Normal sudoku rules apply; i.e. the digits 1 to 9 need to be placed, once each, in every row, column, and 3x3 box.
Cells separated by a black dot must be in a 2:1 ratio, Cells separated by a white dot must be consecutive.
Digits along the blue diagonal cannot repeat.
The gray lines in the grid are palindrome lines; meaning that digits along the lines read the same forwards and backwards.
Solution code: box 3