London Underground
(Published on 24. October 2022, 16:00 by Blobz)
Normal sudoku rules apply.
Digits along the grey (Northern) and blue (Victoria) lines have an equal sum N within each box they pass through (Region Sum). N may be different on each line.
Digits along the green (District) line must differ by at least 5 (German Whisper).
Digits along the red (Central) line must be 5 or greater.
Any set of three sequential cells along the yellow (Circle) line must contain a low (1-3) digit, a middly (4-6) digit, and a high (7-9) digit (Entropic).
The pink (Hammersmith & City) line contains a set of the digits 1-9 in any order (Renban).
The digits separated by Victoria Station (black dot) have a 2:1 ratio (Kropki).
Have fun, leave a comment if you enjoy the puzzle!
Solution code: Row 4 followed by Column 7
Comments
on 19. July 2024, 20:57 by snuuba
I usually like less busy puzzles, so I don’t get overwhelmed so easily. This one was one of the better ”busy” puzzles. It felt that the next deduction required was always well signalled and I didn’t get lost. Thanks.
on 11. April 2024, 19:30 by SudokuHero
What a joy
on 23. December 2022, 07:42 by Mojo872
Very neat! Just the right amount of challenging, and a lovely representation of the Tube :)
on 5. December 2022, 15:53 by Fizz
Awesome idea and very nice puzzle!
on 10. November 2022, 23:03 by chain.reader
Loved it.
a good workout to find that one tricky digit!
on 26. October 2022, 01:28 by timotab
Great theme. Thank you!
on 24. October 2022, 23:29 by nunc
Wonderful puzzle, great idea! Thanks a lot.
on 24. October 2022, 16:21 by StefanSch
I love puzzles with a real inspiration. Thank you!
