Locate the position of a 10-ship fleet in the grid. The shapes of the ships are shown to the right of the grid. There is one 4x1 battleship, two 3x1 cruisers, three 2x1 destroyers and 4 1x1 submarines. The numbers beside the grid indicate the number of cells occupied by ships in each row, while the numbers below the grid indicate the number of occupied cells in each column. Ships may touch the edge of the board, but cannot touch each other, not even diagonally. Additional each cell has a number from 1 to 9. Place the digits so that each digit appears exactly once in each of the rows, columns and the nine outlined 3x3 regions. Cells with ship parts can only contain even numbers.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. The even clues along the edges tell you which digit is the first even digit from that vantage point. The odd clues along the edges tell you which digit is the first odd digit from that vantage point.

Smaller Example:

Puzzle:

Fill in the grid so that every row, every column and the 3x3 boxes contain the digits 1 through 9. All eight green lines must use no more then four digits. Each line must use three of these digits. All yellow cells must contain odd digits.

Fill the grid with the digits 1 to 9. The digits represent the height of the skyscraper in each cell. Each row, column and 3x3-box has exactly one of each digit. Yellow cells must contain odd digits, green cells must contain even digits. The green and yellow cells around the 9x9 grid tell you whether the number of skyscrapers you can see from that vantage point is even or odd. The clues in these cells tell you how many skyscrapers you can see from that vantage point.

Fill the grid with the digits 1 to 9. The digits represent the height of the skyscraper in each cell. Each row, column and 3x3-box has exactly one of each digit. The clues along the edges tell you how many skyscrapers you can see from that vantage point. Yellow cells must contain odd digits, green cells must contain even digits.

This combination variant was introduced by Cihan Altay at the 1st Sudoku World Championship.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. The colored extra-regions must contain each the digits 1 through 9.

In each 3x3 box their is a differet rule to follow:

- Upper left - Digital Sudoku: Digits are in digital form, as given below.
- Upper centre - Even/Odd Sudoku: Yellow cells must contain odd digits, green cells must contain even digits.
- Upper right - Consecutive Sudoku: All neighbouring cells with consecutive digits have a colored border.
- Centre left - Sum Sudoku (Killer Sudoku): Digits in a sub-region add up to the specified number.
- Centre - Classical Sudoku: No special rule.
- Centre right - Pips Sudoku: Digits are given as pips, like on dominoes or dices, as given below.
- Lower left - Big/Small Sudoku: Red cells must contain small digits (1 - 4), blue cells must contain big digits (5 - 9).
- Lower centre - Greater/Less Sudoku: The inewquality between each pair of digits must stand correct.
- Lower right - Sum Box Sudoku: First two row of numbers add up to the number formed on the third row.

Fill the grid with the digits 1 to 9. The digits represent the height of the skyscraper in each cell. Each row, column and 3x3-box has exactly one of each digit. The numbers tell you the sum of the marked cages. The clues along the edges tell you how many skyscrapers you can see from that vantage point. The cells on both diagonals have odd digits. In cages there can't be the same digit repeated.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The sum of the digits within each sub-region is equal to the specified number. No digits can be repeated in any cage. The colours say you whether an individual cell is even (green cells) or odd (yellow cells).

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. Yellow cells must contain odd digits, green cells must contain even digits. Red cells must contain small digits (1 - 4) and blue cells big digits (5 - 9).