Free interactive tool
Sudoku 9 × 9
Generate a new uniquely solvable Sudoku, with checking, hints and a timer.
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Make room for discovery.
Choose a tool, practise a skill or create a plan. Everything here is free.
Free interactive tool
Sliding fifteen
Move adjacent tiles into order. Every new board is shuffled through legal moves.
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2048
Combine equal tiles with arrow keys or direction buttons.
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Memory pairs
Reveal cards and find matching pairs.
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Mini nonogram
Fill a 5 × 5 grid to match its row and column clues.
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Minesweeper
Reveal an 8 × 8 field and mark suspected mines.
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Local score history
Review scores saved on this device and export them. This is not an online leaderboard.
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Logic riddles
Work through twelve reasoning questions with explanations.
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Number challenge
Practise generated arithmetic questions and record a local session score.
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