Place the digits 1 to 9 once each into every row, column and 3x3 box. Shade some cells in the grid such that all shaded cells are connected orthogonally and all unshaded cells are connected orthogonally. No 2x2 box may be fully shaded or fully unshaded. Clues outside the grid give the sum of the first continuous block of shaded cells seen from that direction. Blue cages are "vaults". Digits MAY repeat within a vault. Any digit within a vault must not appear in any cells orthogonally adjacent to that vault. The largest digit in any given vault is equal to the number of shaded cells inside that vault.