Hidden moving trail
Update possible locations from legal hidden moves and periodic public sightings.
Observation & recall
- Players
- 2–4
- Time
- 15–25 minutes
- Materials
- Two matching 4×4 maps, private route log and six guess boxes.
Prepare
Use columns A–D and rows 1–4 with no walls. One hider secretly chooses a starting square and writes it on the private log before any guesses. One to three searchers share one public map and one guess per round. There are no real hiding places, blindfolds or room searches; everyone stays at the table.
Play
Each round the hider must move exactly one side-adjacent square and privately record the new location. Staying still, moving diagonally or leaving the map is illegal. Revisiting a square is allowed. The searchers then discuss and announce exactly one square. A correct guess catches the token and ends the game; a miss reveals no distance or direction.
Worked example
After an uncaught round 3, the hider publicly reveals the current location. This is a sighting at the end of round 3, not the original starting square. The hider moves again before the round 4 guess. A sighting at B2 gives possible next cells A2,C2,B1,B3; it does not permit a round 4 guess at B2 to catch a token that has legally moved.
Finish and check
Complete at most six moves and six guesses. If not caught after round 6, the hider wins. Reveal the whole route so both sides can check every side-step and the round 3 sighting. Any illegal move or false catch response voids the round’s result: use it as an unscored practice record rather than blaming a searcher for impossible information.
Adaptation and limits
Rotate the hider for another short game, with a new secret start and cleared notes. A helper can write the private route while keeping it hidden from searchers. The public record should separate guesses, misses and the one sighting. No one may change an earlier written location after hearing a guess.
Purpose, observation and provenance
Within this activity: Update possible locations from legal hidden moves and periodic public sightings.
Name a legal action, record the changed state and explain the check. One session does not measure lasting ability.
Our rules, examples and printable diagrams are separately prepared. The earliest inventor of the broader mechanism is not established here.
Free alternative: Copy the supplied grids, labels and cards onto reused paper. No specialist product is needed. Adults may prepare pieces or act as a scribe.
Printable materials
Preview at 100% scale, with browser headers and footers off. Cut with suitable help. Keep host keys separate. This is a manual tabletop kit, not an online opponent, automatic judge or solver.
Rules to keep beside the materials
- Use columns A–D and rows 1–4 with no walls. One hider secretly chooses a starting square and writes it on the private log before any guesses. One to three searchers share one public map and one guess per round. There are no real hiding places, blindfolds or room searches; everyone stays at the table.
- Each round the hider must move exactly one side-adjacent square and privately record the new location. Staying still, moving diagonally or leaving the map is illegal. Revisiting a square is allowed. The searchers then discuss and announce exactly one square. A correct guess catches the token and ends the game; a miss reveals no distance or direction.
- After an uncaught round 3, the hider publicly reveals the current location. This is a sighting at the end of round 3, not the original starting square. The hider moves again before the round 4 guess. A sighting at B2 gives possible next cells A2,C2,B1,B3; it does not permit a round 4 guess at B2 to catch a token that has legally moved.
- Complete at most six moves and six guesses. If not caught after round 6, the hider wins. Reveal the whole route so both sides can check every side-step and the round 3 sighting. Any illegal move or false catch response voids the round’s result: use it as an unscored practice record rather than blaming a searcher for impossible information.
- Rotate the hider for another short game, with a new secret start and cleared notes. A helper can write the private route while keeping it hidden from searchers. The public record should separate guesses, misses and the one sighting. No one may change an earlier written location after hearing a guess.
Hidden moving trail — play materials
Private map: keep behind a paper screen.
| Start / round | Private current location |
|---|---|
| Start | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 |
Public search map — separate from private route
| Round1–6 | One shared guess | Hit / miss | Round3 disclosure |
|---|---|---|---|
| ________ | ________ | ________ | ________ |
| ________ | ________ | ________ | ________ |
| ________ | ________ | ________ | ________ |
| ________ | ________ | ________ | ________ |
| ________ | ________ | ________ | ________ |
| ________ | ________ | ________ | ________ |
Host check — keep private until finished
Sighting B2 after round 3 yields A2,C2,B1,B3 before round 4. Six uncaught legal moves wins for the hider. A miss gives no distance.
These are model answers or legal examples, not records of an experiment or learner outcomes.
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Activity library · Grid fleet search — Free Printable PDF & Rules