Diagramless Kakuro

Rules: Place the digits 1-n (1-7 for the example) and some black squares into the grid to form a valid kakuro puzzle. The black squares in the grid have 180-degree rotational symmetry, all white squares are connected, and all digits belong to a sum of two or more numbers in both directions.

Clues given next to the grid indicate the sums that are formed in the grid. For the row clues, this means all clues in the first row (from left to right) are listed before clues in the second row, and so on.  For the column clues, all sums that have their uppermost cell in the first row (from left to right) are listed before clues that have their uppermost cell in the second row, and so on.

Background: This type was invented by Thomas Snyder. I made first time for OAPC 6. Also I made for 10th 24 HPC and 18th WPC.

Example:


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