Blog

Dive into our world of puzzle creation, game development insights, and the joy of problem-solving.

The Solver's Dozen: Twelve Evidence-Backed Rules for Better Puzzling

October 7, 20267 min read

A season of essays on the science, math, and history of solving, distilled to one page: twelve rules with receipts — from pigeonhole counting to walking away on purpose — that make any grid, and most problems, yield sooner.

The Brainteaser Interview: What Hiring Got Wrong About Puzzles

October 4, 20266 min read

For twenty years, tech companies hired people by asking why manhole covers are round. Then Google checked the data and called it "a complete waste of time." A puzzle site's honest take on what puzzles can and cannot tell you about a mind.

Dominosa and the Broken Chessboard

October 1, 20266 min read

Cut two corners off a chessboard and no arrangement of 31 dominoes will ever cover it — provable in two sentences, unbelievable until you see it. The coloring trick behind that classic powers domino puzzles, physics, and the art of proving "never."

God's Number Is 20: What the Rubik's Cube Taught Mathematics

September 28, 20266 min read

Any scramble of the 43-quintillion-position cube can be solved in 20 moves — never more. Proving it took thirty years, borrowed supercomputers, and a question named after God. The gap between 20 and how humans actually solve is the interesting part.

Why Explaining a Puzzle Out Loud Solves It

September 25, 20266 min read

Programmers confess their bugs to rubber ducks and the bugs surrender. Psychology has been documenting the trick since 1989 — plus the strange case where saying it out loud makes you worse.

Galaxies: The Puzzle Where Every Move Happens Twice

September 22, 20266 min read

Nikoli's "Tentai Show" is a bilingual pun — astral show, point symmetry — and a puzzle where each deduction instantly buys its mirror twin. On solving with symmetry, and why physics is played the same way.

The Ostomachion: Archimedes and the Oldest Puzzle We Know

September 19, 20266 min read

A prayer book sold at auction for two million dollars turned out to hide Archimedes' lost notebooks — including a 14-piece puzzle that may be the birth certificate of combinatorics. Its solution count took until 2003 to find: 17,152.

Futoshiki and the Arrow of Inequality

September 16, 20266 min read

Futoshiki means "inequality," and its little arrows never tell you what a cell is — only what it's bigger than. A guide to solving with chains, ceilings, and floors, and the branch of math that lives between the cells.

Desirable Difficulties: Why Comfortable Practice Makes Weak Solvers

September 13, 20266 min read

Fifty years of learning research converges on an uncomfortable law: the practice that feels most productive teaches the least. What testing, mixing, and struggling actually do — and how to aim your puzzle habit at growth.

The Crossword Contest That Recruited Codebreakers

September 10, 20266 min read

In 1942, a newspaper ran a puzzle speed contest — and the War Office quietly hired the winners. On Bletchley Park, the D-Day crossword panic, and why puzzle minds have always been weapons-grade.

Twenty Questions with Claude Shannon: How Much Is a Clue Worth?

September 7, 20266 min read

In 1948 an engineer who juggled on unicycles invented a unit for information itself. His "bit" explains why twenty questions can find one thing in a million, why cryptograms are crackable, and what a good puzzle clue actually does.

How a Computer Solves Sudoku (and Why It Does It Backwards)

September 4, 20267 min read

Your solver of choice cracks any Sudoku in milliseconds — but not the way you do. Inside constraint propagation, Knuth's dancing links, and the strange fact that the machine's hardest puzzle isn't yours.

Nurikabe: The Wall That Builds Itself

September 1, 20266 min read

Named for a ghost that blocks travelers on dark roads, Nurikabe asks you to flood a grid with one connected sea around numbered islands. Its secret: connectivity is a clue — some cells are black simply because nothing could ever reach them.

The Pigeonhole Principle: The Simplest Idea That Keeps Winning

August 29, 20266 min read

Ten pigeons, nine holes — some hole holds two. From this one observation: why two Londoners share an exact hair count, why no compressor shrinks everything, and why your best Sudoku moves were pigeonhole arguments all along.

KenKen: The Classroom Invention That Teaches Without Teaching

August 26, 20266 min read

A Tokyo cram-school teacher who refused to lecture invented a puzzle instead — "cleverness squared" — and it spread from his classroom to newspapers worldwide. The story, the philosophy, and the arithmetic that cracks it open.

The Einstellung Effect: When Experience Blocks the Answer

August 23, 20266 min read

In 1942, a psychologist showed that practice can make people worse at seeing easy solutions. Eye-tracking studies of chess masters later revealed the mechanism — your eyes literally keep returning to the idea you already had.

