Many thanks go to ChinStrap for testing this and providing some useful aesthetic tweaks! Also, thanks to CtC community for testing. Good luck and happy solving!
Puzzle: Back and Forth
Rules:
Normal 9x9 Sudoku rules apply.
Parity mirror: A cell reflected by the dashed blue line onto another cell must both have the same parity.
Counting Circles: A digit in a circle indicates how many times that digit appears in circles.
Palindrome: Digits along a solid grey line must read the same each way. I.e 1234321 is a valid arrangement.
Renban: Digits on a purple line must form a set of non-repeating consecutive digits, in any order.
Solution code: Row 2, left to right, 9 digits no spaces:
on 25. August 2025, 18:42 by Jen118266
Fantastic puzzle. I always love puzzles by Fenners.
on 5. June 2025, 19:52 by Fenners
Thanks all for your lovely comments. It's also quite fitting that this puzzle has gone "Back and Forth" between 3* and 2*!
on 5. June 2025, 19:42 by Exigus
Fun parity puzzle, thanks!
on 5. June 2025, 11:49 by Franjo
Entertaining parity puzzle with funny palindromes! Thank you very much for creating and sharing this lovely puzzle.
on 5. June 2025, 09:17 by Snookerfan
Lovely puzzle! Based on my solve time 2 stars. Thank you
on 5. June 2025, 00:46 by AnebodaSlatorp
Ingenious
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Thanks AnebodaSlatorp! -Fenners
Difficulty: | ![]() |
Rating: | 94 % |
Solved: | 55 times |
Observed: | 3 times |
ID: | 000NND |
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