In Cross Sum, you are given a grid of white and black cells, and your goal is to fill in the white cells with numbers from 1 to 9 such that the sum of the numbers in each horizontal and vertical run of white cells matches the number in the corresponding black cell. The game is played by starting with the clues in the black cells, which give the sum of the numbers in the corresponding run of white cells. You then have to use logic and deduction to figure out which numbers to place in each run of white cells to make the sum match the clue. Continue to solve more Puzzle Page Puzzles.