Normal sudoku rules apply. Along the thermo, 2-digit numbers increase from the bulb - any 2-digit numbers beginning with 2 or 8 must have an odd second digit. The black dot joins digits with a 1:2 ratio
Normal sudoku rules apply. Along the thermo, 2-digit numbers increase from the bulb - any 2-digit numbers beginning with 2 or 8 must have an odd second digit. The black dot joins digits with a 1:2 ratio