was six. Visitors to the Budapest family home of the successful Jewish banker
Max Neumann were as stunned by his son’s ability to memorize phone books as
by the jokes he told in classical Greek. When he grew older he studied chemical
engineering, physics, and mathematics at Europe’s finest universities: Berlin,
Zurich, Budapest, Göttingen. Soon the word was out: Von Neumann was a
genius. By 1930, at twenty-six, he was sitting in the room next to Albert
Einstein’s at the Institute of Advanced Studies in Princeton. Einstein’s mind, they
said, was “slow and contemplative. He would think about something for years.
Johnny’s mind was just the opposite. It was lightning quick—stunningly fast. If
you gave him a problem he either solved it right away or not at all.”
17
Unsolvable problems were rare, though. Living with his wife, daughter, and an
Irish setter, Inverse, at a Princeton mansion on 26 Westcott Road, von Neumann
was famous for hosting lavish weekly alcohol-fuming parties, and even more for
scribbling mathematical formulas with pencil and paper in the middle of it
all—“the noisier,” his wife said, “the better.” He wore prim, vested suits with a
white handkerchief in the pocket, “an outfit just enough out of place to inspire
pleasantries.” Von Neumann was balding and porky; his diet consisted of yogurt
and hard-boiled eggs for breakfast and anything he wanted for the rest of the day.
He loved fast cars, hard liquor, classical music, and dirty jokes. He was a
prankster. Once he offered to take Einstein to the Princeton train station and then
put him on a train in the opposite direction. He was known for scribbling
equations on the blackboard in a frenzy, erasing them before students could get to
the end. Klara, his wife, claimed that he wouldn’t remember what he had for
lunch, but could recall word for word books he had read twenty years before. He
had produced groundbreaking papers in logic, set theory, group theory, ergodic
theory, and operator theory. He had described the single-memory architecture of
the modern computer, and performed the crucial calculation on the implosion
design of the atom bomb. Along side these accomplishments, he loved toys and
was observed unaffectedly scrapping with a five-year-old over a set of building
blocks on a carpet. Though he was charming and witty in public, few felt that they
really knew him well. People joked that John von Neumann was not human but a
demigod who could imitate humans precisely.
18
Above all he was fascinated by games, especially the kind, like poker, based on
bluffing and deceit. “It takes a Hungarian to go into a revolving door behind you
and come out first,” he used to say. In fact John von Neumann loved games so
much that he had decided to study them, seriously, as a mathematician. What he
discovered amazed him: In games where two opponents were in absolute conflict,
where the loss of one is the gain of the other and only one side can ever win; in
such “zero-sum” games there is always an optimal strategy for both players to
pursue. Tic-tac-toe is the simplest example, but here is an illustration from life:
Imagine two sweet-toothed kids being given a cake and told to share it. When a
grown up carefully divides the cake down the middle, one side always feels