Inner Frame Sudoku is an interesting variation of classic Sudoku that introduces additional clues within a special frame inside the grid. Along with the standard Sudoku rules, solvers must use these frame-based clues to determine the correct placement of numbers. The extra constraints create new logical relationships that make the puzzle more challenging and rewarding to solve. Careful observation and deduction are essential for interpreting the clues and progressing through the grid. This puzzle is a great way to improve reasoning skills while enjoying a fresh twist on traditional Sudoku.
This Inner Frame Sudoku is my 17th contribution to the Daily Sudoku League. Can you solve this Sudoku puzzle?
Inner Frame Sudoku Rules
Classic Sudoku Rules apply. Additionally, numbers outside the frame represent the sum of the 2nd, 3rd, and 4th digits appearing in that direction.
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| Inner Frame Sudoku (Daily Sudoku League #17) |
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Next Daily Sudoku League Puzzle: Box Sum Sudoku
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9:43
11.00 - I took ages to spot a deduction based on classic sudoku rules and that provided the break.