Normal sudoku rules apply. Cells separated by the black dot contain digits in a 1:2 ratio (ie one digit will be double the other). The golden lines are “nabner” lines. Digits cannot repeat on a nabner line, and nabner lines cannot contain consecutive digits - regardless of order. Eg. if a line has a 3 anywhere on it, 2 and 4 cannot appear on that line. The blue lines in the grid are Region Sum Lines. The sum of digits on a blue line must be the same within each 3x3 box the line passes through.