Reversi Othello is a two-player abstract strategy board game built around one deceptively simple idea: place a disc so that your opponent’s discs are trapped between two of your own, then flip the trapped discs to your colour.
The rules are quick to understand, but the strategic decisions become considerably more demanding as the board fills. A move that flips several discs may be less useful than a move that flips only one if the latter improves your future position.
This guide explains the Reversi Othello rules, the relationship between Reversi and modern Othello, important strategic concepts, common beginner mistakes, and a practical framework for evaluating moves.
What Is Reversi Othello?
Othello is played by two players on an 8×8 board using 64 discs. Each disc has a light side and a dark side, with each player using one colour. Players alternate placing discs and flipping opposing discs that have been outflanked. The official objective is to finish with a majority of discs showing your colour.
The official Othello rules from the World Othello Federation provide the standardized rules for legal moves, capturing, passing, and determining the winner.
The game is easy to start because there are only a few fundamental actions:
1. Choose a legal empty square.
2. Place your disc.
3. Outflank at least one opposing disc.
4. Flip every opposing disc captured by the move.
5. Continue until neither player can move.
6. Count the discs showing each colour.
The interesting part is what happens between those steps.
Reversi vs Othello: Are They the Same Game?
The terms Reversi and Othello are closely connected, but their history is more nuanced than simply saying they are two unrelated games.
The World Othello Federation’s historical material traces earlier versions of the game to Reversi and related games, while identifying 1971 as the year Goro Hasegawa began manufacturing and selling Othello.
The federation’s historical account also explains that games with similar rules existed before modern Othello, including Reversi in England and Genpei-go in Japan. Modern Othello established its own name, design, and rules.
For someone learning the game today, the practical distinction is useful:
● Reversi is associated with the earlier history and versions of the game.
● Othello is the modern standardized game.
● Competitive Othello follows the rules maintained by the World Othello Federation.
So when someone searches for “Reversi Othello,” they are generally looking for the same fundamental outflanking-and-flipping style of play, but the standardized Othello rules are the safest reference for modern play.
How to Set Up an Othello Board
The standard Othello board contains 64 squares arranged in eight rows and eight columns.
The game begins with four discs positioned in the centre of the board: two black and two white, arranged diagonally. Black makes the first move.
The starting position is important because the first player does not have unlimited freedom. The initial move must create a valid outflanking capture.
From there, every move changes the board and therefore changes the legal moves available to both players.
How to Play Reversi Othello
1. Find a legal move
A legal move must outflank at least one opposing disc.
Suppose the board contains this simplified horizontal pattern:
Black – White – Empty
If you place a Black disc in the empty position, the White disc is trapped between two Black discs.
The result becomes:
Black – Black – Black
That White disc is flipped.
The same principle works vertically and diagonally. A single move can potentially create capture lines in multiple directions.
2. You cannot jump over your own disc
The opposing discs must form a direct line between the disc you place and an existing disc of your colour.
You cannot skip over one of your own discs to create a capture. The official rules specifically address this restriction.
3. All captured discs must be flipped
If your move creates valid outflanking lines in multiple directions, the discs captured by those lines must be flipped.
You cannot decide to leave a captured disc unchanged simply because doing so would appear strategically better.
4. Passing is not optional
If you have a legal move, you must make it.
If you have no legal move, your turn is forfeited and the opponent plays again.
This is strategically important because a player can sometimes benefit from restricting the opponent’s available moves.
5. The game can end before the board is completely filled
Play ends when neither player can make a legal move.
The official rules specifically note that the game can finish before all 64 squares are occupied. The discs are then counted, and the player with the majority of their colour showing wins.
Why Flipping More Discs Is Not Always Better
This is probably the most important strategic lesson for a beginner.
Imagine you have two legal moves:
● Move A: flips five discs.
● Move B: flips one disc.
It is tempting to choose Move A immediately.
But every flipped disc changes the position.
The five-disc move could:
● expose more of your discs,
● create additional legal moves for your opponent,
● remove a useful barrier,
● change access to an important square,
● or create a tactical opportunity for the opponent.
The one-disc move could potentially preserve a better structure.
