The MundoSudoku blog
Techniques, tips and trivia to become a sudoku master.
How to Get Free MS Coins (Every Way, and the Daily Caps)
Up to 200 MS Coins a day from sudoku, 185 from daily quests and the payouts you only collect once. The full list, with every cap.
Read article →What Is Hotel MS and How to Get Started (A First-Day Guide)
An entire hotel inside your browser: an avatar, your own room, the Plaza, friends, and a 200 MS Coins welcome bonus. That's day one.
Read article →How Fishing Works in Hotel MS (and Where Rare Fish Turn Up)
The beach's four zones, the rod's three timings, the seasons that rotate monthly, and the estuary where the tide calls the shots.
Read article →Decorate Your Room in Hotel MS: Furniture, Quests, Pets
The shop by section, furniture that's only around for a month, quests that pay for themselves, and the dog that follows you around your room.
Read article →1 vs 1 sudoku duel: the same board, and the first to finish wins
The same puzzle for two people at once, no hints and matched by level. How it works and why the server decides.
Read article →The Master's Path: 27 sudoku variants and 81 stars
Three stars per variant, the target times for all 27, and why a star you've earned is never lost.
Read article →Install MundoSudoku as an app on your phone (free, no app store)
Home screen icon, full screen and offline sudoku. How to install the new app on Android, iPhone and PC in under a minute.
Read article →Dominoes strategy: tricks to win more games
Dominoes strategy: when to lead with a double, how to count tiles, control the ends and block your opponent's numbers.
Read article →Dots and Boxes scoring: rules and how points work
Dots and Boxes scoring rules: how a box is closed, when you move again, how the score is counted and how the winner is decided.
Read article →Dots and Boxes: strategy and tricks to win
Learn Dots and Boxes strategy: the chain rule, the double-cross sacrifice, and the common mistakes that hand points to your opponent.
Read article →How sudokus are made (and why they have one solution)
Discover how a sudoku is generated: full grid, cell removal, unique-solution checking and how difficulty is measured.
Read article →Mastermind strategy: crack the code in 5 guesses
Strategy to win at Mastermind: the ideal first guess, how to read the peg feedback and the elimination method to crack the code fast.
Read article →How to solve a hard sudoku step by step
A step-by-step method for hard sudokus: pencil marks, naked pairs, hidden singles and how to unblock a stuck puzzle.
Read article →How to solve nonograms (picross) step by step
Learn to solve nonograms: the overlap technique, marking blanks with X, chaining rows and columns, and why you should never guess.
Read article →The 7 sudoku techniques: from beginner to expert
The 7 essential sudoku techniques ordered by difficulty: scanning, singles, naked pairs, hidden pairs, pointing candidates, X-Wing and chains.
Read article →How to win Five in a Row: strategy and key moves
Five in a Row (gomoku) strategy: the value of the centre, double threats, the open three and how to defend without turning passive.
Read article →How to play Chinchón online
Spanish deck, melds, when to close and the Chinchón: rules, scoring to 100 points, rooms with bots and ranking.
Read article →How to play Poker Texas Hold'em online
Tournaments and tables for 2 to 9 players, public or private, betting with a slider, ranking and stats. Free and no real money.
Read article →How to play Blackjack (21) online
Get to 21 and beat the dealer: rules, when to hit or stand, the natural blackjack and ranking. Free and no real money.
Read article →Bingo Online: rooms for up to 60 players
Tap a button and drop straight into a live room, no code or signup needed: here's how the online Bingo rooms work.
Read article →The history of sudoku: from Euler to Japanese newspapers
The world's most famous puzzle wasn't born in Japan. The curious journey of sudoku from Euler's Latin squares to a worldwide phenomenon.
Read article →Brain benefits of sudoku: what science actually says
Memory, focus and mental agility: an honest look at what's known about the effects of logic puzzles on our minds.
Read article →How to solve a sudoku step by step (beginner's guide)
Learn the method experienced players use to complete any easy or medium sudoku without guessing or erasing.
Read article →Advanced sudoku techniques: naked pairs, candidates and X-Wing
When the basics aren't enough, these strategies let you solve hard and expert-level sudokus.
Read article →10 tips to improve your sudoku solving time
How to scan the board, when to note candidates, and the small habits that are quietly slowing you down.
Read article →The 7 most common mistakes when solving a sudoku
Guessing too soon, forgetting the blocks, marking candidates wrong: the mistakes almost every beginner makes.
Read article →Sudoku for kids: how to teach them to play step by step
What age to start, how to explain the rules, and tips so kids enjoy sudoku without getting frustrated.
Read article →Sudoku variants: killer, samurai, diagonal and more
A rundown of the best-known sudoku variants and how they differ from the classic.
Read article →How long does it take to solve a sudoku? Times by level
Average times by level, what they depend on, and how to improve your personal best.
Read article →How to use notes mode (pencil marks) in sudoku
Mark candidates, organize your reasoning, and solve hard sudokus without memorizing anything.
