Place the digits 0–8 once each in every row, column, and 3x3 box. A digit in a circle must appear at least once in the four surrounding cells. That digit also equals the number of surrounding cells that are shaded. A “?” represents the same number for both clues within a circle (i.e. that digit appears and that many cells are shaded). The value of “?” may differ between circles. Unshaded cells in the grid must be orthogonally connected, and unshaded cells that are orthogonally adjacent must have digits that differ by at least 5.