Cryptic checkers (Ambiguous Battenburg sudoku)
(Published on 9. March 2024, 18:04 by sujoyku)
- Normal Sudoku rules apply.
- Killer cages: Digits in a cage sum to the clue in the top left.
- Ambiguous Battenburg: Mark each cell of the grid with one of two different colours (e.g. red and blue) such that each digit always appears in cells of the same colour. (For example, if a 1 is in a red cell, all 1s in the grid have to be in red cells.) In any killer cage, all cells have the same colour (i.e. any cage is entirely red or entirely blue, but does not consist of both red and blue cells). Whenever 2 digits of both colours each form a 2x2 checkerboard pattern, a Battenburg marking is given. If there is no such marking, the above pattern is not allowed.
Here you can solve the puzzle online:
Solution code: Row 5 from left to right (9 digits in total)
Comments
on 26. April 2024, 10:50 by Lenivaya_Joppa
Thank you for this very interesting puzzle, dear sujoyku! I really enjoyed solving it, once I had understood the rules! ;) And like Grey already wrote, the logic flew nicely. :)
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You are welcome, Lenivaya_Joppa, thank you for the comment! I am glad you enjoyed the puzzle and liked its flow.
Kind regards, sujoyku
on 11. March 2024, 13:10 by topoi
Great puzzle! Very smooth. Also agree about the 2*. Maybe it's because I'm familiar with the ambiguous Battenburg logic from your other puzzle.
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Thank you for commenting, topoi! I am glad that you liked the puzzle. Concerning difficulty: As you are agreeing with Grey's assessment, it is probably just me overestimating the difficulty level. My intended solve path involves a few advanced Sudoku techniques (that probably can be circumvented) which made me rather err on the more difficult side. Thanks again for sharing your opinion.
Kind regards, sujoyku
on 10. March 2024, 04:15 by Grey
Brilliant puzzle! However I personally find it to be closer to a 2 star puzzle as the logic puzzle flowed nicely. I only struggled a bit at the end in disambiguating the second set of digits.
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Thank you for the comment, Grey! I am glad that you enjoyed the flow of the puzzle. Also thanks for sharing your perspective on difficulty. The placement inside one of the groups was the part that I found most difficult.
Kind regards, sujoyku
