Edward O. Thorp - Pioneer of Blackjack Literature

There's a strong chance that the average person on the street has never heard of Edward O. Thorp. For those who engage in blackjack or hedge fund management on a regular basis, however, his name may loom as large as anyone else in those fields of endeavor.

If you fall into the former category, it's our hope that this Edward Thorp biography can familiarize you with one of the titans of statistical gambling. For those who already have a basic knowledge of the man, our detailed biography of his life is sure to present some facts that have previously slipped between the cracks. In either case, you should come away from this article with a newfound appreciation for a true pioneer.

Early Years

Edward Oakley "Ed" Thorp was born in Chicago, Illinois on August 14th, 1932. His father was a veteran of World War I, and the senior Thorp had met his future bride after returning home from combat.

Thorp's father was a strong proponent of education, and he worked hard to make sure his son would have a solid foundation of knowledge to draw upon throughout his life. The benefits of the elder Thorp's efforts were evident early on, as Edward could mentally calculate the number of seconds in a year by the age of seven.

When America entered World War II, Thorp's father was once again called upon to serve his country. The absence of the family breadwinner created difficulties when it came to paying the bills, so Edward's mother took a job at Douglas Aircraft to make ends meet.

With his father gone and his mother working, the only child of the Thorp family was left with lots of free time. Instead of getting in trouble, however, he pursued a diverse number of hobbies ranging from making explosives (and detonating them) to playing chess with opponents via a HAM radio.

His father managed to survive yet another world war, and the elder Thorp relocated his family to Lomita, California when Edward was 10. Ed's desire for knowledge and overall intellect continued to flourish, despite being enrolled in a school that was rated as one of the worst in the area.

Higher Education and Teaching

After graduating from high school, Thorp used his overall intellect and keen talent for math to gain acceptance to UCLA. He received his bachelor's degree in physics in 1953, and this was followed by a master's degree in 1955.

He then set his sights on a doctoral degree in mathematics, and during this period he became interested in the math associated with gambling (specifically roulette). He decided to dispute the long-held notion that games of chance couldn't be beat.

Thorp received his PhD in mathematics in 1958, and he began working as a professor at MIT the following year. He held this position until 1961, when he transferred to New Mexico State University and taught mathematics until 1965.

At this stage, Thorp began his long affiliation with the University of California, Irvine. He taught mathematics at the college from 1965 to 1977, and then became a professor of both mathematics and quantitative finance from 1977 to 1982.

A Wearable Computer

While teaching at MIT, Thorp continued his fascination with using mathematics to crack the secrets of gambling. He spent hours observing the various games, and he noted one element that stood out above all others. In a game such as roulette, each spin was independent of one another, which meant that the odds were the same regardless of when or where it was played. Blackjack, however, had odds that varied, as cards being dealt from a deck altered the probability for future hands (at least until the deck was reshuffled).

Around this time, Thorp read an article about blackjack strategy in a statistical journal. This further fanned the flames of interest, and he decided to take his wife on a trip to Las Vegas. While the couple enjoyed modest success at the blackjack table, Thorp left convinced that a perfect system of play existed. All it required was someone to come along and discover it.

To help in his initial efforts, Thorp used two main tools. The first was an IBM 704 computer, which Thorp was able to operate after teaching himself the computer language known as FORTRAN. The second was the Kelly criterion, a formula developed in 1956 by J.L. Kelly, Jr. to determine the ideal size of a series of wagers.

As his research intensified, he brought fellow mathematician Claude Shannon on board. Claude and his wife would accompany the Thorps on trips to Vegas, and this led the two men to create the first pocket-sized computer for the purpose of advantage play (which is now illegal under modern-day casino rules).

At the time, a deck of cards wasn't reshuffled after every hand, so it was much easier to keep track of which cards had been played and which remained. This was a major factor in helping Thorp create his system, and casinos later adopted a policy of shuffling after every hand in order to combat would-be card counters.

Following careful research and analysis, Thorp created several strategies that he felt provided the player with a stronger chance of winning. His favorite was known as the 10 Count System, and it's explained in the following section.

The 10 Count System Explained

First presented in Edward Thorp's book, Beat the Dealer, the 10 Count System is a method that allows players to increase their odds of winning while playing blackjack. It's by no means the earliest example of a card counting system, but it's notable for being the first made widely available to the general public. The importance of this fact can't be overstated, as it opened up gambling and the game of blackjack to a whole new pool of players.

