The MundoSudoku blog
Techniques, tips and trivia to become a sudoku master.
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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 →