![]() ![]() Once you fill in a value, the number you enter is struck out of the Possibility List everywhere in that entry's row, column, and 3 X 3 box. The nine cells in the other columns of that entry are that entry's "Possibility List", showing which numbers can still possibly be placed in that entry, based on the other entries that have been set. To fill in an entry, you put a number into the middle cell of the leftmost column (which has a lightly colored background). In the spreadsheet, each "entry" in the Sudoku grid is represented by a lightly outlined set of 12 spreadsheet cells, 4 wide by 3 high. The spreadsheet handles the mechanics of constraint propagation in a Sudoku grid. But if you want to get an idea of what the spreadsheet does before you download it, you can read the instructions here. That's a better place to read them, because the instructions in the spreadsheet give more examples in spreadsheet form. The following instructions are included in the spreadsheet. If you want a Wordoku spreadsheet, click here If you want to send me mail, click here The corner shown illustrates how the spreadsheet propagates Sudoku constraints: when a number is entered into an entry (on the left side of the entry, in red, in the light-blue spreadsheet cells), it is struck out of the “Possibility List” (on the right side of the entry) everywhere in that entry's row, column, and box. ![]() Here's a screen image of a corner of the spreadsheet, partially filled in with numbers: To download it in Windows, right-click on the link just below, and select “Save target as. ![]() Scroll down on this page if you want to learn more about it. I've been told that it does not work using Microsoft "Works". It was written in Microsoft Excel 2003, using basic Excel only (no macros). You may use it, and pass it on to others if you wish. Using the link just below, you can download the Excel spreadsheet I wrote to help solve Sudoku puzzles. ![]()
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