Why Puzzle Grids Are Square (and What Happens When They Aren't)

August 20, 20266 min read

Only three shapes can tile a flat plane by themselves, and puzzles overwhelmingly chose one of them. On the quiet geometry beneath every grid — bees, Kepler, and the hobbyist who found the "impossible" tile in 2023.

Light Up: The Puzzle Named After a Real Math Problem

August 17, 20266 min read

Nikoli called it "Art Gallery" — and mathematicians had been guarding art galleries since 1973. How a museum-security theorem, a three-color proof from The Book, and a grid full of light bulbs illuminate each other.

The Birthday Paradox and Other Lies Your Intuition Tells

August 14, 20266 min read

Twenty-three strangers in a room make a shared birthday more likely than not, and ten thousand letters — a thousand from PhDs — once insisted a correct probability answer was wrong. On the math our guts reliably get backwards.

Battleships: The Logic of the Hidden Fleet

August 11, 20266 min read

The guessing game from rainy afternoons has a solitaire cousin with no guessing at all — born in Argentina, adopted by the World Puzzle Championship, and secretly a masterclass in bookkeeping, water, and where big things can't fit.

The Four Cards Almost Everyone Gets Wrong

August 8, 20266 min read

Psychology's most famous logic test is four cards and one rule, and fewer than one person in ten solves it. The reasons we fail — and the one costume change that makes us all geniuses — explain what puzzle practice is really for.

The Tower of Hanoi and the Art of Thinking Recursively

August 5, 20266 min read

A French mathematician sold a toy in 1883 with a legend attached: when its 64 golden disks are finally moved, the world ends. The math says we're safe for 585 billion years — and the solution method quietly teaches recursion, the most powerful idea in problem-solving.

Skyscrapers: The Puzzle You Solve by Standing Somewhere

August 2, 20266 min read

Every clue in a Skyscrapers puzzle is a view down a street — count the buildings you can see and the skyline assembles itself. A field guide to vantage-point logic, plus the lovely mathematics of "records" hiding in the clues.

Four Colors, and the Proof No Human Has Ever Read

July 30, 20266 min read

A student coloring a map of England in 1852 asked a simple question that humiliated mathematics for 124 years — surviving a false proof that stood for a decade, and falling only to the first great computer-assisted proof in history.

Cheryl's Birthday and the Logic of What Other People Know

July 27, 20267 min read

In 2015, a homework question for Singaporean teenagers broke the internet. Its secret weapon — reasoning about other minds reasoning about yours — powers a whole genre of puzzles, and a surprising amount of computer science.

Knights, Knaves, and the Hardest Logic Puzzle Ever

July 24, 20266 min read

Raymond Smullyan — magician, concert pianist, logician — built an island of perfect liars and perfect truth-tellers, and used it to smuggle deep mathematics into party riddles. His tradition ends at a puzzle formally titled the hardest ever.

The Waiter's Memory: Why Unfinished Puzzles Won't Leave You Alone

July 21, 20266 min read

A 1920s psychologist noticed that waiters remembered orders only until the bill was paid. Her discovery — the Zeigarnik effect — explains cliffhangers, to-do list anxiety, and the strange gravity of a half-finished grid.

Minesweeper and the Million-Dollar Question

July 18, 20266 min read

The little grid that shipped with Windows turns out to contain one of the deepest open problems in mathematics. Inside Minesweeper's numbers: logic circuits, a $1,000,000 prize, and the honest truth about the 50/50 guess.

How to Read a Nonogram: The Arithmetic That Paints Pictures

July 15, 20266 min read

A nonogram looks like a picture waiting to happen, but it solves like arithmetic. One simple counting trick — overlap logic — unlocks almost every grid, and the reason it works says a lot about how information hides in plain sight.

The Fifteen Puzzle Hoax That Fooled America

July 12, 20266 min read

In 1880, a sliding-tile puzzle drove two continents to distraction — and America's most famous puzzlemaker spent decades claiming credit for a craze he never started, dangling a $1,000 prize he knew he would never pay.

Why the Answer Comes When You Walk Away

July 7, 20266 min read

You stare at a puzzle for ten minutes and see nothing. You come back the next morning and the move is simply there. That experience is real, measurable, and one of the best reasons to solve daily.

Six Sextillion Grids: The Mathematics of Sudoku

June 20, 20266 min read

There are 6,670,903,752,021,072,936,960 valid Sudoku grids, no puzzle can have fewer than 17 clues, and your morning solve is secretly graph theory. A tour of the mathematics hiding in 81 cells.

