Hello.
Parity counter lines: the two digits at the ends of each line indicate the number of odd and even digits in that line, including the end digits themselves. One digit counts odd digits; the other counts even digits.
BitClock: Each BitClock consists of an arrow cell at the centre of the clock and its four orthogonal neighbours. The digit in the arrow cell encodes the parity (odd or even) of those four neighbours.
Even digits represent bits that are ON (E), and odd digits represent bits that are OFF (O). The corresponding 4-bit code for each digit (read from left to right) determines the parities of the four adjacent cells.
The arrow indicates the starting bit of the sequence, which continues clockwise around the BitClock.
Example: If a 3 is placed in a BitClock cell, its code is OOEE. Starting from the direction of the arrow and reading clockwise, the four orthogonal neighbours must be Odd, Odd, Even, Even.
Digit Codes:
1 → OOOE
2 → OOEO
3 → OOEE
4 → OEOO
5 → OEOE
6 → OEEO
7 → OEEE
8 → EOOO
9 → EOOE
Have fun.
Lösungscode: Row 9, first 6 digits.
am 6. November 2025, 17:03 Uhr von egubachu
This puzzle is so much fun! It is full of really nice deductions throughout the solve. The special thing about this puzzle, why I enjoy it so much is that even though none of the deductions are really hard, they all feel rewarding! It’s a treat to solve!
am 4. November 2025, 23:10 Uhr von dzamie
I found it pretty easy, myself, though it takes some getting used to, reading the bits clockwise like that. Knowing the relationship a number's parity has with SPOILER was very helpful.
Edit: blazed through in just over 16 minutes, which seems incongruous with others' experiences, so I hope I didn't accidentally make a lucky guess rather than going through logically.
Thanks for your comment. 16 minutes seems very reasonable if you catch on to the logic quickly. The puzzle is not designed to be difficult. It was designed to be smooth. Grts - Jonesy.
am 4. November 2025, 19:56 Uhr von JRaunak
Great puzzle, but its easy to make mistakes in it
am 3. November 2025, 16:22 Uhr von superkinkel
Gorgeous puzzle. I love the BitClock Constraint. Once you got a hang of it, I would think it's rather a two star difficulty though (even if it took me an hour).
Yes, I agree. Once you get used to it, it becomes much easier. Actually curious to see where it will end up once it is rated. Grts - Jonesy.
am 3. November 2025, 08:05 Uhr von Fra314
Just beautiful, filled with cool deductions and clever interactions!