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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

19 April 2026

 

Duodoku

  • Follow classic sudoku rules.This puzzle consists of tow overlapping grids of classic sudoku.
Duodoku

Duodoku

  • Follow classic sudoku rules.This puzzle consists of tow overlapping grids of classic sudoku.

 

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.

 

147 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.
  • Cells with circles must contain digits 1-2-3, cells with squares must contain digits 4-5-6, blank cells must contains digits 7-8-9.
147 Sudoku

147 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.
  • Cells with circles must contain digits 1-2-3, cells with squares must contain digits 4-5-6, blank cells must contains digits 7-8-9.

 

Duodoku

  • Follow classic sudoku rules.This puzzle consists of tow overlapping grids of classic sudoku.
Duodoku

Duodoku

  • Follow classic sudoku rules.This puzzle consists of tow overlapping grids of classic 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.
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.

 

Makodoku

  • 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 cross between two cells indicates that the product of the numbers in these cells is less than 10. A plus between two cells indicates that the sum of the numbers in these cells is less than 10. If the sum and product are less than 10, then there is a cross between these cells. If there is no sign between two cells, then both sum and product are at least 10.
Makodoku

Makodoku

  • 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 cross between two cells indicates that the product of the numbers in these cells is less than 10. A plus between two cells indicates that the sum of the numbers in these cells is less than 10. If the sum and product are less than 10, then there is a cross between these cells. If there is no sign between two cells, then both sum and product are at least 10.

 

XV 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.
  • Adjacent cells with digits summing to 5 are marked by V, while those summing to 10 are marked by X. Not all possible V and X are marked.
XV Sudoku

XV 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.
  • Adjacent cells with digits summing to 5 are marked by V, while those summing to 10 are marked by X. Not all possible V and X are marked.

 

Give me Five 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.
  • Sum and difference of two orthogonally adjacent numbers must not be 5.
Give me Five Sudoku

Give me Five 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.
  • Sum and difference of two orthogonally adjacent numbers must not be 5.

 

Greater Than 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 have to be place in accordance with the “greater than” signs.
Greater Than Sudoku

Greater Than 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 have to be place in accordance with the “greater than” signs.

 

Edge Difference 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 difference between the first and the last number in the corresponding row or column.
Edge Difference Sudoku

Edge Difference 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 difference between the first and the last number in the corresponding row or column.

 

Greater Than 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 have to be place in accordance with the “greater than” signs.
Greater Than Sudoku

Greater Than 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 have to be place in accordance with the “greater than” signs.

 

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

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

 

Ten Box Sudoku

  • The diagram is a toroid; some of the 3×3 regions don't end at the right (lower) edge of the diagram but continue at the left (upper) edge of the diagram.
Ten Box Sudoku

Ten Box Sudoku

  • The diagram is a toroid; some of the 3×3 regions don't end at the right (lower) edge of the diagram but continue at the left (upper) edge of the diagram.

 

Greater Than 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 have to be place in accordance with the “greater than” signs.
Greater Than Sudoku

Greater Than 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 have to be place in accordance with the “greater than” signs.

 

Anti Knight 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 same numbers are not chess-knight move connected.
Anti Knight Sudoku

Anti Knight 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 same numbers are not chess-knight move connected.

 

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.

 

Hybrid Sudoku ( Consecutive Pairs + Sum Frame )

  • 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.
  • There are some dots between cells. The numbers on each side of a dot must always be consecutive. Not all possible dots are marked.
  • Digits outside the grid indicate the sum of the first 3 digits in the corresponding direction.
Hybrid Sudoku ( Consecutive Pairs + Sum Frame )

Hybrid Sudoku ( Consecutive Pairs + Sum Frame )

  • 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.
  • There are some dots between cells. The numbers on each side of a dot must always be consecutive. Not all possible dots are marked.
  • Digits outside the grid indicate the sum of the first 3 digits in the corresponding direction.

 

Even 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.
  • Cells with shaded squares contain even digits.
Even Sudoku

Even 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.
  • Cells with shaded squares contain even digits.

 

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.

 

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.
  • There are some dots between cells. The numbers on each side of a dot must always be consecutive. All possible dots are marked.
Consecutive Sudoku

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.
  • There are some dots between cells. The numbers on each side of a dot must always be consecutive. All possible dots are marked.

 

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