ChronoFive
A fun, daily history game where you get 5 events and have to guess the years that they occurred!
Events get harder as the puzzle goes on.
See how you do on the leaderboard!
puzzled.online
Just open and play a puzzle a day.
Hardest online puzzles
If you’re hunting for the hardest online puzzles, “brain busters” is a fun label, but searchers tend to be clearer than that. They want challenging logic puzzles, difficult deduction games, tough number games, and browser puzzles that demand more than a quick guess.
This page gathers the toughest-looking part of the puzzled.online catalogue and then orders it by rating. The result is a high-difficulty shortlist of logic, deduction, math, and spatial games that players have already responded well to.
Think of it as the serious end of the directory: less casual filler, more genuine head-scratchers.
Curated collection
Top-rated matches from the directory
Ratings and favourites work in this browser with anonymous sessions enabled.
Sections puzzle
Sections is a free daily number logic puzzle. You're given a grid divided into sections by thick bars, fill each section with numbers 1 through its length, no repeats. It's like Sudoku but with variable-sized groups.
Quackle
Fill a grid with ducks. Same-pond ducks must touch, different-pond ducks never can.
Sumrex
Place six non-touching rexes on the grid so their hidden digits sum to today's target. One puzzle, one solution.
Targle
Number puzzle with a twist: the target is given, the six-character equation that hits it is yours to find.
recall.
memorization game where you are shown words, you memorize them, and type back what you remember.
Infinite Puzzles
Practice your favorite professional networking brain teasers. Play unlimited, algorithmically generated grids of Crowns, Sun and Moon, Pathfinder, Rectangles, and Sudoku.
Pell Puzzles
Fill a 6x6 grid with 8 paths of lengths 1-8. Connect X to O for each path, avoiding 2x2 blocks and self-touching paths. Daily puzzle with timer.
Septonum
Daily mental math challenge
Sudoku
High quality, ads free, mobile friendly daily Sudoku game.
Summit
A daily number pyramid puzzle where you rearrange tiles so each number equals the sum of the two below it.
Tally
Fill the grid from the rack so every row and column adds up to its target.
Threezy
Threezy - a card puzzle game based on SET with daily challenges
Threezy
Threezy is a card puzzle inspired by the game SET. Spot a "set" of three cards where shape, color, fill, and count are each all-same or all-different, as fast as you can!
Dimension Flux
Daily Inter-Dimensional Logic puzzle.
ALLEGEDLY
A daily blind item with the celebrity's name blacked out - read the case and name them in three strikes, with every miss unlocking a clue.
Amountle
A free daily visual-estimation game: study a container, estimate how many objects are inside, and challenge a friend.
Amountle
Watch objects fall into a container, then estimate how many landed. Amountle is a free five-round daily visual estimation game with streak and fill modes.
Amsterdammed
Amsterdammed is a daily loop puzzle set in Amsterdam. Draw one continuous canal that flows through every open square exactly once, curving around houses, windmills, and tulip fields, never crossing a wall and never touching itself. A single closed loop. Timed, one solution, harde
Arrow Puzzle
A free browser logic game with one shared daily challenge. Trace each path, find a clear exit, and remove every arrow in the right order—no download or account required.
Ball Sort Star
Best ball sort app in the App Store! Free, no in-app purchases, no money ever.
Ballast
Daily balance-scale deduction: five crates weigh 1–5 kg, one each. Weigh any set against any other and deduce the exact order in as few weighings as possible. Par 5, streaks, share strings, hard mode + archive.
Binary Puzzle
Logicus is a free daily binary puzzle (also known as Binairo, Takuzu, or Binoxxo) with over 1,200 additional puzzles across four grid sizes and three difficulty levels.
Bros & Cons
Bros always tell the truth, Cons always lie — read their statements and deduce who's lying, in a fresh daily puzzle.
Bros & Cons
A logic deduction game based on R. Smullyan's Knights and Knaves puzzles.
Bros always tell the truth, Cons always lies, can you find the Con?
Cascade Rush
Drop tiles into columns, merge matching numbers, chain combos for a high score.