Therefore, immediate disc gain should be treated as one evaluation factor rather than the entire strategy.
This is an analysis of the game’s mechanics, not a claim that smaller captures are always superior. The best move depends on the complete board position.
Important Othello Strategy Concepts
1. Mobility
Mobility is a useful way to think about the number of legal moves available to a player.
Suppose you can choose from several legal moves while your opponent has very few. You have more flexibility in deciding how to respond to the developing position.
This creates a practical habit:
Before choosing your move, look at what moves your opponent will have afterward.
Instead of asking only:
“What do I gain?”
also ask:
“What am I allowing?”
That question can reveal tactical problems that are invisible when you focus only on your own disc count.
2. Corner Control
Corners are among the most strategically important squares on an Othello board.
The reason is structural: there is no square beyond a corner on either relevant board direction. Once a disc occupies a corner, the opponent cannot outflank it from outside the board.
This makes corner occupancy fundamentally different from ordinary interior play.
However, “corners are good” should not become an automatic rule.
The important question is how a move affects access to a corner.
Before playing near an empty corner, examine:
● whether your move gives the opponent access to it,
● whether the corner can be taken immediately,
● whether your move changes an existing capture line,
● and whether the opponent can force you into an undesirable sequence.
The strategic value comes from control of corner access, not merely from physically occupying a nearby square.
3. Stable Discs
A stable disc is a disc that cannot be flipped for the rest of the game.
A corner provides the clearest example of a stable disc.
Stability creates an important distinction between:
temporary ownership and secure ownership.
You may have many discs showing your colour during the middle of the game, but if those discs can easily be flipped later, the visual advantage may not mean much.
This is why evaluating the quality of your position is more useful than repeatedly checking who currently has the larger number of discs.
4. Frontier Discs
A frontier disc is generally a disc positioned next to an empty square.
These discs are exposed to future interactions because empty neighbouring squares can provide opportunities for the opponent to create capture lines.
A useful practical question is:
How exposed are my discs to the next stage of play?
This does not mean that every frontier disc is automatically bad. Some exposed discs are necessary, and specific positions can make them useful. The point is to recognize exposure as another factor when comparing moves.
A Practical Reversi Othello Move-Evaluation System
Rather than memorizing a long list of disconnected tips, use this five-step process.
Step 1: Identify all legal moves
Scan horizontally, vertically, and diagonally.
Do not evaluate a move before knowing what alternatives exist.
Step 2: Check the opponent’s legal responses
After imagining your move, ask:
“What can my opponent do next?”
This is often more revealing than counting the discs you just flipped.
Step 3: Examine corner access
Check whether the move:
● takes a corner,
● gives the opponent a corner,
● creates future corner access,
● or blocks your own options.
Step 4: Examine disc exposure
Look at which discs become adjacent to empty squares and therefore potentially vulnerable to future captures.
Step 5: Compare the resulting positions
Only after examining these factors should you consider the immediate number of discs flipped.
This gives you a more balanced decision process:
Legal moves → opponent response → corners → exposure/stability → immediate gain
That ordering is a practical framework rather than an official scoring formula.
Common Beginner Mistakes in Othello
Taking the biggest capture
A large capture can feel like obvious progress.
But because every flip changes the board, the immediate gain may create opportunities for the opponent.
Instead of asking:
“How many did I capture?”
ask:
“What did those flips change?”
Focusing only on your own legal moves
Othello is a two-player game, so your move cannot be evaluated independently of your opponent.
If your move gives the opponent several attractive choices, the immediate benefit may be less valuable than it appears.
Treating every corner-adjacent square as bad
Squares around empty corners can be strategically sensitive, but their value depends on the exact position.
A useful principle should never become an absolute rule.
Assuming the current disc count tells the whole story
The official objective is determined at the end of the game. A temporary lead can disappear as discs are repeatedly flipped.
During the game, therefore, consider the position as a whole rather than treating the current score as the final result.
Playing without reviewing your mistakes
One of the simplest ways to improve is to revisit positions where the game changed dramatically.
For each important mistake, ask:
1. What move did I make?
2. What did I expect the opponent to do?
3. What did the opponent actually have available?
4. Did I overlook a corner or capture line?
5. Was there another legal move that produced a safer position?
This turns a lost game into something you can learn from.
