Signpost

Signpost is a uniquely charming and logical path-building puzzle. The game presents you with a grid partially filled with numbered squares and directional arrows (such as ↑, →, ↗, etc.). Your task is to connect all the squares into a single continuous path that starts at 1 and ends at N (where N is the total number of squares), visiting every square exactly once, while respecting the arrows as movement clues.

Each arrow indicates the direction from that square to the next square in the sequence. For example, a right arrow (→) in square 5 means that square 6 must be immediately to its right. Numbered squares are fixed waypoints—you cannot change their positions or values—but many squares are initially blank, and it's your job to deduce their correct numbers and connections based on the given arrows and the requirement of a single unbroken path.

What makes Signpost especially elegant is how it blends sequential logic with spatial reasoning. Every arrow constrains the possible location of the next number, and every blank square must be filled in a way that maintains path continuity without branches or loops. The puzzle is always uniquely solvable through pure deduction—no guessing required.

You are given a grid of squares. Each square (except the last one) contains an arrow, and some squares also contain numbers. Your task is to connect the squares to form a continuous sequence of numbers starting at 1, where each number leads to the next in the direction indicated by the arrow—so the arrow in the square labeled 1 points toward the square containing 2, which in turn points to the square containing 3, and so on.

The next square in the sequence can be any distance away from the current one, as long as it lies somewhere along the direction of the arrow (e.g., anywhere to the right for a → arrow, or anywhere diagonally up-left for a ↖ arrow).

By convention, the first and last numbers (1 and N) are always shown, and one or more intermediate numbers may also be given at the start to help guide your solution.

Connect all the squares into a single sequence so that each square's arrow points toward the square that follows it (though the next square may be any distance away in that direction).

Left-drag from a square to the one that should follow it, or right-drag from a square to the one that should precede it.

To break connections, left-drag a square off the grid to remove all links to and from it. Right-drag a square off the grid to remove it and every square in its connected chain.