# Types of Sudoku puzzles

## Diagonal

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. Additionally, each digit appears exactly once in each of the two main diagonals.

 Sudoku Solution

## Diagonal Even

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. Additionally, each digit appears exactly once in each of the two main diagonals and the grey squares in the grid must contain even digits.

Sudoku   Solution

## Diagonal Odd

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. Additionally, each digit appears exactly once in each of the two main diagonals and the grey squares in the grid must contain odd digits.

Sudoku   Solution

## Even

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 grey squares must contain even digits.

Sudoku   Solution

## Irregular

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 irregularly shaped regions.

Sudoku   Solution

## Isosudoku

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, 9-cell diagonals and the nine outlined 3x3 regions. In the shorter diagonals all digits must be different.

Sudoku   Solution

## Killer

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 sum of the numbers in each outlined region is equal to the corresponding number given in a corner of the outline. No digit is repeated within a given outlined region.

Sudoku   Solution

## Kropki

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 absolute difference between two digits in neighbouring cells equals 1, then they are separated by a white dot. If the digit is a half of digit in the neighbouring cell, then they are separated by black dot. The dot between 1 and 2 can be either white or black.

Sudoku   Solution

## Little Killer

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 nine outlined 3x3 regions. Numbers with arrows indicate sum of the numbers in each direction.

Sudoku   Solution

## Lucky Seven

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. Additionally, each digit appears exactly once in each of the two main diagonals. All neighbouring cells linked with the line contain digits in arithmetical series (e. g. 234) or in a special one (e. g. 76567). Sudoku grid contains highlighted all the squares with even digits.

Sudoku   Solution

## Odd

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 grey squares must contain odd digits.

Sudoku   Solution

## Parquet

Place a digit from 1 to 9 into each of the empty squares so that each digit appears exactly once in each of the outlined squares 4x4, all 12 columns, all 12 rows, 9 top left corner, 9 central and 9 bottom right corner highlighted squares.

Sudoku   Solution