Cipher Grove2–5 min
Sudoku
Sudoku turns a compact set of clues into a satisfying chain of deductions.
Switchyard Signals
Switchyard Signals turns a compact set of clues into a satisfying chain of deductions. Read the board, rule out contradictions, and commit only when every clue supports the move.
SW
Ready when you are
Switchyard Signals
Toggle five rail switches to match the route card, then send the train and see whether it reaches the station safely.
No sign-up · Saves on this deviceHow to play
Small rules. Plenty to master.
Switchyard Signals turns a compact set of clues into a satisfying chain of deductions. Read the board, rule out contradictions, and commit only when every clue supports the move. A compact ruleset opens into deeper mastery through changing constraints and board states. Its identity comes from a distinctive objective and rule twist rather than a cosmetic reskin. A typical session lasts three to eight minutes, works comfortably with touch or keyboard, and saves progress without requiring an account.
01
Learn the move
Toggle five rail switches to match the route card, then send the train and see whether it reaches the station safely.
02
Build a run
Pause before committing when the board changes.
03
Beat your best
Short, consistent streaks score better than risky guesses.
Controls & accessibility
Controls: Touch, pointer, and keyboard. The game supports reduced motion, color-independent cues, clear focus states, and a touch-first layout.
Frequently asked
Do I need an account?
No. Play instantly; an account is only needed to sync progress.
Does it work on mobile?
Yes. Every launch game is designed and tested for touch.