Sudoku
Nonogram
Train Tracks
Pipes
Screw Puzzle
Arrow Exit
Block Puzzle
Drop Merge
2048
Shikaku
Divide the grid into rectangular boxes. Every box contains exactly one number, and that number is how many cells the box covers. Drag across the cells to draw a box.
6×6 grid with small boxes — a gentle start.
8×8 grid with boxes of up to 10 cells.
10×10 grid with boxes of up to 14 cells.
PlayHow to play Shikaku →Free online Shikaku puzzles
Shikaku, also known as Rectangles or Divide by Box, is a logic puzzle first published by Nikoli in 1989. Every puzzle on PuzzleWorld is randomly generated and checked by a solver, so there is always exactly one way to split the grid.
Start with numbers that fit in only one place: a 2 in a corner, or a large number squeezed between other clues. While you drag, the size of the box is shown and turns green when it matches a number.