Pattern Puzzle Online

Pattern is one of the classic one-player logic games in Simon Tatham's Portable Puzzle Collection. Fill in the pattern in the grid, given only the lengths of runs of black squares.

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Preparing the game board and controls.

Game Objective

Reveal the hidden black-and-white picture. The numbers beside a row or column describe the black groups in order: for example, 3 1 means a group of three black squares, then at least one white square, then a single black square.

Fill in the pattern in the grid, given only the lengths of runs of black squares.

How to Play

Left-click a square to mark it black.
Right-click, or Ctrl-left-click, to mark it white.
Middle-click, or Shift-left-click, to return a square to undecided.
Drag along a row or column to mark several squares at once.
These puzzles reward careful deduction more than speed. Start with the most constrained clues, eliminate impossible choices step by step, and avoid guessing unless the puzzle specifically calls for it.