The system is meant to be used with a single deck of cards, and the goal is to reduce the house edge by placing larger wagers when the player has a greater chance of achieving a valuable hand. Counting begins when a fresh deck of cards is dealt, and the player is tasked with assigning a numerical value to each face-up card on the table.

If a card is worth 10 points in blackjack, then Thorp's system assigns it a value of negative nine. All other cards, meanwhile, are given a value a four. As the player keeps a running count of the cards, they can get an idea of when they have the best chance to receive a 10-point card. For example, a count of zero indicates that there are 2 1/2 4-point cards for every 10-point card in the deck.

While this system is effective for single-deck games of blackjack, there's simply too much variation when it comes to larger decks. Las Vegas initially tried to counter the 10 Count System by introducing new rules, but players rebelled and refused to play these games.

Instead, the casinos eventually started introducing games with multiple decks dealt from a shoe, and they were able to convince players to accept these changes over time. This has rendered Thorp's system largely ineffective for most modern forms of 21, although it would become the basis for more advanced methods of play over the decades.

Taking on the Casinos

Armed with a winning strategy, Thorp was ready to put his research to the test by making a serious run at the casino blackjack tables. He understood bankroll management quite well, however, and he therefore realized he would need someone to bankroll him.

He found his financial backer in Manny Kimmel, a respected gambler with lots of money and possible connections to the mafia. Another individual may have also been present, but the exact details tend to vary from one source to the next. Kimmel wasn't named directly in Beat the Dealer, instead being given the moniker of "Mr. X."

The first stops on their trek were Reno and Lake Tahoe, and Thorp had been given a $10,000 investment to play with, courtesy of his newfound partner(s). One of the main destinations was a now-defunct Reno casino known as Harold's Club, and Thorp managed to win $500 within 15 minutes using his system. While the system didn't always work, he wound up with an $11,000 profit by the end of the weekend. After that, he never had to ask Kimmel for another penny.

Thorp eventually moved on to Las Vegas, but his ability to rack up significant wins drew the attention of eagle-eyed security agents. This got him ejected from a number of Vegas casinos, and Thorp had to resort to a number of disguises to keep gaining admittance. In fact, he soon adopted the practice of carrying a notebook on his trips, allowing him to keep track of his various affectations and disguises. In addition to blackjack, he put together a baccarat team that enjoyed a respectable amount of success during this period.

Beat the Dealer: A Winning Strategy for the Game of Twenty-One

Word of Thorp's system and exploits soon spread throughout the close-knit community of serious gamblers, and the mild-mannered professor was inundated with requests for his secrets. Thorp had always enjoyed the intellectual challenge more than the financial benefits, so he decided to put his thoughts and theories into book form and make it available to anyone who was interested.

The first edition of Beat the Dealer was published by Vintage Books in 1962. The tome clocked in at over 200 pages, and it was packed with everything from card counting systems to tips on how to recognize cheating.

Instead of undergoing the usual peer review process for an academic work, Thorp simply released it onto the market. Some wondered if the mob might respond by sending a hitman to assassinate Thorp, but nobody resembling Joe Pesci ever materialized. Beat the Dealer went on to sell more than 700,000 copies and make the New York Time Bestseller List, a remarkable feat considering that gambling was such a niche category in the 1960s.

Despite the success of the book, however, a number of critics argued that the strategies presented were difficult to apply in real-world situations. Ever the serious academic, Thorp took these criticisms to heart and set out to further refine his ideas. Luckily, he would get some serious help in the form of fellow egghead Julian Braun.

Julian Braun and Hi-Lo Card Counting

The publication of Beat the Dealer drew attention from a lot of individuals, but one of the most notable was IBM computer programmer Julian Braun. The mathematician and former Marine wrote to Thorp and requested a copy of his blackjack computer program, which Edward was happy to provide.

Braun used an IBM 7044 mainframe computer to further refine the strategies laid out by Thorp, running 9 billion blackjack simulations in the process. Over the next four years, Braun perfected the Hi-Lo Blackjack System, which was more accurate that Thorp's original 10 Count System.

When Beat the Dealer was offered in a revised form in 1966, Braun's Hi Lo System was included with the following quote from Thorp,

"Braun's detailed blackjack calculations, based on his extensions and refinements of my original computer program, are the most accurate in existence, and he has kindly allowed them to be used throughout this revised edition."

