a bit more unique than the others :)
on 28. May 2026, 16:26 by JVA
I just tested every possibility for the bottom left cell
AaronH: Glad you stuck with it! I’ve got a walkthrough linked on the page showing how I approached it if you want to compare approaches
on 28. May 2026, 13:21 by damo_89
Really enjoyed this. I think there is some meta that you can work out at the beginning and if so this flows very smoothly.
on 28. May 2026, 03:04 by SanFranSam
Did a little colouring but ended up using brute force. Couldn't trace all the restrictions in my head.
AaronH: Nice work getting through it. I’ve got a walkthrough linked on the page showing how I approached it if that’s useful
on 28. May 2026, 02:06 by macintux
Sadly sometimes obvious deductions aren’t. 8 minutes of scratching my head, 3 minutes of solving. Great puzzle.