Fill in the grid so that every row, every column and 3x3 box contains the digits 1 through 7 and two ship parts. So there are 18 ship parts for total. The ships are destroyer (2 unit ships) and submarines (1 unit ships). Ships cannot be adjazent to each other, not even diagonally. The numbers around the grid tell you how many ships you can see in this line.

Locate the position of the five T-formss in the grid. The T-forms do not touch each other, even not diagonally. The numbers outside the grid indicate how many cells in that row or column contain parts of the T-forms. The T-forms can not occupy the cells with given digits. Fill the grid also that every row, every column and every 3x3 box contain the digits 1 through 9. The T-forms contain the numbers given right of the grid. The forms can be rotated, but to reflected.

Locate the position of a 10-ship fleet in the left grid. The shapes of the ships are shown at the bottom of the left grid. There is one 4x1 battleship, two 3x1 cruisers, three 2x1 destroyers and 4 1x1 submarines. The numbers around the left grid indicate the number of cells occupied by ships in each row or column. Ships may touch the edge of the board, but cannot touch each other, not even diagonally. Additional each cell in the right grid 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. The numbers in the cages of the right grid are the sum of the cells in the cages. Cells with ship parts in the corresponding left grid can only contain odd numbers.

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.

Locate the position of the 10-ship fleet in the grid. The ships do not touch each other, even not diagonally. The numbers outside the grid indicate how many cells in that row or column contain parts of ships. The ship can not occupy the cells with given digits. Fill the grid also that every row, every column and every 3x3 box contain the digits 1 through 9. The ships contain the numbers given right of the grid. These numbers go from left to right, from right to left, from top to bottom or from bottom to top.

Locate the position of the 3 tanks of 7 cells in the grid. The tanks do not touch each other, even not diagonally. Numbers indicate the total number of tank cells in their row and column. Tanks can not cover cells with numbers. To cells are marked to be empty.

Locate the position of the 10-ship fleet in the grid. The ships do not touch each other, even not diagonally. The numbered squares are lighthouses, and indicate the total number of ship parts that are in the same row or column as the lighthouse. Ships can not touch the lighthouses, not even diagonally.

Locate the position of a 6-ship fleet in the grid. The shapes of the ships are shown to the right of the grid. There is one 3x1 cruisers, two 2x1 destroyers and 3 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. One cell is known to be water.

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. Some cells are known to be water.