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About game
Build the Sum: Number Crossword is a relaxing math puzzle for fans of logic games, Sudoku and number puzzles. Each level offers new number combinations and satisfying challenges based on finding the correct sums.
The game combines simple rules with engaging gameplay, featuring limited moves, helpful boosters and gradually increasing difficulty. Train your logic and attention while solving increasingly challenging number crosswords
How to play
Select numbered cells to build the required sums for each row and column. Complete the level by matching all target sums.
Click or tap a cell to select it, and click or tap again to remove the selection. Every move uses energy, so plan your choices carefully.
If you run out of energy before completing the puzzle, the level is lost. Use boosters to get hints, undo moves or gain extra energy when you need it most