Paper Battleship: Rules, Setup & How to Play Without the Board Game

Introduction

Battleship is one of the most beloved strategy games of all time — and long before it was a board game with plastic pegs, it was played with nothing more than pencil and paper. The paper version is the original Battleship, dating back to at least World War I, when it was played by soldiers and sailors as a way to pass the time. The commercial board game by Milton Bradley (now Hasbro) did not appear until 1967, meaning the paper version has nearly a century’s head start.

The concept is brilliantly simple. Two players each draw a grid representing an ocean, secretly position a fleet of ships on it, and then take turns calling out coordinates to “fire” at each other’s hidden ships. A hit is marked, a miss is marked, and gradually, through logic, deduction, and a bit of luck, you hunt down and sink your opponent’s entire fleet. The first player to destroy all enemy ships wins.

What makes Paper Battleship special is its perfect blend of accessibility and depth. The rules can be explained in two minutes, making it ideal for children as young as six or seven. But beneath the surface lies genuine strategy — probability-based firing patterns, ship placement psychology, and a systematic hunt-and-target approach that can dramatically improve your win rate. Serious players treat Battleship as a logic puzzle wrapped in a game.

Best of all, Paper Battleship requires absolutely no purchase. Two sheets of paper, two pencils, and something to hide behind — a book, a folder, even a propped-up menu at a restaurant — and you are ready to play. This guide covers everything: grid setup, ship placement, firing rules, and the strategic principles that will help you sink your opponent’s fleet faster than they can find yours.

What You Need

Paper Battleship is one of the most accessible two-player games ever invented. Here is everything you need:

• Two sheets of paper — one for each player. Each player will draw two grids on their sheet. Graph paper is ideal because it provides ready-made grid lines, but any paper works fine.
• A pencil or pen for each player — pencils are slightly better because you may want to erase mistakes. Some players use two colours: one for hits and one for misses.
• A screen or barrier — you need something to prevent players from seeing each other’s grids. A hardcover book stood upright, a large folder, a binder, or even a box lid works perfectly. In a pinch, players can sit back-to-back.

That is it. No board to buy, no pieces to lose, no batteries required. Paper Battleship can be played at a desk, a restaurant table, on an aeroplane tray table, or anywhere two people can sit with a writing surface between them.

Setup

Setting up Paper Battleship takes about 5 minutes and involves drawing grids and placing your fleet.

Step 1: Draw Your Grids

Each player draws two 10×10 grids on their sheet of paper. Label the columns A through J across the top and the rows 1 through 10 down the left side. This creates 100 cells in each grid, each identified by a unique coordinate (e.g., A1, B7, J10).

• Ocean Grid (left) — This is where you place your own ships. It represents your section of ocean.
• Tracking Grid (right) — This is where you record your shots against your opponent. You mark hits and misses here to keep track of what you have found.

Step 2: Place Your Fleet

Each player secretly places five ships on their ocean grid. The standard fleet consists of:

That is 17 cells occupied across 100 — meaning 83% of the grid is open water. Place each ship by filling in consecutive cells in a straight line, either horizontally or vertically. Ships may not be placed diagonally.

Placement rules:

• Ships must fit entirely within the 10×10 grid — no hanging off the edge.
• Ships cannot overlap — each cell can contain at most one ship.
• Ships can touch each other (be placed in adjacent cells) under standard rules. Some house rules require a one-cell gap between ships.

Mark each ship on your ocean grid using its first letter: C for Carrier, B for Battleship, R for Cruiser, S for Submarine, D for Destroyer. This makes it easy to tell which ship is where as the game progresses.

Step 3: Set Up the Screen

Place a barrier between the two players so neither can see the other’s grids. A hardcover book, a binder, or a large folder stood on its edge works well. Make sure both players can comfortably see their own two grids without the opponent catching a glimpse. The secrecy of ship placement is fundamental to the game.

