Sums Sudoku

Place a digit from 1 to 9 into each of the empty squares so that each digit appears exactly once in each of the rows, columns and the nine outlined 3x3 regions.

A number between two cells indicates the sum of the numbers in these cells. A number between four cells indicates the sum between two diagonally adjacent cells, either top left + right bottom (\) or top right + bottom left (/).

Sudokus that no one can solve

Sudokus that no one can solve, not only including Sudokus which are very difficult but also those that no one has tried to solve.

14 November 2025

数独 | Cool Sudoku | 数独 | Sudoku Puzzle | 賢くなるパズル

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Sums Sudoku

Sudokus that no one can solve