To the right is an example of a partial Sudoku puzzle. Using only the given information, there is a way for you to locate the position of a "1" on the grid. Can you figure it out? Move your mouse over the puzzle to reveal the answer. The correct position will be highlighted in green.

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Step-by-Step Explanation:

1. Look at where each "1" is located. You can't place a "1" in the first row because there is already a "1" in that row. In addition, you can't place a "1" in the first column for the same reason. The first row and the first column are darkened because a "1" can't go in either row or column.
2. Look at the 3x3 block in the upper left corner. A "1" has to go somewhere in this box because of the rules. The "1" can't go in any of the darkened areas, and it obviously can't go in the boxes where the "2," "3," "4" and "5" are. This only leaves the two squares that are highlighted yellow.
3. Look at the row of the two yellow highlighted squares. Since we know that one of these is a "1," a "1" can't be in any other part of that row. The first row is darkened because a "1" can't go in that row.
4. Look at the 3x3 block in the upper middle side. A "1" has to go somewhere in this box because of the rules. The "1" can't go in any of the darkened areas, and it obviously can't go in the boxes where the "2" and the "6" are. This only leaves the square that is highlighted green.