In the late 1980s and 1990s, a small group of advanced players developed a technique that went beyond card counting. Shuffle tracking involves following clumps of cards through the shuffle and cutting them to a favorable position. When executed correctly, it provides a much larger edge than counting alone.
How it works
During play, a shuffle tracker identifies zones in the discard tray that are rich in high cards or low cards. After the shuffle, they track where those zones end up in the new shoe. By cutting the cards at the right spot, they can influence which cards come out in the first few rounds. If a clump of tens and aces comes early, the player bets big from the start.
The players who pulled it off
Professional players like James Grosjean and members of various Blackjack teams used shuffle tracking to devastating effect. Grosjean, who literally wrote the book on advantage play, combined shuffle tracking with card counting to gain edges reportedly exceeding 5% on some shoes. For context, card counting alone typically gives 0.5% to 1.5%.
Why it is nearly impossible today
Casinos responded by introducing automatic shuffling machines, more complex manual shuffles, and restricted cut card placement. Most modern six-deck games make shuffle tracking impractical. But the story illustrates a key point: the deeper you understand how cards move through the deck, the more edges you can find.
