Pluribus
Pluribus is a computer poker player and artificial intelligence system developed by Facebook AI Research and Carnegie Mellon University.
Pluribus is a computer poker player and artificial intelligence system developed by Facebook AI Research and Carnegie Mellon University. It became known in 2019 for defeating elite human professionals in six-player no-limit Texas hold'em, a major milestone in multiplayer imperfect-information games.
Background
Pluribus was developed as a research system to test whether AI could outperform humans in multiplayer poker, where players must act with incomplete information. It followed earlier work on heads-up poker bots such as Libratus.
Development and method
The project was led by researchers at Facebook AI Research and Carnegie Mellon University. Reports described training through extensive self-play and the use of counterfactual regret minimization and search to choose actions.
Performance against professionals
Researchers reported that Pluribus beat top human professionals in six-player no-limit Texas hold'em, including games with one bot against five humans and five bots against one human. The results were published in Science in 2019.
Significance
Pluribus was widely described as a breakthrough because multiplayer poker is more complex than one-on-one play and involves bluffing and hidden information. The work was framed as a proof of concept for broader AI research rather than a commercial product.
Key facts
- Pluribus is an AI poker bot built by researchers from Facebook and Carnegie Mellon University.
- It was designed for six-player no-limit Texas hold'em, a multiplayer version of poker with hidden information.
- In 2019, researchers reported that Pluribus defeated elite professional poker players over 10,000 hands.
- The system was presented as the first bot to beat humans in a complex multiplayer competition.
- The bot's success was described as a milestone in AI research on imperfect-information games.
Pluribus has indirect relevance to Canadian readers through its contribution to global AI research and to computer science work on imperfect-information games, an area of interest to researchers and industry in Canada.
Frequently asked questions
What is Pluribus?
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References
- Wikipedia — https://en.wikipedia.org/wiki/Pluribus_(poker_bot)Supports: Basic identification of Pluribus as an AI poker bot, its developers, game format, and 2019 release.
- BBC News — https://www.bbc.com/news/technology-48959931Supports: Describes Pluribus as a superhuman poker-playing AI and notes its ability to beat world-leading professionals.
- Science — https://www.science.org/doi/10.1126/science.aay2400Supports: Primary research article reporting Pluribus's performance in six-player no-limit Texas hold'em and its significance.
- Engadget — https://www.engadget.com/2019-07-11-facebook-and-cmus-poker-ai-beat-fives-pros-at-once.htmlSupports: Reports that Pluribus beat multiple professional players simultaneously and describes it as a milestone.
- Wired — https://www.wired.com/story/new-poker-bot-beat-multiple-pros/Supports: Explains the research context, method, and significance of Pluribus as a proof of concept.
- ResearchGate — https://www.researchgate.net/publication/334466645_Superhuman_AI_for_multiplayer_pokerSupports: Contains metadata and excerpts of the Science paper describing Pluribus's training and results.