Frame Sudoku is known with many different names such as Outside Sums Sudoku or Sum Frame Sudoku. However generic name for this Sudoku type is Frame Sudoku. In this Sudoku type outside given hints gives the sums of the digits appearing in the first box for corresponding row or column. There is also Product Frame Sudoku where outside given hints gives the product of the digits in the first box for corresponding row or column. I have been using all these different names for this Sudoku type. There are a few Sudoku puzzles which I prepared recently. I am posting links to these puzzles here.

__Rules of Frame Sudoku__
Place a digit from 1 to 9 into each of the empty cells so that each digit appears exactly once in each row, column and 3x3 outlined box. Additionally numbers outside the grid equal the sum of the digits appearing in the cells in the first box (till the next bold line) seen from that edge of the grid.

Sum Frame Sudoku (Daily Sudoku League #142)

### Sum Frame Sudoku (Daily Sudoku League #179)

Sum Frame Sudoku (Daily Sudoku League #142)

### Sum Frame Sudoku (Daily Sudoku League #142)

### Outside Sums Sudoku (Fun With Sudoku #117)

There is a similar-looking Sudoku type which is called Inner Frame Sudoku. Here are some of the puzzles of Inner Frame Sudoku.

__Rules of Inner Frame Sudoku__
Classic Sudoku Rules apply. Additionally, numbers outside Frame represents the sum of 2nd 3rd and 4th digits appearing in that directions.

### Inner Frame Sudoku (Daily Sudoku League #141)

There are few Frame Sudoku Variations which are mentioned below. Rules of each puzzle type are given in the respective post.

**Serbian Frame Sudoku (Daily Sudoku League #169)**

Frame Diagonal Sudoku (Fun With Sudoku #196)

Frame-Diagonal Sudoku (Daily Sudoku League #158)

Serbian Frame Sudoku (Fun With Sudoku #185)

Frame Diagonal Sudoku (Fun With Sudoku #196)

Frame-Diagonal Sudoku (Daily Sudoku League #158)

Serbian Frame Sudoku (Fun With Sudoku #185)

Checkout more Sudoku Variations by clicking on the below image

Sudoku Variations Main Page |

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