From Euler to Nikoli: A Brief History of the Logic Puzzle

June 3, 20266 min read

The grid you solved this morning is the descendant of an emperor's turtle, a mathematician's officers, a retired architect in Indianapolis, and a Tokyo publisher named after a racehorse.

What Daily Puzzles Do to Your Brain

May 16, 20266 min read

Brain training was oversold, then over-debunked. Here is what the research actually says about a daily puzzle habit — the real benefits, the honest limits, and why the daily part matters most.

What AI Actually Does in Game Development

April 29, 20266 min read

Artificial intelligence has been part of games since Pac-Man. Here is an honest tour of what it really does behind the scenes today — and what still belongs to human designers.

The Grid as a Garden

April 15, 20266 min read

A puzzle is not a battlefield to conquer. It is a garden to tend — a space where patience, attention, and care produce something orderly and beautiful from an initial tangle of possibilities.

When Stuck Is the Point

April 13, 20266 min read

We treat being stuck as a problem to escape. But the stuck moment — the pause before insight — is where the deepest learning happens. Being stuck is not the obstacle. It is the work.

The Language of Logic

April 11, 20266 min read

Logic is a language, and like any language, it must be practiced to become fluent. Puzzles are the conversation that makes you fluent in reasoning.

Puzzles and the Present Moment

April 9, 20266 min read

A logic puzzle demands your full attention. Not yesterday, not tomorrow — right now, this cell, this constraint. Puzzles are one of the few activities that reliably pull you into the present.

The Quiet Joy of Completion

April 7, 20266 min read

In a world of endless feeds and infinite content, there is something radical about finishing. A completed puzzle is a rare thing: a task with a definite end.

Thinking in Layers

April 5, 20266 min read

The best puzzle solvers do not think about one thing at a time. They think in layers — holding multiple constraints, multiple possibilities, and multiple levels of reasoning simultaneously.

Why Hard Puzzles Feel Good

April 3, 20266 min read

Difficulty is not the enemy of enjoyment. It is the source of it. The puzzles that challenge us most are the ones that satisfy us most deeply.

The Art of Starting Over

April 1, 20266 min read

Restarting a puzzle is not failure. It is the decision to approach a problem fresh, unencumbered by mistakes you have already learned from. Starting over is its own skill.

Constraints as Creative Freedom

March 30, 20266 min read

We think of constraints as limitations. But in puzzles and in life, the right constraints do not restrict creativity — they enable it by narrowing the infinite to the possible.

The Puzzle as a Mirror

March 28, 20266 min read

Every puzzle reflects your thinking back to you — your habits, your shortcuts, your blind spots. Solving is not just logic. It is self-observation.

The Map Is Not the Territory

March 26, 20266 min read

A puzzle grid is a simplified model of a complex logical space. Puzzles train us to build good mental models, test them, and revise them when they fail.

Small Wins and the Compound Effect

March 24, 20266 min read

Each cell you solve in a puzzle makes the next one slightly easier. This compounding mirrors life: small daily wins accumulate into something much larger than any individual effort.

The Space Between Moves

March 22, 20266 min read

The best puzzle solvers do not rush. They pause. They scan. They let the grid breathe. The deliberate pause before acting is where real thinking happens.

Lessons from an Empty Cell

March 20, 20266 min read

An empty cell in a puzzle is not nothing — it is potential. It holds every possible value until logic narrows it to one.

Why We Solve What We Do Not Need To

March 18, 20266 min read

No one needs to solve a Sudoku. There is no reward, no practical output, no one waiting for the answer. So why do millions of people do it every day?

The Elegance of Inevitability

March 16, 20266 min read

The most beautiful puzzles are the ones where the solution feels inevitable in retrospect — not obvious, but the only way it could have ever been.

Patience Is a Skill, Not a Virtue

March 14, 20266 min read

We treat patience as a character trait you either have or you do not. Puzzle solvers know it is something you practice.

The Myth of the Eureka Moment

March 12, 20266 min read

We romanticize the flash of insight, but breakthroughs are built incrementally — one small step at a time.

What Puzzles and Music Have in Common

March 10, 20266 min read

Both puzzles and music create tension and resolution — and both reward patience with moments of deep satisfaction.

The Case for Doing One Thing at a Time

March 8, 20266 min read

Multitasking is a myth. In a world of split attention, the ability to do one thing at a time is becoming a superpower.

Digital Campfires

March 6, 20266 min read

When millions of people solve the same daily puzzle, they participate in a collective ritual — a digital campfire we all gather around.

The Grammar of Grids

March 4, 20266 min read

Puzzle grids have their own visual language — a syntax of rows, columns, and regions that anyone in the world can read without speaking a word.

