Rules & strategy guides

How to play every puzzle

28 number and logic puzzles, each explained in plain English with an animated example board, beginner tips and the mistakes to avoid. Learn one in five minutes, then play it free in the app.

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Sudoku family

Classic Sudoku and ten variants that add cages, lines, dots and arrows to the grid.

11 guides

How to play Sudoku
Nine rows, nine columns, nine boxes and one rule: no repeats.
5 minutesVideoRead
How to play Killer Sudoku
Sudoku with maths: every dashed cage must add up to its total.
10 minutesVideoRead
How to play Thermo Sudoku
Every thermometer climbs: smallest at the bulb, biggest at the tip.
5 minutesVideoRead
How to play Kropki Sudoku
White dot: one apart. Black dot: one is double the other.
5 minutesVideoRead
How to play Palindrome Sudoku
Every grey line reads the same from either end.
5 minutesVideoRead
How to play Sandwich Sudoku
The 1 and the 9 are the bread. The clue is the filling.
5 minutesVideoRead
How to play XV Sudoku
X is ten, V is five, and 5 never touches either.
5 minutesVideoRead
How to play Jigsaw Sudoku
Same rows and columns. The boxes become jigsaw pieces.
3 minutesVideoRead
How to play Arrow Sudoku
The circle is the total. The arrow's shaft is the sum.
5 minutesVideoRead
How to play Search 9 Sudoku
The arrow is the direction. The digit is the distance to a 9.
5 minutesVideoRead
How to play Circle-Sum Sudoku
Nine cells, nine digits, and overlapping sums that solve each other.
3 minutesVideoRead

Number crunchers

Sums, products and sequences: puzzles where the numbers themselves are the clues.

8 guides

Shade & place

Shade cells, place stars and draw regions. Pure deduction, barely any arithmetic.

7 guides

Picture

Reveal a hidden image, or rebuild a scrambled one.

2 guides