Chess can be played at lightning-fast or classical speeds

Chess unfolds in three phases: opening, middlegame, and endgame

Strong play requires adapting across phases: developing pieces and controlling the center in the opening, using tactics and strategy in the middlegame, and applying precise calculation and king activity to convert advantages in the endgame.

Chess is played on an 8×8 board with 16 pieces per side

Chess begins with two players facing off on a checkered 64-square board. Each controls 16 pieces—king, queen, rooks, bishops, knights, and pawns—with the goal of checkmating the opposing king.

Chess is played by an estimated 600 million people worldwide

Chess remains one of the most popular games in history, with roughly 600 million players across the globe. The game thrives casually in homes, schools, and parks, while also sustaining robust online communities and professional tournaments.

The longest official chess game lasted 269 moves and over 20 hours

In 1989, Ivan Nikolić and Goran Arsović played a marathon 269-move match in Belgrade. Lasting more than 20 hours, the game ended in a draw.

GZA of Wu-Tang Clan says chess taught him strategy in life and music

In a VICE interview, rapper GZA revealed how speed chess sharpened his mind on tour and shaped his creative strategy. Chess, for him, is more than a game—it’s his framework for life.

There are more chess game variations than observable atoms in the universe

Mathematician Claude Shannon estimated there are 10 to the 120th power variations of chess games possible. Known as the "Shannon number," this is more than the estimated number of atoms in the cosmos.

Play a puzzle game where the speed of light is reduced to everyday speeds

In "Velocity Raptor," space and time warp as you make your way across a room of obstacles at "normal" speeds. Take advantage of these relativistic effects to solve puzzles involving clocks running at different rates and colors shifting as a result of your movement.

Chess traces its roots to chaturanga in sixth-century India

The earliest form of chess, known as chaturanga, emerged in India around the sixth century. The game simulated four divisions of the military—infantry, cavalry, elephants, and chariots—and laid the foundation for modern chess’ structure and strategy.

Trade and conquest carried chess into Europe by the 11th century

After spreading through Persia, chess traveled along Islamic military and trade routes into North Africa and Moorish Spain by the 10th century. By the 11th century, it had taken root across much of Europe, flourishing in courts and monasteries.

A 13-year-old Magnus Carlsen challenged Garry Kasparov in 2004

In 2004, prodigy Magnus Carlsen faced reigning world number one Garry Kasparov in a rapid game at age 13. Carlsen held a strong position and nearly defeated Kasparov, signaling the rise of a future world champion.

An 1844 chess match via telegraph anticipated the board game's online popularity.

FIDE has governed international chess since 1924

The Fédération Internationale des Échecs was founded in Paris in 1924 to unify global chess rules and competitions. Today, it oversees world championships, regulates ratings, and serves as the official governing body for millions of players worldwide.

Quantum computers use qubits to solve problems much faster than classical machines

Unlike regular computers, where each bit is either 0 or 1, quantum computers use qubits, which can simultaneously be both—allowing for massive parallel processing power. Google’s quantum processor once solved a problem in seconds that would have taken a supercomputer 47 years.

A Guardian writer turned midlife chess slump into an obsession

Journalist Stephen Moss embarked on a chess self-improvement journey described in "The Guardian." Not a how-to, but a reflection on loss, drive, and whether mastering chess can mean mastering oneself.

Magnus Carlsen became world champion at just 22 years old

Norwegian prodigy Magnus Carlsen won the World Chess Championship in 2013 at age 22, one of the youngest champions in history. He went on to dominate for a decade, peaking at an Elo rating (a modern measure of chess ability) of 2882—the highest ever recorded.

Arnold Schoenberg invented a variation of chess that mimicked geopolitics.

Hikaru Nakamura became a chess star both on the board and online

A five-time US champion, Hikaru Nakamura helped chess expand its popularity through streaming. His Twitch and YouTube audiences number in the millions, drawing younger fans and fueling the game’s surge in popularity worldwide.

Tennis can be played on clay, grass, hard court, or carpet

Tennis started on grass surfaces in England, but as the sport has grown, so have the surfaces used to play the game. This article details how each surface affects ball speed, bounce height, and player movement, and highlights which Major championship uses which surface.

There are about 1,300 active grandmasters worldwide today

The title of grandmaster, established by FIDE in 1950, is the highest honor in chess. As of 2025, roughly 2,000 players have achieved the permanent title—an elite group representing less than one percent of the world’s competitive chess players. Around 1,300 are active today.

Quantum computers can simulate nature more effectively than classical computers

Ordinary computers struggle to simulate quantum fields due to entanglement, but systems built from those elements can model the complexity. Systems using particle in more than two states—qudits—have successfully modeled 2D electromagnetic fields and done so more efficiently.

Brain training game creates long-lasting changes in the brain that may help protect against dementia.

'In life, unlike chess, the game continues after checkmate.'

- Isaac Asimov

The first chess game in space ended in a draw in 1970

Soviet cosmonauts Andriyan Nikolayev and Vitaly Sevastyanov played a game of chess against mission control while orbiting Earth aboard Soyuz 9 in 1970. The match ended in a draw—the first recorded game in space.

The first official World Chess Championship was held in 1886

The inaugural world championship took place across New York, St. Louis and New Orleans in 1886, where Wilhelm Steinitz defeated Johannes Zukertort. Steinitz became the first recognized world champion, establishing the modern era of organized competitive chess.

Bobby Fischer’s 1972 victory ended Soviet dominance of chess

In Reykjavik, American Bobby Fischer defeated Soviet champion Boris Spassky to claim the world title. The Cold War showdown drew global attention, breaking the USSR’s 24-year grip on the championship.

Play a game of 1440's Tetris.

