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

16-June-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 in adjacent cells cannot be consecutive.

16-June-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 in adjacent cells cannot be consecutive.

16-June-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.

16-June-2020

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

17-June-2020

- The same numbers are not chess-knight move connected.

17-June-2020

- The same numbers are not chess-knight move connected.

17-June-2020

- The same numbers are not chess-knight move connected.

17-June-2020

- The same numbers are not chess-knight move connected.

17-June-2020

- Digits in adjacent cells cannot be consecutive.

17-June-2020

- Digits in adjacent cells cannot be consecutive.

18-June-2020

- The same numbers are not chess-knight move connected.

18-June-2020

- The same numbers are not chess-knight move connected.

18-June-2020

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

18-June-2020

18-June-2020

- Apply Classic Sudoku rules. Within each coloured region each digit must appear exactly once.

18-June-2020

- Apply Classic Sudoku rules. Within each coloured region each digit must appear exactly once.

18-June-2020

- Apply Classic Sudoku rules. Within each coloured region each digit must appear exactly once.

18-June-2020

- Apply Classic Sudoku rules. Within each coloured region each digit must appear exactly once.

21-June-2020

- Identical digits do not touch each other diagonally.

21-June-2020

- Identical digits do not touch each other diagonally.

21-June-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.

21-June-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.

22-June-2020

- The same numbers are not chess-knight move connected.

22-June-2020

- The same numbers are not chess-knight move connected.

22-June-2020

- The same numbers are not chess-knight move connected.

22-June-2020

- The same numbers are not chess-knight move connected.

22-June-2020

- Digits in adjacent cells cannot be consecutive.

22-June-2020

- Digits in adjacent cells cannot be consecutive.

22-June-2020

- Apply Classic Sudoku rules. Within each coloured region each digit must appear exactly once.

22-June-2020

- Apply Classic Sudoku rules. Within each coloured region each digit must appear exactly once.

22-June-2020

- Apply Classic Sudoku rules. Within each coloured region each digit must appear exactly once.

22-June-2020

- Apply Classic Sudoku rules. Within each coloured region each digit must appear exactly once.

22-June-2020

- Digits outside the grid indicate the sum of the first 3 digits in the corresponding direction.

22-June-2020

- Digits outside the grid indicate the sum of the first 3 digits in the corresponding direction.

22-June-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.

22-June-2020

22-June-2020

22-June-2020