Normal Sudoku rules apply.
Adjacent digits along red lines are of different parity.
Adjacent digits along orange lines differ by at least 4.
The digit in the grey circle is odd.
A digit in an outlined circle is the number of times that digit appears in outlined circles.
The numbers outside the grid show the total of the digits along the corresponding diagonal. (Digits may repeat.)
Try "Are you pondering what I'm pondering" here:
SudokuPad
am 9. September 2026, 01:33 Uhr von RockyRoer
I think so Brain, but who's going to lend us half a million USB sticks this close to halloween?