TrigammonX™ is the digital evolution of Trigammon™, the three-player strategy game first conceived in 1979 by William “Bill” Bailey and Dennis Angelica.
Trigammon began with a simple problem. Backgammon was a favourite evening pastime, but with three friends gathered around the board, someone was often left waiting for a turn. The solution was equally simple in concept: adapt the game so all three could play at the same time.
And so, Trigammon was born.
Over the years, prototype boards remained in private play while the rules and board design continued to evolve. As Dennis stepped aside from active development, Bill continued carrying the project forward, personally refining and funding it as resources allowed.
Efforts were also made to protect and advance Trigammon, including successful U.S. trademark registrations in 2003 and again in 2015. The ambition to bring the game to a wider audience never disappeared, although the cost of maintaining trademark protection and funding large-scale production kept that goal out of reach for many years.
From the Tabletop to Digital Play
In 2026, Trigammon entered a new phase of development. The physical board was redesigned and the rules revisited with a clear goal: keep Trigammon as close to traditional backgammon as practical, changing familiar rules only where necessary to make three-player play work.
At the same time, development continued on a digital counterpart designed to bring the Trigammon experience to computers, tablets and mobile devices.
That project is TrigammonX™.
TrigammonX is not intended to replace the physical game. It extends the same three-player concept into a digital environment where gameplay can be taught, tested and enjoyed in new ways.
What Makes TrigammonX Different?
Three-player backgammon creates challenges that simply do not exist in the traditional two-player game.
Each player must consider two opponents rather than one. Players travel through another player’s Inner Board, creating new strategic decisions around timing, blocking, hitting and risk. A move that improves your position against one opponent may also create an opportunity for the other.
TrigammonX brings those interactions into a digital environment while preserving the character of the physical game.
While other three-player adaptations of backgammon have appeared over the years, Trigammon has followed its own path since 1979. Carried forward and continually developed by Bill, it evolved around a distinctive three-player board and playing system designed specifically for three equal opponents.
Trigammon is, quite simply, Backgammon for Three.
Current Development
TrigammonX development currently explores features such as guided legal moves, automatic turn progression, player-oriented board views, computer-controlled opponents, selectable dice options, optional game variants and future multiplayer possibilities. These features remain subject to change as development and playtesting continue.
The goal is not simply to reproduce a board on a screen, but to create a digital version that can help players learn Trigammon, understand their legal moves and experience the strategy of three-player play.
One Game, Two Ways to Play
Trigammon™ is the physical tabletop game.
TrigammonX™ is its digital counterpart.
Both share the same history, three-player foundation and continuing development. The physical board remains at the heart of the project, while TrigammonX provides a path for that experience to grow into digital play.
Independent Development
Trigammon™ and TrigammonX™ are independently developed projects. They are not affiliated with, endorsed by or connected to other three-player backgammon games, variants, patents, publications or products that may use similar names or concepts.
Current Status
TrigammonX is currently in prototype and development. Public access and sales are not yet available. Initial development is based in Australia, with future availability to be determined as development, testing and legal review continue.
TrigammonX™ — Backgammon for Three, evolved for digital play.
Last updated: August 2026