Light Path Guide: White-Light Strokes, Full Coverage, and Connect
All three modes reward planning before drawing. White Lights connects only the lit targets and must begin at the green start. The full-board stroke visits every valid cell. Connect joins matching colored endpoints while filling the entire grid.
Understand the rules first
Paths move only between orthogonally adjacent cells; diagonal steps and repeated locked cells are not allowed. White Lights starts at green and visits every white light in one stroke. Full Coverage traverses every valid cell. Connect joins each pair of colored endpoints with noncrossing paths that fill all cells.
Controls and observation
Press the required start and drag through adjacent cells, or tap valid nodes in sequence. Some modes let you backtrack by returning to the previous cell. Confirm the active mode first because dark cells are irrelevant in White Lights but coverage is mandatory in the other modes.
Strategy by difficulty
Beginner
In White Lights, identify graph endpoints—lights with only one possible neighbor. With green fixed as the start, avoid entering another dead end too early. Count and trace short routes before touching the board.
Intermediate
For full coverage, handle corners and narrow corridors first. Once you enter a one-exit region, you normally must finish it immediately. Think of connected corridors rather than 25 unrelated buttons.
Challenge and mastery
In Connect, route the most constrained color first, especially endpoints in corners or narrow edges. Do not draw a short line that splits the center into disconnected areas. After each color, verify that all remaining empty cells still form usable routes.
A reliable solving routine
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Confirm the mode, fixed start, and required cells.
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Mark corners, one-exit nodes, and narrow corridors.
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Plan constrained regions before open central space.
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After every step, check that the unfilled region remains connected.
Common mistakes
- Beginning White Lights from a white node instead of the green start.
- Occupying a central gateway too early and splitting the board.
- Connecting endpoints in Connect while leaving isolated empty cells.
Practice advice
Trace a complete route just above the screen before committing. After failure, find the first cell that divided the remaining area rather than examining only the end. On hard levels, counting entrances into each region is more effective than repeated guessing.
Quick answer
All three modes reward planning before drawing. White Lights connects only the lit targets and must begin at the green start. The full-board stroke visits every valid cell. Connect joins matching colored endpoints while filling the entire grid. Use this as the main decision rule: before every action, say what constraint it satisfies and what future option it preserves.
A worked attempt: think before acting
A useful first-pass approach is: in White Lights, identify graph endpoints—lights with only one possible neighbor. With green fixed as the start, avoid entering another dead end too early. Count and trace short routes before touching the board. After that move, pause and compare the actual state with the one you predicted. If they differ, correct the model before adding more actions.
Now test the opposite of a common failure: beginning white lights from a white node instead of the green start. Instead of repeating that pattern, undo to the first decision that created it and choose the move that leaves more legal continuations. This turns an apparent mistake into a reusable solving example.
How the difficulty curve changes
Early levels isolate one rule so the result of each move is easy to see. Intermediate levels combine two rules and make move order important. Challenge levels add look-alike states, tighter space, or longer dependencies. Mastery means explaining why a move is safe, not merely remembering a solution.
For a new level, use three passes:
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Map: identify fixed goals, movable parts, forbidden states, and scarce spaces.
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Plan: choose one short milestone that can be checked immediately.
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Verify: after reaching it, confirm that the next milestone remains possible.
Frequently asked questions
What should I focus on first in Light Path?
Start with the most restrictive rule described at the top of this guide. Forced moves, narrow corridors, limited capacity, or unique candidates reduce the search space fastest.
What is the most common reason a valid move becomes a bad move?
A move can be legal now but destroy a future option. The warning sign in this puzzle is: beginning White Lights from a white node instead of the green start. Check the state one or two actions ahead before committing.
How do I know whether I am improving?
Track one measure at a time: fewer restarts, fewer undos, lower move count, better accuracy, or the ability to explain each choice. A faster time is meaningful only when correctness stays stable.
Are the daily and shared challenges different from ordinary levels?
They use the same game rules. The daily challenge provides a date-based common puzzle, while a challenge link preserves a specific level or state so two players can compare decisions on equal terms.
Key terms
- State: all information needed to determine the next legal actions.
- Constraint: a rule that eliminates impossible choices.
- Look-ahead: predicting the result of one or more actions before making them.
- Dead end: a legal-looking state from which the goal can no longer be reached.
- Efficiency: useful progress per move rather than motion for its own sake.
A deliberate practice routine
Play once without worrying about score. On the second attempt, stop at the first uncertainty and state two candidate actions. Predict the consequence of each, choose one, and use undo only to test the prediction. On the third attempt, aim to remove one unnecessary reversal or guess.
Use the daily challenge for transfer: it prevents you from memorising only a fixed level sequence. Use shared challenges for explanation: send the exact puzzle, compare the first point where your routes differ, and discuss which future option each move preserved.