- Click a character from the top menu and then click the cell where you wish to place that character. The actively selected character will be highlighted.
- Overwrite cells by placing a different character there or delete the value by clicking again with the current value.
- Click the reset button to clear your progress.
- Click the New Puzzle to select a new puzzle from the same or a new difficulty. Already completed puzzles will have a completely green background while partially completed puzzles will be partially green.
- Click the Home button to return to the home for this puzzle.
- If you win, a message should appear allowing you to select a new puzzle.
- Click the Show Solution button right above this message to show the solution.

Solve each sudoku puzzle while gaining the correct number of yards in each row. Moving from left to right in a row, each cell represents the number of yards gained on a down.

Each time you reach a total of 10 yards, you start over at first down for the next play. If you don't get at least 10 yards within 3 downs, then you must punt and the total for that row freezes at that point. Any future plays in that row are ignored.

For larger puzzles, the numbers 0-8 (not 1-9) are used, and smaller puzzles use 1-6. Each digit must appear once in each row, column, and block. Additionally, the yards gained must match the number given to the left of each row.

Each time you reach a total of 10 yards, you start over at first down for the next play. If you don't get at least 10 yards within 3 downs, then you must punt and the total for that row freezes at that point. Any future plays in that row are ignored.

For larger puzzles, the numbers 0-8 (not 1-9) are used, and smaller puzzles use 1-6. Each digit must appear once in each row, column, and block. Additionally, the yards gained must match the number given to the left of each row.

You need to be familiar with basic sudoku solving strategies, but advanced skills are not required. Note that the digits in the full 9x9 puzzles are 0-8 rather than the traditional 1-9 to make first downs less common, but the logic is the same as long you don't forget about 0.

It is usually better to focus on the left side of the puzzle since the order doesn't matter once 4th down has occurred. Rows with a total of less than 10 can make it easy to narrow down the first 3 plays.

The smallest and largest numbers are most likely to guarantee or prevent a first down, so they can be a bit easier to locate.

It is generally easier to first determine when a punt occurs and then add up all of the yards up to that point rather than trying to keep track as you go.

It is usually better to focus on the left side of the puzzle since the order doesn't matter once 4th down has occurred. Rows with a total of less than 10 can make it easy to narrow down the first 3 plays.

The smallest and largest numbers are most likely to guarantee or prevent a first down, so they can be a bit easier to locate.

It is generally easier to first determine when a punt occurs and then add up all of the yards up to that point rather than trying to keep track as you go.