Daisho Killer
Divide the grid into rectangular and square pieces of at least 2 cells. Additional fill digits in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The arrows show which cell is part of the rectangle with the greater number of cells. In every piece is exactly one number and this is the sum of the digits in this piece. In pieces no number is repeated.
Example with the digits 1 through 6:
Puzzle:
