Cinderblock
Rules:
1. Normal Sudoku rules apply. The digits 1-9 appear exactly once in every column, row and 3x3 box.
2. Diagonals. The digits 1-9 appear exactly once on each of the main diagonals.
3. Quadruples. Digits in a circle appear in at least one of the surrounding four cells.
Please Enjoy!
Solution code: Row 4 (Left to Right)
on 5. April 2024, 06:25 by BorisTheSnake
Felt like a 1-star and the screen was a bit busy, but a nice and fun little puzzle
on 3. April 2024, 18:34 by Joanie
Fun logic I have not seen before. :)
on 3. April 2024, 09:42 by Fra314
The circles are a bit too big on SudokuPad and it's tricky to read the pencilmarks on a smaller screen. That said the puzzle is really fun and interesting throughout the whole solve!
on 3. April 2024, 06:05 by MarkSud
It's not too difficult but it is slow going. Good puzzle. 34 mins for me
on 2. April 2024, 23:27 by speedyjohn
Very tedious start, but once you get rolling it flows nicely.