PyraNum

EditBy: PyraNum is a simple math puzzle. You complete a pyramid of numbers by filling in blank positions given three rules: 1.A cell value must be sum or difference of the two cells below2. A row cannot have duplicate numbers3. A number cannot be less than one or more than the Grid size Some numbers in the grid are given as clues. Puzzle cells are stacked like a pyramid with size varying from 5x5 to 9x9. 20,000 ready made puzzles are provided with the program. How to Solve a PuzzleNormally you would print a puzzle and solve it on paper at your leisure. However you can also solve on screen using the following commands:1. Use menu Puzzle/Create to create a fixed or a random size puzzle, or2. Load an existing puzzle file and select a puzzle3. Move and place mouse cursor on a cell (no need to click) and enter the desired number (one digit)4. Can also right-click a cell and enter a number from the drop down menu5. Program validates the number: no duplicates in a row; no number greater than the puzzle size; and an incorrect number when the two numbers beneath are known.6. In case of invalid entries, status bar at bottom right turns red7. Puzzle is solved when all entries are correct and all cells have been filled8. If entries are correct, status bar at bottom right stays green9. One would normally build the puzzle bottom up. However easy or single solution cells should be tackled first.10. Each puzzle can be solved by Logic alone; smaller size puzzles would obviously be easier to solve11. Use menu Puzzle/Autosolve to let computer solve a puzzle