Fill in the cube so that every outlined region and every layer (as shown by the double arrows) contains the digits 1 through 8.

Fill in the cube so that every outlined region and every layer (as shown by the double arrows) contains the digits 1 through 8.

Fill in the grid the digits 1 through 9 so that in every row, every column (even if it is not continous) and in cells of the same color no digit is repeated.

Fill in the grid so that every ring, antipod cell group pairs and cells of the same color contain the numbers 1 through 12.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. The sum of the connected pairs is 10.

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:

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.