Choose your puzzle
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
| 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 |
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.