The Comfort of Constraints

March 2, 20266 min read

Freedom sounds appealing until you have too much of it. Logic puzzles reveal why limits are not obstacles — they are what make thinking possible.

The Paradox of Doing More

February 27, 20266 min read

AI promises to help us do more with less. So why does it feel like we are working more than ever?

The Quiet Satisfaction of Proof

February 21, 20266 min read

Every number you place in a logic puzzle is not a guess. It is a proof. And that feeling of certainty is rarer than you think.

The Universe Is a Logic Puzzle

February 17, 20267 min read

Galaxies, atoms, and Sudoku grids have more in common than you think. The universe runs on constraints — and so do the best puzzles.

How Puzzles Train Your Brain to See Patterns

February 14, 20266 min read

The more puzzles you solve, the more your brain learns to spot hidden structures — and that skill transfers far beyond the grid.

The Beauty of Elimination

February 12, 20266 min read

The most powerful move in a logic puzzle is not placing the right answer. It is crossing out what cannot be true.

The Lost Art of Thinking Slowly

February 10, 20266 min read

In a world built for speed, logic puzzles ask you to do something radical: take your time.

Why Simpler Rules Make Better Puzzles

February 8, 20266 min read

The best logic puzzles are not the ones with the most rules. They are the ones where a handful of constraints create surprising depth.

Logic Puzzles vs. Word Puzzles: Which Should You Play?

February 4, 20266 min read

Crosswords and Sudoku both call themselves puzzles, but they exercise different mental muscles. Here is how to choose.

Pencil Marks: The Secret Weapon of Expert Solvers

February 1, 20265 min read

The difference between struggling and solving often comes down to notation. Here is how experts keep track of what they know.

The Science Behind the "Aha" Moment

January 30, 20266 min read

That sudden flash of insight when a puzzle clicks is more than just satisfying — it is your brain at its best.

Understanding Puzzle Difficulty (And How to Choose the Right Level)

January 29, 20267 min read

Difficulty is more than grid size. Learn what makes a puzzle harder and how to pick the best level for your mood.

How to Build a Daily Puzzle Habit That Sticks

January 27, 20266 min read

Small routines beat big bursts. Here is a practical, low-friction way to turn puzzle solving into a daily ritual.

How We Ensure Every Puzzle Has a Unique Solution

January 25, 20267 min read

A behind-the-scenes look at the checks, tests, and design rules we use to guarantee fair, satisfying logic puzzles.

Why One Solution Is Great Puzzle Design

January 23, 20266 min read

A single valid solution makes puzzles fair, teachable, and satisfying. Here is why uniqueness matters and how designers achieve it.

Designing Holiday themed puzzles

December 27, 20256 min read

How we built Spooktober for Crowns: a seasonal event with its own leaderboard, bespoke puzzles, and an emoji-first design language that made every deduction feel like a tiny story.

Our New Streamlined Blogging System: Powered by Markdown!

May 10, 20254 min read

We've upgraded our blog! Discover how we're now using a dynamic Markdown-based system for faster, easier content creation and what it means for you.

Top 10 Must-Try Logic Puzzle Games for Enthusiasts

May 8, 20257 min read

Discover our list of the top 10 logic puzzle games that will challenge your mind, including favorites like The Talos Principle, Baba Is You, and our own unique offerings.

Top 10 Things to Consider When Designing Levels for Logic Puzzle Games

March 22, 20258 min read

Creating engaging and well-balanced levels for logic puzzle games is both an art and a science. Whether you're designing levels for Sudoku, Binary Sudoku, or other logic puzzles, these key considerations will help you craft experiences that challenge and delight players.

Puzzle Games: The Future of Educational Technology

March 11, 20258 min read

Explore how puzzle games are transforming education and why they should be part of every learning toolkit.

The Hidden Benefits of Playing Puzzle Games (From a Dev Who Builds Them)

March 8, 20257 min read

Discover the science-backed cognitive benefits of incorporating puzzle games into your daily routine.

Introducing Binary Sudoku Plus: Clean, Fair, Binary Logic

March 4, 20256 min read

Meet our latest puzzle game that challenges players to create perfect symmetry through strategic tile placement.

The Art of the Puzzle (And What We've Learned Building Them)

February 19, 20255 min read

Discover the fascinating world of puzzle design and how we craft engaging challenges that captivate players minds.

Aquarium Is Here: Water Logic With Zero Guessing

February 15, 20254 min read

We're excited to announce the release of Aquarium, our latest logic puzzle game that challenges players to solve water-filling puzzles.