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New Tutorial: Master Advanced Sudoku Techniques

New Tutorial: Master Advanced Sudoku Techniques

Visualize the logic of Skyscraper, 2-String Kite, and Turbot Fish (X-Chain).

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Today's Sudoku

13 April 2026

 

Non-Consecutive 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.
  • Digits in adjacent cells cannot be consecutive.
Non-Consecutive Sudoku

Non-Consecutive 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.
  • Digits in adjacent cells cannot be consecutive.

 

Extra Regions 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.
  • The connected shaded cells contain each digit from 1 to 9.
Extra Regions Sudoku

Extra Regions 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.
  • The connected shaded cells contain each digit from 1 to 9.

 

Clone 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.
  • 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.
Clone Sudoku

Clone 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.
  • 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.

 

Hybrid Sudoku ( X Sums + Consecutive )

  • 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.
  • Each number outside the grid is the sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed in that direction.
  • There are some dots between cells. The numbers on each side of a dot must always be consecutive. All possible dots are marked.
Hybrid Sudoku ( X Sums + Consecutive )

Hybrid Sudoku ( X Sums + Consecutive )

  • 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.
  • Each number outside the grid is the sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed in that direction.
  • There are some dots between cells. The numbers on each side of a dot must always be consecutive. All possible dots are marked.

 

Sum Frame 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.
  • Digits outside the grid indicate the sum of the first 3 digits in the corresponding direction.
Sum Frame Sudoku

Sum Frame 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.
  • Digits outside the grid indicate the sum of the first 3 digits in the corresponding direction.

 

Hybrid Sudoku ( X Sums + Greater Than )

  • 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.
  • Each number outside the grid is the sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed in that direction.
  • Digits have to be place in accordance with the “greater than” signs.
Hybrid Sudoku ( X Sums + Greater Than )

Hybrid Sudoku ( X Sums + Greater Than )

  • 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.
  • Each number outside the grid is the sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed in that direction.
  • Digits have to be place in accordance with the “greater than” signs.

 

Quadruple 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.
  • Each set of four digits in the intersection of two lines indicates the digits that have to be placed in the four adjacent cells.
Quadruple sudoku

Quadruple 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.
  • Each set of four digits in the intersection of two lines indicates the digits that have to be placed in the four adjacent cells.

 

Multi Diagonal 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.
  • Digits do not repeat along the marked diagonals.
Multi Diagonal Sudoku

Multi Diagonal 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.
  • Digits do not repeat along the marked diagonals.

 

MiniMax 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 at the edge of the diagram indicates the sum of the highest and the lowest number in the first three cells in the corresponding row or column.
MiniMax Sudoku

MiniMax 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 at the edge of the diagram indicates the sum of the highest and the lowest number in the first three cells in the corresponding row or column.

 

Multi Diagonal 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.
  • Digits do not repeat along the marked diagonals.
Multi Diagonal Sudoku

Multi Diagonal 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.
  • Digits do not repeat along the marked diagonals.

 

Cupid 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.
  • An arrow in a cell indicates that the number in this cell is repeated at least once in the direction the arrow points to.
Cupid Sudoku

Cupid 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.
  • An arrow in a cell indicates that the number in this cell is repeated at least once in the direction the arrow points to.

 

Count different 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.
  • Arrows and numbers outside gridding means how many different numbers in corresponding direction grid.
Count different Sudoku

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

 

X 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.
  • Each number outside the grid is the sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed in that direction.
X Sums Sudoku

X 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.
  • Each number outside the grid is the sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed in that direction.

 

Little killer 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.
  • Numbers with arrows indicate sum of the numbers in each direction.
Little killer sudoku

Little killer 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.
  • Numbers with arrows indicate sum of the numbers in each direction.

 

Ten-Eleven 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 dot between two cells indicates that the sum of the numbers in these cells is 10 or 11. If no dot between two cells the sum of the numbers in these cells must not be 10 or 11.
Ten-Eleven Sudoku

Ten-Eleven 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 dot between two cells indicates that the sum of the numbers in these cells is 10 or 11. If no dot between two cells the sum of the numbers in these cells must not be 10 or 11.

 

Multi Diagonal 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.
  • Digits do not repeat along the marked diagonals.
Multi Diagonal Sudoku

Multi Diagonal 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.
  • Digits do not repeat along the marked diagonals.

 

Fortress 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.
  • If a shaded cell and a white cell are adjacent then the digit in the shaded cell is greater.
Fortress Sudoku

Fortress 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.
  • If a shaded cell and a white cell are adjacent then the digit in the shaded cell is greater.

 

Little killer 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.
  • Numbers with arrows indicate sum of the numbers in each direction.
Little killer sudoku

Little killer 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.
  • Numbers with arrows indicate sum of the numbers in each direction.

 

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

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

 

Windoku

  • 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.
  • Each of the four shaded 3x3 boxes contains each digit from 1 to 9.
Windoku

Windoku

  • 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.
  • Each of the four shaded 3x3 boxes contains each digit from 1 to 9.