Frame-Diagonal Sudoku appeared in 2nd round of World Puzzle Federation Sudoku Grand Prix 2016. I created this Sudoku for the practice to this championship. This Sudoku type is almost similar to Frame Sudoku with additional rule that two main diagonals also should contain numbers from 1 to 9. In fact frame Sudoku without this diagonal rules is most of the time solvable when all the frame hints are given. With the additional constraint of diagonals also containing numbers from 1 to 9 makes the puzzle easier. This is the reason I have not given all the frame hints to make this Sudoku challenging. I enjoyed while creating this Sudoku and found it tough. So I will not recommend this Sudoku for the new players. Hopefully experienced players will enjoy this Sudoku.

This Frame-Diagonal Sudoku, I am posting in The League of Extraordinary Ladies & Gentlemen as 158th puzzle in this series.

*Rules of Frame-Diagonal Sudoku*
Apply Standard Classic Sudoku rules. Additionally, each marked diagonal must also contain each number from 1-9 exactly once. The clues outside the grid indicate the sum of the first 3 numbers placed in the corresponding direction.

Frame Diagonal Sudoku (Daily Sudoku League #158) |

Previous Sudoku Quadruple Sudoku (Daily Sudoku League #157)

Next Sudoku No Touch Sudoku (Daily Sudoku League #159)

Below is answer of Serbian Frame Sudoku puzzle titled Serbian Frame Sudoku (Fun With Sudoku #185)

Serbian Frame Sudoku (Fun With Sudoku #185) Puzzle Answer |

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