GothamChess built the largest online chess audience in the world

International Master Levy Rozman, known as GothamChess, has more than 6 million YouTube subscribers and billions of views. His mix of tutorials, commentary, and humor has introduced millions of new fans to the game in the digital era. In this video, he discusses his decision to challenge Grandmaster Magnus Carlsen.

IBM's supercomputer Deep Blue beat chess superstar Garry Kasparov in 1997, marking a pivotal moment in the development of artificial intelligence.

Relive Bobby Fischer’s Cold War victory with 'Drunk History'

Comedy Central’s "Drunk History" retells Bobby Fischer’s 1972 win over Boris Spassky with irreverent humor. The sketch hilariously highlights how a chess match became a Cold War spectacle, turning Fischer into an unlikely American celebrity.

Classical mechanics describes the motion of and forces on everyday objects

Newton's laws form the core of classical mechanics, suitable for everyday objects and speeds. The term is relatively new, distinguishing the branch of physics from quantum and relativistic mechanics.

Every Kentucky Derby-winning horse

Racing a thoroughbred isn't just about riding a horse as fast as you can. There is a complex racing strategy that forces jockeys to balance aggression and patience, conserving energy for that final stretch. This Kentucky Derby Winners article explores the split-second decisions jockeys make during high-pressure races, the moves they make to outsmart their opponents, and the importance of connecting with their horse.

Quantum computers harness weird physics to explore unsolvable problems

Classical computers manipulate bits as either 0 or 1, but quantum computers use qubits to hold combinations of both, enabling new algorithms. This new approach could one day help with breakthroughs in medicine, chemistry, and AI.

The belief that classical music enhances intelligence is mostly incorrect

"The Mozart Effect" was based on a 1993 study by psychologist Francis Rauscher. Rauscher played a Mozart Piano Sonata for college students and then assessed their spatial reasoning, finding it improved for 10 to 15 minutes. The media ran with a simpler story: listening to classical music made you smarter.

The speed of electricity may refer to the movement of electrons, which is on the order of a fraction of a millimeter per second, or energy, which is near the speed of light.

'Staunton design' became the universal chess set in 1849

Introduced in London in 1849, Staunton chess pieces featured simple, uniform shapes that made every piece easy to recognize. Endorsed by champion Howard Staunton, the design quickly became the international standard and remains the only style approved for tournament play.

Explore (digitally) the Computer History Museum

When IBM’s Deep Blue supercomputer won its famous chess rematch with then world champion Garry Kasparov in May 1997, the victory was hailed far and wide as a triumph of artificial intelligence. But John McCarthy—the man who coined the term and pioneered the field of AI research—didn’t see it that way. An obituary about McCarthy—who passed in 2001—and his ideas.

The Hans Niemann scandal rocked chess in 2023

In 2022, GM Hans Niemann was accused by Magnus Carlsen of cheating—a controversy that led to an internal Chess.com report alleging Niemann "likely cheated" more than 100 times in online games.

Test your historical knowledge with this daily game that shows you 10 historical artifacts and asks you to guess their time period and place of origin.

Einstein’s theory of special relativity

Special relativity, formulated by Einstein, describes how space and time are linked for objects moving at constant speeds. It states that the speed of light is constant for all observers, leading to time dilation (moving clocks run slower), length contraction (moving objects shrink), and mass-energy equivalence (E = mc²). This video breaks down how motion and time are fundamentally related.

According to the special theory of relativity, because the passage of time depends on how quickly objects move through space, people will not agree on the order of events they observe if they are moving at different speeds.

Experimenting with space-time

Einstein's theory of general relativity—that mass literally bends space and time—can be difficult for the human brain to imagine. This interactive resource lets you create celestial objects, imagine their effect on space-time, and see how they interact with each other (best viewed on desktop).

José Raúl Capablanca lost only 34 games in his entire career

World champion from 1921 to 1927, Capablanca was famed for his near-invincible style and masterful endgames. His extraordinary record of just 34 lifetime losses across thousands of games earned him the nickname “The Human Chess Machine.”

MLB 2023 rules changes were the most dramatic alterations in decades, drastically speeding up the game.

Special relativity shows how motion at high speeds reshapes time, space, and energy

Einstein’s 1905 special theory of relativity revealed that the speed of light is absolute in the universe, forcing time and space to vary with one's speed. This idea led to the famous equation E=mc2, which shows that mass and energy are interchangeable.

IBM developed a benchmark to measure the usable performance of a quantum computer

Dubbed "quantum volume," the benchmark tests how well a quantum computer runs complex tasks. It stops when the computer can no longer correctly select the most likely answers, called "heavy outputs," more than two-thirds of the time.

Between 2019 and 2025, sales of board games jumped more than 30% in the US.

Purdue students' robot solves a Rubik's cube faster than most people can blink

The solution time of 0.103 seconds is a Guinness World Record. A robot created by Mitsubishi Electric engineers held the previous record of 0.305 seconds.

Improve your typing speed by retyping classic literature

Why practice with nonsense letters and syllables when you can retype full books you always wanted to read, from Jane Austen and Sir Arthur Conan Doyle to George Orwell and W.E.B. duBois. And it's free.

Visualize how data becomes organized through a variety of sorting algorithms

This interactive shows how different algorithms shift elements in a randomized set to order them from smallest to largest. By comparing the different procedures and their corresponding functions, users can explore how runtimes vary across algorithms that complete the same task.

Google’s quantum computer completes a 10,000-year task in about 3 minutes

Google used its 53-qubit processor on an extremely difficult problem for traditional computers to simulate to showcase quantum supremacy. IBM later challenged Google’s claim by arguing that its Summit supercomputer could solve the same problem in just 2.5 days using a more efficient method.