Read article →How sudokus are generated: the technology behind every board
How a computer creates sudokus with a unique solution and how difficulty is calibrated.
Read article →Daily sudoku: why solving one every day is a great habit
Consistency, disconnection and motivation: why one sudoku a day is a great habit.
Read article →How to solve the 15 Puzzle: step-by-step method
A row-by-row, column-by-column method that always works, not luck.
Read article →How to solve the Tower of Hanoi: method and minimum moves
The recursive method, the minimum number of moves, and why it's a logic classic.
Read article →How to play Pong (controls and strategy)
Controls, how the bounce angle works, and tips to beat the computer.
Read article →How to play Tennis (online): rules and strategy
Controls, ball spin, and real tennis scoring. Tips to win the set.
Read article →How to play Billiards (8-ball): rules and tips
How to create a room with a code, aim, and the rules for solids and stripes.
Read article →How to play Air Hockey (2 players): rules and tips
How to create a room with a code, move the mallet, and the rules to score 7 goals.
Read article →How to play Chess: basic rules and first principles
How each piece moves, the goal of checkmate, and opening principles for beginners.
Read article →How to play Battleship: rules and strategy to sink the fleet
The checkerboard-pattern firing strategy to sink ships in fewer shots.
Read article →How to play Five in a Row (Gomoku): rules and strategy
Rules for lining up five pieces and strategies like double threats.
Read article →How to play Connect 4: rules and strategy to win
Why the center is key and how to create a double threat to beat the computer.
Read article →How to play Checkers: rules and strategy to win
Board rules, how pieces are captured, and how a piece becomes a king.
Read article →How to play Dominoes: rules and strategy to win
How to chain tiles by the ends, when to draw or pass, and tips to win.
Read article →How to play Head Soccer (2 players): tips
Controls, rules, and tips to score and win by 5 goals.
Read article →How to play Gomoku (Five in a Row): rules and strategy
Rules and strategy on a 15x15 board: line up five pieces and win.
Read article →How to play Mini Golf: how to aim and finish in fewer strokes
How to aim by dragging the ball and calculate shot power.
Read article →How to play Parcheesi (Ludo): rules and strategy to win
How to bring pieces out, how captures work, and what safe spots are.
Read article →How to play Penalty Shootout: tips to score and save
How to choose where to shoot and read your opponent's shot to save it.
Read article →How to play Rock, Paper, Scissors and win more rounds
The psychological tricks expert players use to win more than pure chance would predict.
Read article →How to play Reversi (Othello): rules and strategy
How pieces get flipped and why corners are the key to winning.
Read article →How to play Dots and Boxes: rules and strategy
How to close boxes and the chain strategy to win.
Read article →How to play Tic-Tac-Toe and never lose
The strategy that guarantees you'll never lose: center, corners and double threats.
Read article →How to play 2048: rules, strategy and tips to win
The corner strategy to reach 2048 and beyond.
Read article →How to play Word Guess (our Wordle-style game)
What the colors mean and the best starting-word strategy.
Read article →How to play Hangman and guess the word first
Why you should start with vowels and frequent consonants.
Read article →How to play Anagrams: tricks for unscrambling letters
How to solve them step by step and find the hidden word faster.
Read article →How to play Lights Out: rules and strategy
The row-by-row method to turn off the whole board.
Read article →How to play Binairo (Takuzu): rules and tricks
Fill the grid with 0s and 1s following three simple rules.
Read article →How to play Bubble Shooter: tricks and strategy
Aim with wall bounces and drop clusters for bonus points.
Read article →How to play Minesweeper: rules and strategy without guessing
What the numbers mean and the logic to clear the board safely.
Read article →Mental Math: how to play and tricks to calculate faster
Breaking numbers apart and rounding to score more in 60 seconds.
Read article →How to play Candy Match (match-3): rules and tricks
How to combine pieces and create special combos.
Read article →How to play Maze Muncher: tricks and strategy
Eat the dots, use the power pellets and dodge the ghosts.
Read article →How to play Fruit Slice: tricks and combos
Slice by swiping, chain combos and dodge the bombs.
Read article →How to play Crossword: rules and tricks to fill it in completely
How the horizontal and vertical words cross each other.
Read article →How to play Snake and score more points
Controls, rules and tricks to grow longer and not crash.
Read article →How to play Spot the Difference: tricks
How to compare the panels and avoid mistakes.
Read article →How to play Flow (connect the colors): puzzle tricks
Connect each pair of dots without crossing paths.
Read article →How to play Futoshiki: rules and tricks
Fill the grid respecting the greater-than and less-than signs.
Read article →How to play Whack-a-Mole
Reflex tricks to get the highest score in 30 seconds.
Read article →How to play Hitori: rules and tricks
Black out cells so no number repeats in any row or column.
Read article →Memory Game: how to play and tricks to remember better
Simple techniques to find every card with the fewest tries.
Read article →How to play Kakuro: rules and strategy for the sum-based Sudoku
What the clues mean and the combinations that save you time.
