Sudokus that no one can solve, not only including Sodukus which is very difficult but also that no one trying to solve it.

13-August-2020

- 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.
- Arrows and numbers outside gridding means how many different numbers in corresponding direction grid.

13-August-2020

- 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.
- Arrows and numbers outside gridding means how many different numbers in corresponding direction grid.

14-August-2020

- 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.
- Digits do not repeat along the marked diagonals.

14-August-2020

- Digits do not repeat along the marked diagonals.

14-August-2020

- Identical digits do not touch each other diagonally.

14-August-2020

- Identical digits do not touch each other diagonally.

14-August-2020

- Digits in adjacent cells cannot be consecutive.

14-August-2020

- Digits in adjacent cells cannot be consecutive.

14-August-2020

- Arrows and numbers outside gridding means how many different numbers in corresponding direction grid.

14-August-2020

14-August-2020

- The connected shaded cells contain each digit from 1 to 9.

14-August-2020

- The connected shaded cells contain each digit from 1 to 9.

14-August-2020

- The connected shaded cells contain each digit from 1 to 9.

14-August-2020

- The connected shaded cells contain each digit from 1 to 9.

14-August-2020

- The connected shaded cells contain each digit from 1 to 9.

14-August-2020

- The connected shaded cells contain each digit from 1 to 9.

15-August-2020

- Digits do not repeat along the marked diagonals.

15-August-2020

- Digits do not repeat along the marked diagonals.

15-August-2020

- Digits do not repeat along the marked diagonals.

15-August-2020

- Digits do not repeat along the marked diagonals.

15-August-2020

- The digits in two orthogonally adjacent cells cannot have a sum of either 5 or 10.

15-August-2020

- The digits in two orthogonally adjacent cells cannot have a sum of either 5 or 10.

15-August-2020

- The digits in two orthogonally adjacent cells cannot have a sum of either 5 or 10.

15-August-2020

- The digits in two orthogonally adjacent cells cannot have a sum of either 5 or 10.

15-August-2020

15-August-2020

15-August-2020

- The connected shaded cells contain each digit from 1 to 9.

15-August-2020

- The connected shaded cells contain each digit from 1 to 9.

15-August-2020

- The connected shaded cells contain each digit from 1 to 9.

15-August-2020

- The connected shaded cells contain each digit from 1 to 9.

17-August-2020

- The digits in two orthogonally adjacent cells cannot have a sum of either 5 or 10.

17-August-2020

- The digits in two orthogonally adjacent cells cannot have a sum of either 5 or 10.

17-August-2020

- Grey cells in the grid represent many cloned areas. Digits in these areas on corresponding positions must be identical. Cloned areas are only moved, without rotation or reflection.

17-August-2020

- Grey cells in the grid represent many cloned areas. Digits in these areas on corresponding positions must be identical. Cloned areas are only moved, without rotation or reflection.

17-August-2020

- The connected shaded cells contain each digit from 1 to 9.

17-August-2020

- The connected shaded cells contain each digit from 1 to 9.

18-August-2020

- Digits do not repeat along the marked diagonals.

18-August-2020

- Digits do not repeat along the marked diagonals.