How to Play

1. Decide who goes first Flip a coin, play rock-paper-scissors, or agree on any method. Going first provides a small statistical advantage (roughly one extra shot before the game ends), so some competitive players alternate who goes first between games.
2. Call out a coordinate On your turn, announce a single coordinate — for example, “B7.” This represents your shot — the cell in the ocean where you are firing.
3. Opponent announces the result Your opponent checks cell B7 on their ocean grid. If a ship occupies that cell, they say “Hit!” If the cell is empty water, they say “Miss.” Honesty is essential — lying about hits and misses ruins the game.
4. Record the result On your tracking grid, mark the cell: use an X for a hit and an O (or small dot) for a miss. Your opponent should also mark the cell on their ocean grid (e.g., by circling it or marking it with a slash) to track damage to their own ships.
5. Announce sunk ships When every cell of one of your ships has been hit, you must announce: “You sank my [ship name]!” For example, “You sank my Destroyer!” This tells the attacker the size of the ship they just destroyed, which is valuable tactical information.
6. Alternate turns Players take turns, one shot per turn, regardless of whether the previous shot was a hit or miss. (Some house rules give a bonus shot for a hit — agree on this before starting.)
7. Win by sinking all five ships The game ends when one player has sunk all five of the opponent’s ships. That player wins. In a well-played game, this typically happens after 40–70 total shots between both players.

Recording Your Shots: Notation Guide

Keeping clean, accurate records is essential for good Battleship play. Here is the recommended notation:

• X = Hit (you struck a ship)
• O or · = Miss (open water)
• / = Hit on your own ocean grid (mark the cell of your ship that was hit)

After several turns, your tracking grid will fill up with X and O marks, forming a picture of where your opponent’s ships are (and are not). Clean notation helps you spot patterns and plan your next shots strategically rather than randomly.

Strategy: From Random Firing to Systematic Victory

The difference between a novice and an expert Battleship player is enormous. A beginner fires randomly and takes 80+ shots to win. An expert uses systematic strategies and can find all ships in under 50 shots. Here are the key strategic concepts.

The Two Modes: Hunt and Target

All good Battleship strategy is built on switching between two distinct modes:

• Hunt Mode — You are searching for ships. Your goal is to find the first hit as efficiently as possible by firing at cells that maximise your chances of hitting something.
• Target Mode — You have found a hit and are now systematically firing at adjacent cells to determine the ship’s orientation (horizontal or vertical) and sink it completely. Once the ship is sunk, you return to Hunt Mode.

Beginners stay in Hunt Mode even after getting a hit, randomly firing elsewhere instead of following up. This is the single biggest mistake you can make. Always switch to Target Mode immediately after a hit.

The Checkerboard Pattern (Hunt Mode)

The most efficient Hunt Mode strategy is the checkerboard pattern. Imagine the grid coloured like a chessboard, with alternating dark and light cells. Since the smallest ship (Destroyer) occupies 2 cells, it must always cover at least one dark cell and one light cell. Therefore, by firing only at cells of one colour (say, all the “dark” cells), you can search the entire grid for ships using only 50 shots instead of 100.

Once you have exhausted the checkerboard and believe all remaining ships are found, you can switch to the other colour to catch anything you missed. But in practice, you will score enough hits through the checkerboard to switch to Target Mode well before firing all 50 shots.

Target Mode: Follow the Hit

When you score a hit in Hunt Mode, immediately switch to Target Mode. Here is the systematic approach:

1. Fire at an adjacent cell — Pick any of the four cells directly adjacent to the hit (up, down, left, right). If that shot is also a hit, you now know the ship’s orientation.
2. Follow the line — Continue firing in the same direction until you miss. This gives you one end of the ship.
3. Reverse direction — Go back to the original hit and fire in the opposite direction until you miss or the ship sinks.
4. Check for sinking announcement — When the opponent says “You sank my [ship]!” you know the ship’s size. Make sure the number of hits matches the ship size. If not, two ships were adjacent, and you need to investigate further.

