Play on SudokuPad!
Normal sudoku rules apply.
Many cells are shaded. A cell is shaded if its digit indicates the minimum orthogonal distance to a circle.
A digit on an arrow indicates the distance to a shaded cell in that direction. If multiple shaded cells are in that direction, the arrow may indicate the distance to any of them.
Digits along a thermometer increase or stay the same, starting from the bulb.
