Fifty-four mind games in one window. Every puzzle is generated on your computer, puzzles with a single answer are checked to have exactly one, and everything works fully offline.

Games

Sudoku

• Sudoku: The classic 9×9 with lifelines and explained hints.
• Mini Sudoku: 4×4 and 6×6 grids for a quick game.
• Killer Sudoku: Dashed cages add up to their totals.
• Sudoku X: Both long diagonals hold 1 to 9 too.
• Hyper Sudoku: Four shaded windows join the rules.
• Jigsaw Sudoku: Irregular regions instead of boxes.
• Anti-Knight Sudoku: No repeats a knight's move apart.
• Anti-King Sudoku: No repeats across touching corners.
• Non-Consecutive Sudoku: Neighbours never differ by one.
• Even-Odd Sudoku: Squares hold evens, circles hold odds.
• Greater-Than Sudoku: Signs inside each box compare neighbours.
• Kropki Sudoku: White dots: consecutive. Black dots: double.
• Thermo Sudoku: Digits rise along every thermometer.
• Arrow Sudoku: Arrow digits sum to their circle.
• Samurai Sudoku: Five grids locked together at the corners.
• Hexadoku: The 16×16 giant, from 0 to F.

Number puzzles

• Futoshiki: A Latin square bound by inequality signs.
• Calcudoku: Cages of sums, differences, products and quotients.
• Kakuro: Cross sums: runs of digits that add up to their clues.
• Make 24: Four numbers, four operations, one target.
• Sumplete: Delete numbers until rows and columns add up.
• Skyscrapers: Count the towers you can see from each side.

Logic grids

• Minesweeper: Clear the field; the numbers count hidden mines.
• Nonogram: Shade cells from the number clues to reveal a picture.
• Binairo: Zeros and ones, balanced, with no triples.
• Star Battle: One star per row, column and region.
• Hitori: Shade repeats away, keep the rest connected.
• Lights Out: Every press flips a cross of lights.

Moving pieces

• 2048: Slide and merge tiles up to the goal.
• Sliding Puzzle: Slide numbered tiles back into order.
• Tower of Hanoi: Move the tower; big disks never sit on small ones.
• Peg Solitaire: Jump pegs until a single one remains.
• Pipes: Turn tiles until power reaches every lamp.
• Maze: Find the one route from corner to corner.
• N-Queens: Place queens so none can attack another.
• Knight's Tour: Visit every square once with a chess knight.
• Traffic Jam: Slide the cars until the red one can drive out.

Duels

• Tic-Tac-Toe: Three in a row against a computer that never blinks.
• Four in a Row: Drop discs and line up four before the computer does.
• Reversi: Outflank and flip; corners are gold.
• Dots and Boxes: Close boxes to keep your turn; give away short chains.
• Nim: Take stones from one row; the last stone decides.
• Mancala: Sow seeds, capture, and chain extra turns.
• Gomoku: Five in a row on a 15×15 board.
• Checkers: Jump, capture and crown kings.

Brain training

• Pairs: Flip cards two at a time and match them all.
• Echo: Repeat a sequence of lights that grows each round.
• Code Breaker: Crack a hidden colour code from feedback pegs.
• Schulte Table: Find the numbers in order, as fast as you can.
• Colour Clash: Name the ink, not the word. Sixty seconds.
• Mental Maths: As many sums as you can in a minute.
• Number Memory: Remember a number; it grows by a digit each time.
• Word Guess: Six tries to find the hidden five-letter word.
• Word Search: Find themed words hidden in a grid of letters.

Developer

Raghav Raman the.raghav.raman@gmail.com