Probability-Based Firing

Advanced players go beyond the simple checkerboard and think about probability. The idea is to fire at the cells where ships are most likely to be hiding, given what you already know about the board. Key principles:

• Centre cells are higher probability than edges. A ship can be placed through a centre cell in many orientations; an edge cell limits options. Fire towards the centre of the grid early on.
• After each miss, update your mental model. A miss at D5 tells you that no ship passes through D5 — which reduces the number of ways ships could be positioned near that cell. Good players intuitively narrow down possibilities with each shot.
• Track which ships remain. If you have already sunk the Destroyer (2 cells), you know the smallest remaining ship is 3 cells. You can now space your Hunt Mode shots 3 cells apart instead of 2, further reducing the number of shots needed to search the grid.

Ship Placement Strategy

Strategy is not just about shooting — it starts with how you place your ships. Where you position your fleet can make you harder or easier to find:

• Avoid clustering. If all your ships are in one area of the grid, a single hit can lead your opponent to find everything quickly. Spread your ships across different regions.
• Edge placement is a double-edged sword. Ships along the edge are slightly less likely to be found by a centre-focused search pattern, but once found, they are easy to trace because the edge limits possible orientations. Mixing edge and interior placements is usually best.
• Vary between games. If you always place ships in similar positions, observant opponents will catch on. Randomise your placement each game.
• Consider touching ships. Placing two ships in adjacent rows can confuse your opponent when they enter Target Mode. They may think they are tracking one ship when they have actually hit two, leading to incorrect assumptions about ship orientation and size.
• Avoid the obvious. Many beginners place ships along the edges or in corners. Experienced opponents will check these spots first. Consider placing at least one ship in the middle of the grid where beginners rarely look.

Game Variations

Paper Battleship adapts easily to different house rules and variations. Here are the most popular ones:

Salvo Variant

Instead of one shot per turn, each player fires a salvo of shots equal to the number of their surviving ships. At the start, you fire 5 shots per turn (one for each ship). As ships are sunk, your salvo size decreases. This variant speeds up the game dramatically and rewards quick pattern recognition, since you must process multiple results simultaneously.

Bonus Shot for Hits

A popular house rule grants a bonus shot whenever you score a hit. This makes Target Mode more powerful and can lead to exciting chain reactions where a player sinks an entire ship in a single turn. The downside is that it increases the first-player advantage.

Hidden Fleet Size

In this variant, players do not announce which ship was sunk — they only say “Hit” or “Miss.” The attacker must deduce the ship sizes entirely from hit patterns. This is significantly harder and rewards careful tracking and deduction.

Larger Grids

For a longer, more strategic game, use a 12×12 or 15×15 grid and add one or two extra ships. A common expanded fleet adds a Patrol Boat (1 cell) and an Aircraft Carrier (6 cells). Larger grids favour methodical search strategies and make the Hunt phase more interesting.

Fog of War

In this variant, misses are not announced. The defender only says “Hit” when a ship is struck and stays silent otherwise. This removes a major source of information and makes the game significantly more challenging, as the attacker cannot use misses to narrow down ship positions.

The History of Battleship

Battleship’s origins trace back to World War I, when pencil-and-paper versions of the game were played by military personnel, particularly in the French and Russian armed forces. The game spread through military camps and schools in the 1920s and 1930s, appearing under various names: Sea Battle, Naval Combat, and simply Battleship.

The first commercial version appeared in 1931 when the Starex company published Salvo, a pad-based version of the game. In 1943, Milton Bradley released a pad-and-pencil version. But the game as most people know it today — with the iconic plastic boards, red and white pegs, and hinged carrying case — was released by Milton Bradley in 1967. That version became one of the best-selling board games of all time.

In 2012, Battleship was adapted into a Hollywood film (loosely based on the game’s naval combat theme). While the film received mixed reviews, it further cemented Battleship’s place in popular culture. Today, Battleship is published by Hasbro (which acquired Milton Bradley in 1984) and is available in dozens of variants, electronic editions, and mobile apps.

But the paper version remains the purest form of the game. No batteries, no plastic, no lost pegs — just two minds, two grids, and the ancient challenge of finding what your opponent has hidden.

Frequently Asked Questions