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.
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.
Ball Sort Star
Best ball sort app in the App Store! Free, no in-app purchases, no money ever.
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.
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.
Dodeku
Solve the grid by matching sums
Gerrymandle
Gerrymander the map to win the election.
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.
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!
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.
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.
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.
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.
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.
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
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.
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.
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.