# List of Battleships variants

There are a lot of Battleships variants. A huge list of Battleships variants is available on Moshe Rubin's (USA) website of Mountain Vista Software.[1]

### Squared Battleships

Appeared on WPC 2000/Part V, a Battleships variant round. The author of the puzzle was Erich Friedman (USA).

Locate the indicated fleet in the grid. Each piece of a ship occupies a single cell. A cell that does not contain a ship piece is considered "sea". Ships can be rotated. Ships do not touch each other, not even diagonally. The contents of some cells are given. Each number to the right and bottom of the grid reveals the number of ship pieces that must be located in that row or column.

Instead of a usual fleet consisting of 1xN rectangles, the puzzle uses a fleet consisting of NxN squares (as in a fleet shown right, N=3).

See Moshe Rubin's Mountain Vista Software website for an example puzzle.

### Path Battleships

Hybrid with Simple Loop. First appeared on 2002 US Qualifying Test. The puzzle was by Erich Friedman (USA).

Locate the indicated fleet in the grid. Each piece of a ship occupies a single cell. A cell that does not contain a ship piece is considered "sea". Ships can be rotated. Ships do not touch each other, not even diagonally. The contents of some cells are given. Each number to the right and bottom of the grid reveals the number of ship pieces that must be located in that row or column.

Additionally, draw a loop that traverses through all of the remaining cells not used by the fleet horizontally or vertically.

(Example (with a standard fleet of size 2) from 2002 US Qualifying IB)

### Myopia Battleships

First appeared on WPC 2016/Round 10, a Myopia-related variant round. The author of the puzzle was Matúš Demiger (Slovakia).

Locate the indicated fleet in the grid. Each piece of a ship occupies a single cell. A cell that does not contain a ship piece is considered "sea". Ships can be rotated. Ships do not touch each other, not even diagonally. The contents of some cells are given. Each number to the right and bottom of the grid reveals the number of ship pieces that must be located in that row or column.

The arrows point at all of the closest ship segments in the corresponding direction. No part of a ship can be placed in a cell already containing an arrow.

(Example (with a standard fleet of size 3) from WPC 2016 IB)

### Sky Battleships

Hybrid with Skyscrapers clues. First appeared on WPC 2018/Round 3. The puzzle was by Jiří Hrdina (Czech Rep).

Locate the indicated fleet in the grid. Each piece of a ship occupies a single cell. Ships can be rotated. Ships do not touch each other, not even diagonally. The contents of some cells are given to you.

The size of the ship is also its height. Each number to the right and bottom of the grid indicate how many ships are then visible in the given row/column as in the Skyscrapers clues.

(Example (with a standard fleet of size 3) from WPC 2018 IB)

### Battleships Pills

Although probably named in relation to Pills, the additional rules resemble more that of Banknotes. First appeared on WPC 2018/Round 6. The puzzle was by Jiří Hrdina.

Locate the indicated fleet in the grid. Each piece of a ship occupies a single cell. Ships can be rotated. Ships do not touch each other, not even diagonally. The contents of some cells are given to you.

The numbers on the top and on the left give the number of cells occupied by ships in the given row or column. The numbers at the bottom and on the right give the sum of the lengths of all the ship placed in the row or column.

(Example (with a standard fleet of size 3) from WPC 2018 IB)

### Ships and Fishermen

Hybrid with Anglers. First appeared on WPC 2018/Round 6. The puzzle was by Jiří Hrdina.

Locate the indicated fleet in the grid. Each piece of a ship occupies a single cell. Ships can be rotated. Ships do not touch each other, not even diagonally. The contents of some cells are given to you. Ships may not be placed on the cells with fish.

Each ship contains a fisherman (a number). Their position is given, but ships can be rotated. The number in the fisherman cell denotes the length of the fishing line. The fishing lines travel horizontally and vertically, may not touch or cross each other. All the cells are used either by ships, fish or fishing rods.

(Example from WPC 2018 IB)

### Gaps between Battleships

Hybrid with Gaps. First appeared on WPC 2018/Round 6. The puzzle was by Jiří Hrdina.

Locate the indicated fleet in the grid. Each piece of a ship occupies a single cell. Ships can be rotated. Ships do not touch each other, not even diagonally.

There must be exactly 2 ships in each row and column. The numbers on the top and on the left indicate the number of empty cells between the two ships in the given row/column.

(Example from WPC 2018 IB)