Normal sudoku rules apply. Digits along a thermometer increase from the bulb end. The digits in a cage sum to the number shown, if given. Digits may not repeat within a cage. Shade some cells such that the shaded cells and the unshaded cells each form a single orthogonally-connected region. No 2x2 area can be completely shaded or unshaded (Yin-Yang rules). In a cage, even digits are always shaded, odd digits are always unshaded. On a thermometer, odd digits are always shaded, even digits are always unshaded.