Link every square into a single numbered path, where each arrow points the way to the square that comes next.
In Signpost Arrow Chain, every square on the grid acts like a road sign. Each one shows an arrow, and a few also show a number. Your job is to join the whole grid into a single ordered sequence, starting at 1 and ending at the highest number, so that every arrow points toward the square that comes after it.
It is a good fit for anyone who likes following clues both forward and backward until everything clicks into place.
Rules in brief
The grid has exactly one square for each number in the chain. A 4x4 board therefore holds the numbers 1 through 16. You always get to see where the sequence starts and ends, and the final square shows a star in place of an arrow. Some boards give you a few middle numbers as well.
The next square in the chain can be any distance away, as long as it sits on the line of the arrow. That line can be straight or a perfect diagonal, and any squares in between are simply passed over. Pressing on a square lights up every square it is allowed to link to.
Getting started
To make a link, drag forward to the square that comes next. A right-drag works in reverse and joins a square to its predecessor. When a chain of linked squares touches a numbered square, the whole chain fills in with real numbers.
Chains that are not yet tied to a number get temporary letter labels such as a and a+1. The next loose chain uses b, and so on. To break the links on one square, drag it off the grid. Right-drag any square of a chain off the grid to break up the entire chain.
Two small visual cues help a lot. A dot in a square’s bottom-left corner means nothing points into it yet. An arrow turns grey once that square already has a successor.
Strategy notes
- Start from the end. Only squares aiming at the last square can be the one right before it.
- Hunt for squares that only a single arrow can hit. The square owning that arrow is their predecessor.
- If an arrow passes over only one open square that still has a dot, you have found its successor.
- Build lettered chains early. They often lock into place once one end reaches a number.
- Ignore squares without a dot when looking for a successor. They already have a predecessor.
Board options
Six presets run from 4x4 up to 7x7, and custom sizes are available too. Some presets use free ends, which means square 1 and the last square can sit anywhere instead of the usual top-left and bottom-right corners. Both are still shown at the start.
Controls
| Action | Keyboard | Mouse | Touch |
|---|---|---|---|
| Link a square to the one that comes next | Arrow keys to move, Enter on the first square, Enter again on the next | Left-drag from a square to its successor | Drag from a square to its successor |
| Link a square to the one that comes before it | Space on a square, then Space again on its predecessor | Right-drag from a square to its predecessor | Press and hold, then drag (or set Tap to Link backward) |
| Break the links of one square | — | Left-drag the square off the grid | Drag the square off the grid |
| Break a whole chain | — | Right-drag any square of the chain off the grid | Press and hold, then drag off the grid |
| New game, undo, redo | N, U, R | Menu buttons above the grid | Menu buttons above the grid |
Signpost Arrow Chain FAQ
Can I play Signpost Arrow Chain on a phone or Chromebook?
Yes. On a touch screen, drag a finger from any square to its successor, or press and hold before dragging to link backward. On a Chromebook, you can drag with the trackpad or use the arrow keys with Enter and Space. N, U and R start a new game, undo and redo.
Is there a timer or opponent?
Neither. It is a solo logic puzzle with no clock, so you can work through each board at your own pace. Every step can be reasoned out from the arrows and the numbers already shown.
How do I know the puzzle is solved?
The board is complete when every square belongs to one chain running in order from 1 to the last number. A victory effect plays at that point, and you can change its style in the Preferences menu.
What can I do if I am stuck?
Try working backward from the final square, since only squares whose arrows aim at it can come right before it. Undo and redo have no limit, and a Solve option will reveal the answer if you want to check your work.
