Normal sudoku rules apply. Digits along a thermometer increase from the bulb end. Nine cells in the grid (one per row, column and box) are doublers, which count as double their value on thermometers. Each digit appears in exactly one doubler.
Normal sudoku rules apply. Digits along a thermometer increase from the bulb end. Nine cells in the grid (one per row, column and box) are doublers, which count as double their value on thermometers. Each digit appears in exactly one doubler.