Red Square Blue Square
(Published on 7. June 2023, 17:29 by marty_sears)
- Divide the grid into ten orthogonally connected 10-cell regions.
- Each digit from 0-9 appears in one red square and one blue square, and also once in every row, column and region.
- Each region contains one red square and one blue square, whose digits sum to 9.
- A digit in an arrow cell indicates the number of borders (separating two regions) it sees in a straight line in the direction of the arrow. Borders on the outer perimeter of the grid don’t count, because they aren’t separating two regions.
Click here to play on the CTC app
Please leave a comment if you enjoy :)
Solution code: Row 6 from left to right
Comments
on 18. October 2024, 16:15 by jakestilesowen
Truly excellent. I love the combination of the flood fill logic with the arrows.
on 29. February 2024, 17:35 by lmdemasi
Kept thinking I had broke the regions, but always manage to squeak them in there. Only 3 more puzzles to go in my marty_sears backlog!
on 3. January 2024, 00:52 by Fool on Hill
Lovely puzzle. I finally got time to give it the attention it deserves. As always some interesting ideas. The red/blue idea with pairs (of different kinds and different perhaps with different restrictions) has lots of possibilities.
on 5. October 2023, 22:23 by Silverbyte
Not too difficult actually! I never got stuck but what a beautiful puzzle
on 4. October 2023, 17:10 by the_cogito
The most fun I've had solving in some time, this puzzle is stunningly good.
on 12. June 2023, 07:47 by Lavender Gooms
Fantastic. Really enjoyed this ruleset.
on 11. June 2023, 06:12 by GarageDoorOpener
LOVED ITTTTT!
on 9. June 2023, 14:39 by ONeill
Fun ruleset! Thanks :)
on 8. June 2023, 14:23 by marcmees
nice puzzle. thanks.
on 8. June 2023, 14:00 by Snookerfan
Excellent puzzle! Thank you
on 7. June 2023, 22:59 by Jorrr2
Ohohhh, I forgot both digits in squares add up to 9, so I was stuck for an hour :D.
In the end it isn't too bad. 3,5 stars for me. Thank you!
