Normal sudoku rules apply.
Thermometers: Digits on a thermometer increase from the bulb end.
Clouds: Cells containing 7, 8 or 9 act as clouds.
Suns: Place one copy of each of the numbers 1 - 5 in the five cells with suns. These suns act as the bulbs of additional thermometers ("rays of sunlight") of unknown length. These rays radiate outwards in all eight directions from the sun until they encounter a cloud which blocks the sunlight.
Lösungscode: Row 6