Locate the position of a submarine fleet in the grid. Each submarine needs one square in the grid. The number of submarines is not known The numbers beside the grid indicate the number of cells occupied by submarines in each row, while the numbers below the grid indicate the number of occupied cells in each column. Submarines may touch the edge of the board, but cannot touch each other, not even diagonally. Blue cells are known to be water.

Example:

Puzzle:

Locate the position of a 20-ship fleet in the grid. The shapes of the ships are shown to the right of the grid. There is two 4x1 battleship, four 3x1 cruisers, six 2x1 destroyers and 8 1x1 submarines. But in the grid is only a subset of this fleet. 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. Some cells are known to be ship parts.
There is only one solution. You can find it by logic.

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. But in the grid is only a subset of this fleet. 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. Some cells are known to be ship parts.

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 four 4x1 battleship, three 3x1 cruisers, two 2x1 destroyers and one 1x1 submarine. 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.

Locate the position of six dices in the grid. The patterns of the dices are shown to the bottom of the grid. Dices may touch each other, but they may not overlap. You can rotate the dices.

Smaller Example:

Puzzle:

Fill in the ships the digits from 1 through 9 so that the numbers in the rows and columns are the sum of the numbers of the ships in that row or column. Each number should be used only once.

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 4x4 battleship, two 3x3 cruisers, three 2x2 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.

Locate the position of the five tetris forms shown at the right side in the grid. The forms can be rotated or reflected. 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. One part is given. The cyan cells mark that in this cell no part can be.

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. Some cells are known to be ship parts. But in this variant it is not known whether they are middle or end parts.