Chart Streak
Chart Streak challenges you to place hit songs in the correct timeline while building your streak and avoiding strikes.
Chroma
Match the daily target color in six guesses by mixing three shades from a palette, with feedback graded on real color math.
Chronologie
Chronologie is a daily history puzzle where your goal is to place historical events in the correct chronological order. Drag and drop five events onto the timeline, then see how close you were. A new challenge is available every day.
Clue Funnel
A daily puzzle game where you guess the mystery subject using progressively specific clues.
Clue Raider
Find the hidden relic by placing each person in the tomb grid based on their clues.
CodeDoku
Fill a 3×3 grid using intersecting row and column clues. One shared puzzle per day — ~3 minutes, no account needed.
Color Flood: Odyssey
Color Flood: Odyssey is a daily flood it puzzle with a twist. Instead of filling the whole board, you flood tiles to open one unbroken stretch of sea from the top left corner to Ithaca in the bottom right.
Country Draw
Draw a hidden country border from memory on a real map, then compare matched, missed, extra, and accuracy areas in one shared daily geography challenge.
Cross Math
Cross math is a math logic puzzle inspired by sudoku, play by filling the crossword-shaped grid of arithmetic equations so every row and column works out correctly, using addition, subtraction, multiplication, and division together.
Daily Grid
Daily Grid is a free website with 12 daily logic puzzles! Snake, Pathways, Logice, Bits, Bridges, Parcel, Conduit, Perimeter, Polyfit, Tiles, BlindSlide, and Duet. New puzzles every day at midnight PT. No download. Optional account for achievements, cosmetics, streaks, & more!
DailyJig
DailyJig is a relaxing daily jigsaw puzzle game where players solve a new image puzzle every day by dragging and connecting pieces. Track your time, moves, and streak, and come back each day for a fresh challenge.
Ddiagonal sudoku №2 - solve sudoku online
Ddiagonal sudoku №2 - the classic sudoku rules gain two diagonals that must also hold digits 1 to 9 without repeats.
Ddiagonal sudoku №3 - solve sudoku online
Ddiagonal sudoku №3 - the classic sudoku rules gain two diagonals that must also hold digits 1 to 9 without repeats.
Dodeku
Solve the grid by matching sums
Dozenal
Combine number tiles on a grid to form chains that sum to 12.
Equilux
A free daily sun & moon logic puzzle (Tango-style): fill a 6x6 grid with three suns and three moons per row and column, never three in a row, every = and x respected. Unique solution, no guessing - hints explain the rule. Daily, unlimited mode, and a playable archive.
FictaNode - Quick Case
A daily interactive reading game where players solve science-based mysteries. You read a short scenario followed by three conflicting testimonies, using logic and critical thinking to spot the scientific fallacy and catch the liar.
Floe
Daily ice-slide puzzle: your penguin glides until it hits something — collect every fish in as few slides as possible. 3 seeded puzzles a day with par, streaks, share strings, and a full archive.
Gauge
Daily eye-measure gauntlet: 5 estimation rounds, same for everyone each day — count flashed dots, pour to an exact %, set an angle, hold exact seconds with no clock, match a length by eye. Accuracy score, emoji trail share, streak. Language-light: numbers and shapes, not words.
Gerrymandle
Gerrymander the map to win the election.
Grebe
Daily and challenging puzzles on the tree of life, teaching players about evolution and the species on our planet.
GridJoy — Daily Number Puzzles
GridJoy's daily hub serves 7 hand-checked number puzzles every day — Sudoku, Killer Sudoku, Kakuro, Calcudoku, Binary (Takuzu), Hitori and Sumplete — one fresh grid of each, the same for everyone by UTC date so you can compare times. Free in the browser, no account and no ads on
Griductive
A daily deductive logic puzzle — classify suspects and innocents on a grid using pure reasoning. No guessing, no luck. Three difficulty sizes, fresh puzzles every day.
Headcount
Draw one loop on a world population map and try to capture exactly today's target number of people.
