Logic Masters Deutschland e.V.

As an extension of the "Renbanomino" series, I created this puzzle using prime relationships.

Normal sudoku rules apply. Place one "omino" (an orthogonally connected set of shaded cells that contains one circled digit indicating its size) in each sudoku box so that across the entire grid:

• All shaded cells are connected.
• All unshaded cells are connected.
• No 2x2 area contains all shaded or all unshaded cells.
• Orthogonally connected shaded cells sum to a prime.

Partial Example

The partial example shows how three adjacent boxes might be filled:

Please leave a comment if you enjoy this puzzle.