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AI beats professionals in article source poker Date: July 11, 2019 Source: Carnegie Mellon University Summary: An artificial intelligence program has defeated leading professionals in six-player no-limit Texas hold'em poker, the world's poker ruins lives popular form of poker.
Share: An artificial intelligence program developed by Carnegie Mellon University in collaboration with Facebook AI has defeated leading professionals in six-player no-limit Texas hold'em poker, the world's most popular form of poker.
The AI, called Pluribus, defeated poker professional Darren Elias, who holds the record for most World Poker Tour titles, and Chris "Jesus" Ferguson, winner of six World Series of Poker events.
Each pro separately played 5,000 hands of poker against five copies of Pluribus.
The ability to beat five other players in such a complicated game opens up new opportunities to use AI to solve a wide variety of real-world problems.
For instance, most human players avoid "donk betting" -- that is, ending one round with a call but then starting the next round with a bet.
It's seen as a weak move that usually doesn't make strategic sense.
But Pluribus placed donk bets far more often than the professionals it defeated.
It's a matter of execution for humans -- to do this in a perfectly random way and to do so consistently.
Most people just can't.
It was playing some of the best players in the world.
He and Brown earlier developed Libratus, which two years ago decisively beat four poker pros playing a combined 120,000 hands of heads-up no-limit Texas click, a two-player version of the check this out />Games such as chess and Go have long served as milestones for AI research.
In those games, all of the players know the status of the playing board and all of the pieces.
But poker is a bigger challenge because it is an incomplete poker ruins lives game; players can't be certain which cards are in play and opponents can and will bluff.
That makes it both a tougher AI challenge and more relevant to many real-world problems involving multiple parties and missing information.
All of the AIs that displayed superhuman skills at two-player games did so by approximating what's called a Nash equilibrium.
Named for https://healthcareinsuranceplan.info/poker/pala-poker-review.html late Carnegie Mellon alumnus and Nobel laureate John Forbes Nash Jr.
Although the AI's strategy guarantees only a result no worse than a tie, the AI emerges victorious if its opponent makes miscalculations and can't maintain the equilibrium.
In a game with more than two players, playing a Nash equilibrium can be a losing strategy.
So Pluribus dispenses with theoretical guarantees of success and develops strategies that nevertheless enable it to consistently outplay opponents.
Pluribus first computes a "blueprint" strategy by playing six copies poker ruins lives itself, which is sufficient for the first round of betting.
From that point on, Pluribus does a more detailed search of possible moves in a finer-grained abstraction of game.
It looks ahead poker ruins lives moves as it does so, but not requiring looking ahead all the way to the end of the game, which would be computationally prohibitive.
Limited-lookahead search is a standard approach in perfect-information games, but is extremely challenging in imperfect-information games.
A new limited-lookahead search algorithm is the main breakthrough that enabled Pluribus to achieve superhuman multi-player poker.
Specifically, the search is an imperfect-information-game solve of a limited-lookahead subgame.
At the leaves of that subgame, the AI considers five possible continuation strategies each opponent and itself might adopt for the rest of the game.
The number of possible continuation strategies is far larger, but the researchers found that their algorithm only needs to consider five continuation strategies per player at each leaf to compute a strong, balanced overall strategy.
Pluribus also seeks to be unpredictable.
For instance, betting would make sense if the AI held the best possible hand, but if the AI bets only when it has the best hand, opponents will quickly catch on.
So Pluribus calculates how it would act with every possible hand it could hold and then computes a strategy that is balanced across all of those possibilities.
Though poker is an incredibly complicated game, Pluribus made efficient use of computation.
Pluribus computed its blueprint strategy in eight days using only 12,400 core hours and used just 28 cores during live play.
Superhuman AI for multiplayer poker.
Science, 2019; eaay2400 DOI: Carnegie Mellon University.
ScienceDaily, 11 July 2019.
AI beats professionals in six-player poker.
Retrieved January 4, 2020 from www.
July 15, 2019 A game-theory research using poker ruins lives intelligence may help treat cancer and other diseases, improve cybersecurity, deploy Soldiers and assets more efficiently and even win a poker.
In a historic result for the flourishing AI research community, the team.
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