Heistle
Heistle is a daily code-cracking game where logical clues help you uncover a secret four-digit code. You have four attempts to crack the safe, upgrade your safehouse, and unlock tools to help complete each heist. Every fifth safe contains a special treasure.
Historic Firsts
Place famous “firsts” in chronological order, from groundbreaking inventions to major discoveries and historical milestone. A new history ranking challenge every day.
Hunch
Wordle meets Mastermind. Daily challenges, tons of features, and PvP!
Jigsaw Binairo
Standard Binairo rules but with regions that need an equal amount of 1s and 0s
Last Control: Decode
A free daily browser game: crack today's intercepted cipher against the clock, get a score and a streak, and share the result. New cipher every day.
LastControl: Daily Audit
A 60-second daily audit: 12 puzzles, same for everyone each day. Score out of 100, deadpan dystopian verdict, streak. Free, no signup.
Legends of Football
Free football game: collect real players, build your national squad, and play matches against others. Daily challenge powers up your cards; pick a nation each week in World Cup mode. Instant play, EN/ES.
Make 10 — Number Puzzle
Make 10 is a free number block puzzle. Drag pieces onto an 8x8 board; line up touching numbers that add to 10 and they clear. Chain clears for combos and beat your
best. No download, no sign-up. Works on any browser or phone. Simple to start, hard to stop. Free at make10s.
Medium Sudoku №90 - solve sudoku online
Medium Sudoku №90 - perfect logic & brain workout! Clean grid, error highlighting, instant check. Solve with pleasure now!
Meikyu
Five residents make up today’s hidden dungeon lineup. You get six tries to name them and put each one in the right slot. Every sortie leaves a report: who is right, who belongs elsewhere, and who is not on the floor.
Mineracer Daily
A daily Minesweeper challenge!
Moadly - Train your Brain
Train your brain, and keep a sharp mind anytime, anywhere
Nonogram
A daily picture-logic puzzle (Picross): fill the grid from the number clues to reveal a hidden picture.
Odd-Even sudoku №1 - solve sudoku online
Odd-Even sudoku №1 - some cells are marked odd or even, and the digit placed there must match. The clue speeds up the solve but still demands attention.
Parithmetic
Parithmetic, a free daily numbers game in the spirit of Countdown, scored like golf. Six tiles, one target; par is proven minimal. No accounts, no ads.
PassportQ
Guess the mystery world city from distance, direction, weather, population, time zone, and travel clues.
PatchesPlay
A daily spatial-reasoning puzzle. Drag clean rectangles, satisfy every clue, fill the board. New levels, leaderboards, and shareable streaks coming soon.
Picas Y Fijas
Deduction logic Bulls and Cows game with a clean interface and no ads.
Rotato
Rotato is a daily rotation puzzle: twist 2x2 blocks of a numbered grid until every tile reads in order, with four sizes daily from an easy 3x3 to a devilish 6x6 and a par move count to beat.
SUMS
SUMS is a daily number-placement puzzle where the arithmetic is simple, but the spatial reasoning is the challenge.
Shifto
Move the tiles to recreate the pattern.
Shrooms
A daily forest logic puzzle: forage exactly two mushrooms in every row, column, and colored region, with none touching, not even diagonally.
Sixth Chain
A logic-based connection puzzle using words and facts, with multiple themes to choose from.
Slideword
Daily 5x5 word puzzle: slide whole rows and columns until all five rows spell words. Tiles wrap around the edges. Timed score, clue-bar hints, Easy and Hard modes. Free, no account, fresh at midnight ET.
Spectra
Sort the items by deducing the hidden metric. Multiple metrics could be used to sort the items, so you must deduce which metric is being used by analyzing the feedback provided after each submission. Every day, a new puzzle is released. Includes stats, leaderboards, and more…
Sphinx Daily
Every day, the game posts exactly 3 new riddles,the difficulty is progressive, first one is the easiest, last one it the hardest, once you start, a timer begins tracking how long it takes you to solve all three.
Sudoku high difficulty №107 - solve sudoku online
Sudoku high difficulty №107 for professionals. Test your logic and attention without hints.
