Flip Puzzle Online

Flip is one of the classic one-player logic games in Simon Tatham's Portable Puzzle Collection. Flip groups of squares to light them all up at once.

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Preparing the board and controls.

Game Objective

Turn on every square in the grid. Each move toggles a small pattern of squares: lit squares turn off, and unlit squares turn on.

Flip groups of squares to light them all up at once.

Click a square to toggle it and the neighboring squares shown by the diagram inside that square.
You can also move the cursor with the keyboard and press Space or Enter to use the highlighted square.
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.

Read the small diagram in a square before clicking; it tells you which nearby squares will change.
Clicking the same square twice cancels that move, because the same lights are toggled back.
Work from corners and edges first. They have fewer neighbors, so their effects are easier to predict.