Phil Ivey's £7.7M edge-sorting case, explained
Phil Ivey is one of the best poker players alive, with ten World Series of Poker bracelets. But the case that made him a fixture of law-school lectures had nothing to do with poker. Over two sessions in 2012 he won about £7.7 million at a London casino and roughly $9.6 million at one in Atlantic City, playing a game with no skill in it at all — baccarat, where the player makes no decisions once the bets are down.
He never marked a card, never touched the shoe, never used a device. He argued in open court that he had simply out-thought the casino, the same way an advantage player always does. Both courts disagreed and called it cheating. Understanding exactly why is the clearest way to see the line that card counting, famously, does not cross.
What edge sorting actually is
Edge sorting exploits a manufacturing flaw. The backs of some cheap playing cards are printed with a repeating pattern that isn't perfectly symmetrical top-to-bottom — the little diamonds along one long edge are cut a hair differently from the other. Turn such a card 180 degrees and, to a trained eye, its back looks subtly different. That difference leaks information: if you can get the deck arranged so that high cards face one way and low cards the other, you can read the value of the next card off its back before it is dealt.
In punto banco and baccarat the first card matters enormously, so knowing whether it is likely a 7, 8, or 9 is a genuine, sizeable edge. But the flaw does nothing on its own. To weaponize it, Ivey and his partner had to get the casino to physically turn specific cards for them.
How the sessions were run
Ivey played alongside Cheung Yin Sun, an advantage player nicknamed the 'Queen of Sorts,' who spotted the asymmetry and orchestrated the table conditions. Framing it all as high-roller superstition, they made requests the casino was happy to grant a whale betting six figures a hand: a specific brand of purple-backed cards, a Mandarin-speaking dealer, and — crucially — that the dealer rotate certain cards 180 degrees before dealing, supposedly for luck.
The last piece was the automatic shuffling machine. Unlike a hand shuffle, the machine kept each card's orientation fixed, so the sorted arrangement survived from one shoe to the next. Round by round the good cards got turned one way and the rest another. Within a few shoes Ivey was no longer making an even-money bet on a coin flip; he was betting with advance knowledge of the card about to appear, and his wagers climbed accordingly.
Two casinos, two lawsuits
Crockfords, the Mayfair club where he won £7.7 million, grew suspicious, reviewed the footage, and refused to pay. It returned only his £1 million stake. Ivey — remarkably — sued to force payment, betting that a court would agree he had merely used skill. He lost at trial, lost at the Court of Appeal, and in October 2017 lost at the UK Supreme Court in Ivey v Genting Casinos UK Ltd.
The Borgata in Atlantic City, where he and Sun won about $9.6 million at mini-baccarat using the same method, went the other way and sued him. A US federal court found he had breached the implicit contract to play by the rules of the game and ordered repayment; the judgment came to roughly $10.1 million. Same technique, two countries, two courts — and the same conclusion.
Why the courts called it cheating
Ivey's defence was that he was honest: he genuinely believed edge sorting was legitimate advantage play, and he never lied about the cards. The UK Supreme Court accepted he was honest in that sense and ruled against him anyway. Under the Gambling Act 2005, it held, cheating does not require dishonesty or an intent to deceive. What matters is whether you interfered with the game. By persuading the croupier to rotate the cards, Ivey had taken steps to fix the deck in his favour — he 'interfered with the process by which the game is conventionally played,' and that was cheating regardless of his sincerity.
The case became a landmark for a second reason: it also reset the legal test for dishonesty in England, replacing the older Ghosh test. But the gambling point is the one that matters here. The verdict didn't turn on whether Ivey was a nice person or a liar. It turned on a single fact — he changed the game's physical conditions to manufacture information the game was never meant to give up.
The line, and why counting stays on the right side of it
Set edge sorting next to card counting and the boundary snaps into focus. A card counter changes nothing about the game. Same cards, same shuffle, same rules, same dealer procedure — the counter just keeps a running tally of the cards everyone at the table has already seen and sizes bets to what's left. Every piece of information used is public and freely given off by the normal, unaltered play of the game. That's why courts and casinos treat counting as fair play, even as casinos are free to bar you for it.
Ivey did the opposite. He got the house to deal him a game it did not intend to deal — cards secretly sorted by his instruction. The tell wasn't the reading; it was the rearranging. (Baccarat, incidentally, is why our own /baccarat page tells you counting it doesn't pay: the game genuinely resists honest edges, which is exactly the pressure that pushes people toward dishonest ones.) The lesson for anyone who wants a real edge is the cheerful one: the legal edges are the ones where you outwork the game as it's actually played — memory, arithmetic, inference — and those are the ones worth practising.
Card counting is the edge that survives a courtroom: you change nothing about the game, you just do the math on cards everyone has already seen. That part is entirely trainable — and free.
Practice the legal edge →