Choose your puzzle

Free Logic Games Online

Compare three browser-based logic puzzles before you play. Each one asks you to reason about a different thing: placement constraints, stopping-point routes, or release order.

These are recreational games, not intelligence tests or medical tools. Scores reflect performance in a specific game and stage only.

Compare

Which kind of logic do you want to use?

Solo Square

Think about: Where the only valid character placement can go
How you play: Place characters and mark impossible cells with ×
Difficulty: Boards grow from 4×4 to 9×9
Score: Clear time, +5 seconds per invalid placement, and +30 seconds per hint

Stop Spot

Think about: Which stopping points make a complete route possible
How you play: Slide until a wall or the board edge stops you
Difficulty: Larger grids, more spots, and fewer walls
Score: Clear time, plus 5 seconds for each undo

Signal Tangle

Think about: Which signal line must be released first
How you play: Select lines that have an open route off the board
Difficulty: More dependencies and color locks to read ahead
Score: Clear time, plus 10 seconds for each blocked tap

Compare	Solo Square	Stop Spot	Signal Tangle
Think about	Where the only valid character placement can go	Which stopping points make a complete route possible	Which signal line must be released first
How you play	Place characters and mark impossible cells with ×	Slide until a wall or the board edge stops you	Select lines that have an open route off the board
Difficulty	Boards grow from 4×4 to 9×9	Larger grids, more spots, and fewer walls	More dependencies and color locks to read ahead
Score	Clear time, +5 seconds per invalid placement, and +30 seconds per hint	Clear time, plus 5 seconds for each undo	Clear time, plus 10 seconds for each blocked tap

Choose a game

Solo Square

Place exactly one character in every row, column, and outlined area. Characters cannot touch, even diagonally, so each move narrows the remaining possibilities.

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Stop Spot

You cannot stop whenever you want. A spot counts only when you stop on it, so plan the route around walls and edges before finishing on the exit.

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Signal Tangle

Release curved signal lines in an order that leaves their routes open. Color locks disappear only after every matching line has exited the board.

Details Play

Logic games FAQ

Yes. You can open a game in your browser and start at stage 1 without paying or downloading an app.

Choose Solo Square for placement and elimination, Stop Spot for route planning, or Signal Tangle for sequence and dependency puzzles.

No. Brain Arena games are recreational puzzles. Their scores describe your performance in the game and are not an intelligence test, medical assessment, or diagnosis.

These three games use clear time. Solo Square adds five seconds for an invalid placement and 30 seconds for a hint. Stop Spot adds five seconds for an undo. Signal Tangle adds 10 seconds for a blocked tap. A score is specific to that game and stage.