Like all forms of card counting, Hi-Lo requires the player to assign a specific value to each visible card. In this case, the values are as follows:

  • 2 through 6 = +1
  • 7 through 9 = 0
  • 10 through Ace = -1

This is known as a "balanced system," as the count of all cards in the deck equals zero. High cards are more beneficial to the player, so their value is set at -1. Low cards, meanwhile, benefit the dealer, so their value is set at +1. When the count is high, this means more high cards should exist in the hand, and therefore the player should place larger wagers.

To properly use the system, you must keep up with the running count and the true count. The former is just what it sounds like: a running total of the value of all cards played during a hand. The true count, meanwhile, allows the player to determine if they truly have an edge over the dealer.

In a single deck version of the game, the true count is determined by dividing the running count by the number of cards yet to be played. Unfortunately, it's almost unheard of to find a single-deck game of blackjack these days, so the player is now required to estimate the number of decks still in the shoe and divide this by the running count.

Additional Literary Works

While most gamblers and members of the general public remember Thorp for Beat the Dealer, he wasn't content to rest on his laurels as an author. He has penned a number of other works, and all of these are still in print.

  • A Man for All Markets: From Las Vegas to Wall Street, How I Beat the Dealer and the Market (2017)

    A comprehensive look at Thorp's life, from his time as a card counter to his career as an investor.

  • A Winning Bet in Nevada Baccarat (2013)

    A re-publication of a 1963 research journal article entitled "A Favorable Side Bet in Nevada Baccarat."

  • The Mathematics of Gambling (1984)

    An analysis of gambling games such as blackjack, baccarat, and backgammon, as well as tips on proper money management. Most of the items in this book are reprinted columns that Thorp wrote for Gambling Times magazine.

  • Beat the Market: A Scientific Stock Market System (1967)

    Thorp takes his skills at mathematics and analysis and applies it to the world of investing.

  • Elementary Probability (1966)

    A scientific text on mathematics and probability.

In addition to the books listed above, Thorp has written a wide range of academic papers on game theory, functional analysis, and probability.

Investment Wunderkind

After Beat the Dealer became a sensation, Thorp found it increasingly hard to enter a casino without being spotted and ejected by security. He therefore decided to take a break from the world of gambling, turning his attention instead to investing.

Working alongside Sheen Kassouf, Thorp used his knowledge of statistics and analysis to find and locate pricing anomalies in the securities market. This led to the invention of delta hedging, as well as the creation of what's now known as the Black-Scholes formula.

In 1967, Thorp published his findings and advice in a book titled Beat the Market. While it didn't sell as well as Beat the Dealer, it had a major long-term impact on the world of investing. Two years later, Thorp and partner Jay Regan would launch the first market-neutral derivatives based hedge fund (known as Princeton/Newport Partners).

While still teaching, Thorp founded Edward O. Thorp & Associates, which he continues to run as of this writing. His first hedge fund returned 15.1% over 19 years, while his overall personal investments have yielded an average return of 20% for 28.5 years (as of 1998).

Induction into the Blackjack Hall of Fame

In 2002, it was decided that the Blackjack Hall of Fame would be created to honor the contributions of various men and women to the game of 21. The initial ballot was appropriately comprised of 21 players, experts, and authors, and voting was held in order to cull down the list. Casino owners and the general public were invited to participate, although those who derived their primary income from blackjack had the greatest influence on the voting process.

The first class of the Blackjack Hall of Fame was announced at the 2003 Blackjack Ball, which is always held in a secret location to elude minions of the casinos. A total of seven individuals were inducted, and Thorp was among those honored. The complete list included the following:

  • Edward O. Thorp
  • Ken Uston
  • Al Francesco
  • Stanford Wong
  • Tommy Hyland
  • Arnold Snyder
  • Peter Griffin


In 2003, Edward O. Thorp and his wife, Vivian, donated $1 million to the University of California, Irvine, to attract promising mathematicians to the college. According to Thorp,

"Vivian and I have greatly benefited from the knowledge I have acquired in mathematics and my association with the mathematical community. It's our chance to give back, in a modest way, to mathematics, mathematicians, and a great university."


As you might have guessed, Edward Thorp has used his mathematical genius to make himself a multi-millionaire. While his blackjack endeavors brought him a certain level of fame and a sizable return on Beat the Dealer, it was his transition to the world of investing that moved him up several tax brackets.

Now in his golden years, Thorp enjoys semi-retirement with his wife and family. His legacy in the world of gaming is assured, and he also enjoys the respect of his peers throughout the mathematics community. Not bad for a kid who used to pass the time by blowing things up.

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