Read article →How to play Killer Sudoku (Sudoku with cages): rules and tricks
The rules of Sudoku plus cages with sums and the rule of 45.
Read article →How to play the Maze: how to find the exit faster
The wall-following technique to never get lost.
Read article →How to play Mahjong Solitaire: rules and tricks
How to pair up matching tiles to clear the board.
Read article →How to play Mastermind (Secret Code): rules and method
The deduction method to guess the code in fewer tries.
Read article →How to play Nonogram (Picross): a beginner's guide
The logic techniques to fill the grid without guessing.
Read article →How to play Word Search and find words faster
Look for rare letters, scan the diagonals, and work by zones.
Read article →How to play Tetris: controls, rules and tips
Keep the board flat and score a four-line Tetris.
Read article →How to play Trivia and get more answers right
The elimination technique to get more general-knowledge questions right, even when you're not sure.
Read article →How to play Moto Racer: tips and strategy
Dodge traffic, collect coins and use the turbo at the right moment.
Read article →How to play Breakout (Arkanoid): controls and tips
Control the bounce angle and open a side tunnel to clear rows fast.
Read article →How to play Rush Hour (Unblock): puzzle tips
Work backward from the exit to clear a path for the red car.
Read article →How to play Peg Solitaire: rules and tips
Jump chains and how to avoid stranding pegs in the corners.
Read article →How to play Simon Says and memorize longer sequences
Group colors into blocks instead of memorizing them one by one.
Read article →How to play Sokoban: rules and strategy to avoid deadlocks
Think before you push: how to avoid wedging a box into a dead corner.
Read article →How to play Solitaire (Klondike): rules and strategy
Prioritize revealing hidden cards over filling the foundations too soon.
Read article →How to play Space Invaders
Clear the side columns first to slow the formation's descent.
Read article →How to play Yahtzee: rules and tips
How to secure the upper bonus and when to sacrifice a category.
Read article →4x4 Sudoku for kids: how to play step by step
The easiest sudoku, perfect for teaching kids the basics.
Read article →6x6 Sudoku: how to play, rules and tips
The perfect stepping stone between the 4x4 and the classic 9x9.
Read article →How to play 16x16 Sudoku: rules and tips
The giant sudoku with 4x4 boxes and 16 symbols, 1-9 and A-G.
Read article →How to play Anti-Knight Sudoku: rules and tips
A chess rule added to sudoku: no repeats a knight's move apart.
Read article →How to play Anti-King Sudoku: rules and tips
No two diagonally touching cells can share the same number.
Read article →How to play Antidiagonal Sudoku: rules and tips
Each main diagonal uses only 3 different digits, three times each.
Read article →How to play Clone Sudoku: rules and tips
Same-colored regions must contain identical numbers in identical spots.
Read article →How to play Ratio Sudoku: rules and tips
A marked dot means one cell is an exact multiple of the other.
Read article →How to play Consecutive Sudoku: rules and tips
A bar means two neighboring numbers differ by exactly one.
Read article →How to play Sudoku X (Diagonal Sudoku): rules and tips
Both main diagonals also carry 1 to 9 without repeats.
Read article →How to play Arrow Sudoku: rules and tips
The circle's number equals the sum of the digits along its arrow.
Read article →How to play Odd Sudoku: rules and tips
Shaded cells only accept the odd digits: 1, 3, 5, 7 or 9.
Read article →How to play Jigsaw Sudoku (Irregular): rules and tips
Odd-shaped regions replace the usual 3x3 boxes.
Read article →How to play Kropki Sudoku: rules and tips
White dot means consecutive, black dot means double.
Read article →How to play Little Killer Sudoku: rules and tips
Outer arrows give the sum of every cell along a diagonal.
Read article →How to play Non-Consecutive Sudoku: rules and tips
Neighboring cells can never hold consecutive numbers.
Read article →How to play Palindrome Sudoku: rules and tips
Numbers along each gray line read the same both ways.
Read article →How to play Even Sudoku: rules and tips
Shaded cells only accept the even digits: 2, 4, 6 or 8.
Read article →How to play Renban Sudoku: rules and tips
Each purple line holds a run of consecutive digits in any order.
Read article →How to play Sandwich Sudoku: rules and tips
The outer numbers show the sum of the digits between the 1 and the 9.
Read article →How to play Thermometer Sudoku: rules and tips
Numbers strictly increase along each thermometer, from bulb to tip.
Read article →How to play Whisper Sudoku (German Whispers): rules and tips
Neighboring cells on a green line must differ by at least 5.
Read article →How to play Windoku (Hyper Sudoku): rules and tips
Four extra shaded boxes also carry 1 to 9 without repeats.
Read article →How to play X-Sums Sudoku: rules and tips
The clue sums the first N cells of a line, where N is the first cell.
Read article →How to play XV Sudoku: rules and tips
An X between cells sums to 10, and a V sums to 5.
Read article →Sudoku glossary: every term explained
Candidate, scanning, naked pair, X-Wing... The sudoku dictionary to understand every guide and talk like an expert.
See glossary →