How to Play Reversi

Reversi (also known by the brand name Othello) is a classic strategy game that follows one simple motto: "A minute to learn, a lifetime to master." The game is played on an 8x8 uncheckered board using 64 identical discs that are white on one side and black on the other.

Setup

Unlike many board games, Reversi starts with four discs already placed in the center of the board in a specific diagonal pattern:

- Two Black discs and two White discs.

- The standard setup places the discs at positions d4, e5 (Black) and d5, e4 (White).

- Black always moves first.

Making a Move

A move consists of placing a disc of your color on an empty square. However, you can’t just place it anywhere.

To make a valid move, you must "outflank" at least one of your opponent’s discs. This means:

- You place your disc so that there is a straight line (horizontal, vertical, or diagonal) of your opponent's discs between your new disc and another disc of your color already on the board.

- There must be no empty spaces between the outflanking discs.

Capturing (Flipping)

Once you place your disc and create an outflank, you flip all of the opponent's discs trapped in that line to your color.

- Multiple Lines: You can outflank your opponent in multiple directions at once with a single move. If you do, all captured discs in all directions are flipped.

- Chain Reactions: Flipping discs does not trigger a "chain reaction" for other lines. Only the discs outflanked by the newly placed piece are flipped.

Passing and Ending the Game

Mandatory Moves: If you have a legal move, you must take it.

Passing: If you cannot make a legal move (meaning you can't outflank any of the opponent's pieces), you must pass your turn. Your opponent keeps moving until you are able to make a move again.

The Finish: The game ends when:

- The board is completely full.

- Neither player can make a move (e.g., all pieces are now one color).

Winning the Game

The winner is the player who has the most discs of their color on the board at the end of the game.

Other Facts

While the games are virtually identical today, Reversi was invented in 1883 by two Englishmen (John W. Mollett and Lewis Waterman) who each claimed the other stole the idea. Othello, the trademarked version we know today, was branded in 1971 by Goro Hasegawa in Japan.

The name "Othello" was chosen by Hasegawa as a reference to the Shakespeare play. The black and white discs represent the internal conflict of the Moorish general, and the green board represents the "green-eyed monster" of jealousy mentioned in the script.

Unlike Go, which took decades for AI to master, Reversi was "solved" for high-level play quite early. In 1997 (the same year Deep Blue beat Kasparov), a computer program called Logistello defeated the reigning human world champion, Takeshi Murakami, with a score of 6–0.

In late 2023, computer scientist Hiroki Takizawa published a paper claiming that Othello is a solved game. With perfect play from both sides, the game ends in a draw.

In competitive play, certain opening sequences are so famous they have names. The most common is the "Brighton" opening. Because the game is so symmetrical, many of the first few moves are mathematically equivalent, but players still have their stylistic favorites.

Beginners are taught that corners are the most valuable squares because they can never be "flipped" back once occupied. However, expert players often engage in "corner sacrifices," deliberately giving up a corner to gain a more dominant position elsewhere on the board.

Reversi/Othello is incredibly popular in Japan, which has produced the vast majority of World Champions. It is sometimes taught in schools to help children develop spatial reasoning and long-term planning skills.

The game is famously fast-paced, but World Championship "blitz" games are on another level. Players often have only a few minutes for all their moves. The record for the fastest game ever played in a tournament setting is under a minute for both players combined.

While a draw (32–32) is mathematically possible, it is surprisingly rare in casual play. Because every move changes the board state so drastically, one player usually edges out the other by at least a few discs.

About PvP Reversi Online

A clean, fast, and distraction-free environment for the Classic Game of Strategy.

Our Mission

At PvP Othello Reversi, we believe that classic strategy games should be accessible to everyone, anywhere. Our mission is to provide a seamless, browser-based Reversi experience that requires no downloads, no account registrations, and no complex setups. Whether you are a seasoned strategist or a beginner learning how to outflank your opponent, our platform is designed for pure, unadulterated gameplay.

How It Works

Built using modern web standards (HTML5, CSS3, and Vanilla JavaScript), our "Local PvP" experience is perfect for several scenarios:

Key Features

- Authentic Ruleset: Includes full Reversi logic, automatic turn-skipping when no moves are available, and real-time score tracking.

- Responsive Interface: Optimized for all screen sizes. Play comfortably on a mobile phone or a large desktop monitor.

- Privacy-First & Lightweight: No heavy libraries, no invasive trackers, and no data collection.

About the Developer

PvP Reversi Online is a project by Droptool.org. We specialize in high-quality web utilities and interactive tools that solve simple problems with elegant, efficient code. Our goal is to keep the web fast and functional, one tool at a time.