Reversi Othello Strategy: A Simple Decision Table
| Factor | Question | What to Look For |
| Legal moves | What can I play? | All valid capture positions |
| Opponent mobility | What can they play next? | Strong responses and threats |
| Corners | Who can access a corner? | Immediate or future corner opportunities |
| Stability | Which discs are difficult to flip? | Corners and stable structures |
| Exposure | Which discs are next to empties? | Potentially vulnerable discs |
| Immediate gain | How many discs flip? | Short-term material change |
| Future position | What does the board become? | Overall strategic direction |
The value of this framework is that it prevents one attractive feature—such as a large capture—from dominating the entire decision.
How to Improve Your Othello Game
You do not need to memorize advanced theory immediately.
Start with three practical habits.
Practice recognizing legal moves
The faster you can identify valid capture lines, the more attention you can devote to strategy.
Review turning points
After each game, find two or three positions where the board changed significantly.
Try to understand why the position changed rather than simply noting which move lost.
Study established strategy material
Once the basic concepts are familiar, structured strategy resources can introduce more advanced terminology and positional ideas. The World Othello Federation hosts strategy material including “Othello: A Minute to Learn, A Lifetime to Master,” a book that progresses from basic rules toward more advanced concepts and exercises.
For beginners, this type of progression is useful because it separates learning the mechanics from learning deeper positional ideas.
The History Behind Modern Othello
The modern game did not appear in isolation.
The World Othello Federation’s historical account describes earlier Reversi-related games and identifies 1971 as the year Goro Hasegawa began manufacturing and selling Othello.
The organized competitive history developed later. According to the federation, the first Japan Othello Championship took place in 1973, while the first World Othello Championship was held in 1977. The World Othello Federation itself was founded in 2005.
This history helps explain why “Reversi Othello” is still such a common search phrase: the modern game grew from an older family of related board games while establishing its own standardized identity.
Is Othello Suitable for Competitive Play?
Yes. Othello has an established international competitive structure rather than existing only as a casual family board game.
The World Othello Federation maintains tournament information, player ratings and international competition. Its website also provides official rules and resources for learning the game.
For someone starting out, the useful takeaway is simple: learning the standard rules gives you a foundation that can carry from casual games into more structured competitive play.
Frequently Asked Questions
Is Reversi the same as Othello?
They are closely related games with the same fundamental outflanking concept, but modern Othello has its own standardized rules and history. The World Othello Federation documents the historical relationship between earlier Reversi games and modern Othello.
How many squares are on an Othello board?
The standard board has 64 squares arranged in an 8×8 grid. The game uses 64 discs.
Who goes first in Othello?
Black always moves first under the official rules.
Can I pass if I have a legal move?
No. If a legal move exists, you must make it. A turn is forfeited only when you cannot make a legal move.
Can one move flip discs in several directions?
Yes. A placement can outflank opposing discs in multiple directions, and all discs captured by that move must be flipped.
Does the game always end with all 64 squares occupied?
No. The official rules state that a game can end before all 64 squares are filled if neither player can make another legal move.
What is the best beginner strategy in Othello?
Start by looking beyond immediate disc gains. Check your opponent’s available moves, corner access, disc stability, exposure, and the position your move creates for the next turn.
Final Thoughts on Reversi Othello Strategy
The appeal of Reversi Othello comes from its unusual balance between simplicity and depth.
You can understand the fundamental rules quickly: place a disc, outflank your opponent, flip the captured discs, and continue until neither player can move. The difficult part is understanding how one move changes the possibilities several turns later.
If you are new to the game, focus on these ideas first:
● Learn every legal capture pattern.
● Do not judge a move only by the number of discs it flips.
● Watch your opponent’s mobility.
● Pay close attention to corner access.
● Distinguish stable discs from vulnerable ones.
● Review important turning points after each game.
The World Othello Federation’s official Othello rules are the best place to verify the formal rules, while its historical and strategy resources can help you move from basic gameplay toward deeper study.
The biggest strategic shift is simple: stop asking only what your move captures and start asking what your move makes possible next.