SupaiDa — Spider Solitaire
A free Japanese Spider Solitaire game: clear 1, 2 or 4-suit boards with hint, undo and auto-save. No account, no download, deals save between sessions.
Switches
Tap a switch to flip it and the specific others its icon points to, working to turn the whole board ON in the fewest moves
Tenza
A daily number game
Tessellot
Fit tetris-style tiles in a shape. Daily puzzles, easy, medium and hard.
The Daily Five
Free daily 5-letter word puzzle. Guess the word in 6 tries -- a new word drops at midnight. Dark mode, hard mode, colorblind mode, daily leaderboard, and Android app. No account required.
TileEcho
TileEcho is a free daily visual memory game. Study a briefly flashed pattern, rebuild it on a 5×5 grid, and survive six increasingly difficult rounds. The same challenge is available to everyone each day, with unlimited practice, local streaks, and spoiler-free sharing.
Train Tracks
Train Tracks is a grid-based logic puzzle where you connect stations by placing track pieces in the correct positions. Follow the clues, complete the railway network, and solve each layout without creating broken or invalid connections.
TryHard Puzzles — Daily Star Battle
Free daily Star Battle (Two Not Touch) logic puzzles in three difficulties, plus an unlimited archive, step-by-step solutions, and strategy guides. Plays in the browser — no account needed.
Wardle
Wardle is a free daily vehicle guessing game inspired by Wordle and based on War Thunder. Each day a mystery military vehicle is chosen and players guess which it is using spec-based feedback testing both knowledge and deduction in a fun, strategic challenge.
Well Putt
Daily gravity golf: a 3-hole seeded course where putts curve around gravity wells. Drag back, release, and read the physics — lowest strokes wins. Streaks + golf-style share string.
Whale-a-day
Blood on the Clocktower daily deduction puzzles
Word Pull Daily
Daily typing tug-of-war gauntlet: 3 seeded duels vs AI typists (easy/medium/hard), same words for everyone; flawless words build HEAT to out-pull the AI. Trail share + streak, plus an endless AI ladder. Free, no signup.
ZokoPlay
ZokoPlay is a free browser-based daily puzzle platform featuring Wordle, Connections, Contexto, Waffle, Mini Crossword, and Sudoku. Each game offers a fresh daily puzzle, with progressive hints and answer archives for selected games.
inSudoku
A calm, distraction-free Sudoku game with six strategy-rated difficulty levels, candidate notes, hints, undo, and private auto-save. Play instantly on desktop or mobile—no account or download.
Jhakkasra: Optimized 3x3 Sliding Puzzles
A high-precision 3x3 sliding puzzle platform where difficulty is based on optimal move counts. Challenges range from Beginner (10 moves) to Legendary levels requiring 30 optimized moves. Features 10,000+ puzzles, daily streaks, and multi-language support.
Lexamid
You're given 14 letters. You have to build a "Lexamid" (word pyramid) by finding 5, 4, 3, and 2-letter words. There's a new challenge every day, and you can now play endlessly.
anoun
Guess a word to learn what it has in common with the hidden word.
Alibi
Alibi is a daily cozy-mystery logic puzzle. A death overnight, a household with statements — every word of them true, but only one arrangement of people and implements fits all of them at once. Read the rail, place each suspect and every piece of evidence back where they belong.
Math Minute Challenge
It could take more than a minute ;)
Bulls & Cows — Bull Rush
Unique-solution daily deduction puzzle with emoji feedback.
Stepwords
Daily word-ladder style challenge in your browser.
Daily Connections
Find hidden connections between 16 words. Group them into 4 categories with increasing difficulty. Share your daily results!
How is “hardest” defined on this page?
The directory does not currently store a dedicated global difficulty score for every listing, so this page uses a practical editorial proxy: it focuses on categories that usually skew harder—logic, deduction, math, and spatial—and gives extra weight to games described as hard, challenging, expert, fiendish, or difficult.
Within that filtered set, the list is still ordered by rating so the best-liked tough puzzles rise first.
More ways into the directory
These supporting collection pages help puzzled.online cover adjacent search intent without forcing every player through the homepage first.