As Johnson remembers it, the $800,000 hand started with him betting $100,000 and being dealt two eights. If a player is dealt two of a kind, he can choose to “split” the hand, which means he can play each of the cards as a separate hand and ask for two more cards, in effect doubling his bet. That’s what Johnson did. His next two cards, surprisingly, were also both eights, so he split each again. Getting four cards of the same number in a row doesn’t happen often, but it does happen. Johnson says he was once dealt six consecutive aces at the Mohegan Sun casino in Connecticut. He was now playing four hands, each consisting of a single eight-card, with $400,000 in the balance.

He was neither nervous nor excited. Johnson plays a long game, so the ups and downs of individual hands, even big swings like this one, don’t matter that much to him. He is a veteran player. Little interferes with his concentration. He doesn’t get rattled. With him, it’s all about the math, and he knows it cold. Whenever the racily clad cocktail waitress wandered in with a fresh whiskey and Diet Coke, he took it from the tray.

The house’s hand showed an upturned five. Arrayed on the table before him were the four eights. He was allowed to double down—to double his bet—on any hand, so when he was dealt a three on the first of his hands, he doubled his bet on that one, to $200,000. When his second hand was dealt a two, he doubled down on that, too. When he was dealt a three and a two on the next two hands, he says, he doubled down on those, for a total wager of $800,000.

It was the dealer’s turn. He drew a 10, so the two cards he was showing totaled 15. Johnson called the game—in essence, betting that the dealer’s down card was a seven or higher, which would push his hand over 21. This was a good bet: since all face cards are worth 10, the deck holds more high cards than low. When the dealer turned over the house’s down card, it was a 10, busting him. Johnson won all four hands.

Johnson didn’t celebrate. He didn’t even pause. As another skyscraper of chips was pushed into his skyline, he signaled for the next hand. He was just getting started.

The headline in The Press of Atlantic City was enough to gladden the heart of anyone who has ever made a wager or rooted for the underdog:

BLACKJACK PLAYER TAKES TROPICANA

FOR NEARLY $6 MILLION,

SINGLE-HANDEDLY RUINS CASINO’S MONTH

But the story was even bigger than that. Johnson’s assault on the Tropicana was merely the latest in a series of blitzes he’d made on Atlantic City’s gambling establishments. In the four previous months, he’d taken $5 million from the Borgata casino and another $4 million from Caesars. Caesars had cut him off, he says, and then effectively banned him from its casinos worldwide.

Fifteen million dollars in winnings from three different casinos? Nobody gets that lucky. How did he do it?