The whole notebook
All twenty puzzles
Every puzzle on the site, in order. Filter by type, or show only the ones you have not solved yet. Your ticks are kept in this browser.
- 01Mine SweepOpen every safe square on a 9 by 9 field without touching one of the ten hidden mines.
- 02Sudoku SixA smaller sudoku: fill a 6 by 6 grid so each row, column and box holds the digits 1 to 6.
- 03Nonogram 5×5Shade squares to match the number clues on each row and column and reveal a small pattern.
- 04Code BreakerFind the hidden four-digit code in ten guesses, using the feedback after each attempt.
- 05Tower of HanoiMove a stack of discs from the left peg to the right, one at a time, never placing a larger disc on a smaller one.
- 06Peg SolitaireJump pegs over each other on a cross-shaped board until only one remains.
- 07Pipe TwistRotate the pipe pieces until every square is connected to the red source in the middle.
- 08Colour FloodSpread one colour across the whole board in 22 moves or fewer, starting from the top left corner.
- 09Water SortPour coloured layers between tubes until each tube holds a single colour.
- 10Knight's TourMove a chess knight around a 5 by 5 board so that it lands on every square exactly once.
- 11Eight QueensPlace eight chess queens on the board so that no queen can capture another.
- 12Block CollapseClear groups of matching blocks. Bigger groups score far more, so plan before you tap.
- 13Magic SquareArrange the numbers 1 to 9 in a 3 by 3 grid so that every row, column and diagonal adds up to 15.
- 14UntangleDrag the dots so that none of the lines between them cross.
- 15Ice SlideSlide across the ice to the flag. Once you start moving, you only stop when you hit something.
- 16Two JugsMeasure out an exact amount of water using only two unmarked jugs of different sizes.
- 17Schulte GridFind and tap the numbers 1 to 25 in order, as fast as you can.
- 18Pattern RecallA pattern of squares lights up for a moment. When it disappears, tap the same squares from memory.
- 19River CrossingFerry a wolf, a goat and a cabbage across a river in a boat that carries only one of them at a time.
- 20Binary GridFill the grid with 0s and 1s so that no three alike sit together and every line is balanced.