Fill the grid with natural numbers. In each cell the number is the sum of the gaps of this cell with its orthogonal adjazent neighbors.

Example:

Puzzle:

Locate the position of mines in the grid. The numbers in the grid indicate the number of cells occupied by mines in adjazent cells, including diagonally or on the numbered square. In the marked regions either all or none cell has a mine.

Locate mines in the circular grid. The numbers in the grid indicate the number of mines in adjazent cells, including diagonally. There are no mines in the numbered squares.

Example:

Puzzle:

Locate the position of the given 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 in the grid indicate the number of cells occupied by ships in adjazent cells (only horizontally or vertically adjazent cells). Ships may touch the edge of the board, but can touch each other only diagonally. Ships do not overlap the numbered squares.

Locate the position of the fleet in the grid. The shapes of the ships are shown to the right of the grid. The numbers in the grid indicate the number of cells occupied by ships in adjazent cells, including diagonally. Ships may touch the edge of the board, but can't touch each other, even not diagonally. Ships do not overlap the numbered squares.

Example:

Puzzle:

In every row and column is exactly one circle, one square and one triangle. Locate the position of these symbols. The numbers in the grid indicate the number of cells occupied by symbols in adjazent cells, including diagonally. Symbols are not on the numbered squares.

Smaller example with two symbols:

Puzzle:

In every row and column is exactly one circle, one square, one triangle and one moon. Locate the position of these symbols. The numbers in the grid indicate the number of cells occupied by symbols in adjazent cells, including diagonally. Symbols are not on the numbered squares.

Puzzle:

Locate the position of 20 chess knights in the grid. The numbers in the grid indicate the number of knights attacking this cells. Knights are not on the numbered squares.

In every row and column is exactly one circle, one square, one triangle and one moon. Locate the position of these symbols. The numbers in the grid indicate the number of cells occupied by symbols in adjazent cells, including diagonally. Symbols are not on the numbered squares.

Smaller example with two symbols:

Puzzle: