Normal sudoku rules apply. Clues in the top left corner of a cell mean that that cell is part of a cage whose digits sum to that clue's value. A cage is an orthogonally connected set of cells in which no digit may repeat. Each cage contains exactly one given clue. Cages do not overlap. If a clue is a question mark it is unclear how large the sum of the respective cage is. The cages are "greedy" ie digits in a cage cannot appear in any orthogonally adjacent cells or cages.