Articles

Puzzles

• Light UpPlace light bulbs until every white square is lit, with no bulb shining on another and every number counting the bulbs beside it. Also called Akari. Rules, solving guides and puzzles to play.
• NurikabeShade a wall that leaves each number its island of that many squares: one wall, joined up, with no 2×2 blocks. Rules, solving guides and puzzles to play.
• ShikakuDivide the grid into rectangles, each holding one number: its area. Also called Rectangles. Rules, solving guides and puzzles to play.
• SkyscrapersFill a grid with buildings so every row and column holds each height once, and the clues around the edge show how many you can see. Rules, solving guides and puzzles to play.
• TentsGive every tree a tent of its own beside it. Tents never touch, and the numbers say how many tents each row and column holds. Also called Tents and Trees. Rules, solving guides and puzzles to play.
• AquariumFill a grid of tanks with water so every row and column holds its number of water squares, with the water lying flat in each tank. Rules, solving guides and puzzles to play.
• Star BattlePlace stars so every row, column and region holds the same number of them, and no two stars touch, not even at a corner. Also called Two Not Touch. Rules, solving guides and puzzles to play.
• FutoshikiFill a grid so every row and column holds each number once, and every greater-than sign between two squares holds. Rules, solving guides and puzzles to play.
• HitoriShade squares in a grid of numbers so no number repeats in a row or column, shaded squares never touch, and the rest stay joined up. Rules, solving guides and puzzles to play.
• BinairoFill a grid with two colours: no three alike in a line, half of each, and no two lines the same. Also called Takuzu or the binary puzzle. Rules, solving guides and puzzles to play.
• MinesweeperOpen every safe square without setting off a mine, using the numbers each square reveals. Rules, solving guides and boards to play.
• NonogramsFill in squares to match the number clues on every row and column, and a picture appears. Rules, solving guides and puzzles to play.
• KakurasuShade squares so every row and column adds up to its target. Rules, solving guides and puzzles to play.
• SudokuFill the grid so every row, column and box holds 1 to 9 once. Rules, solving guides and puzzles to play.