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Solving tips
How to solve Starpath
Starpath asks for one trail that starts on star 1, passes stars 2 to 12 in order, and covers all 64 tiles of the sky exactly once. Puzzles like it are called number path or Hamiltonian path puzzles. The way to solve them is to find the moves the board forces on you, rather than trying routes until one works.
01 · Starpath
Look for forced tiles
In the finished trail, every tile except the two ends has exactly two neighbors in the path: the one before and the one after. So a tile with only two open neighbors, because it sits in a corner or against barriers, must connect to both. Draw those links first.
A tile with only one open neighbor must be an end of the trail. Since the trail starts on star 1, such a tile anywhere else is where the trail finishes, and the route has to arrive there last.
02 · Starpath
Read the barriers as walls
Barriers block the edge between two tiles, which often turns open space into a corridor. A corridor one tile wide has to be walked straight through, in one end and out the other, so treat it as a single long tile when you plan the route.
03 · Starpath
Plan the route between stars
The stars split the trail into legs: 1 to 2, 2 to 3, and so on. Each leg must cover all the tiles that no other leg can reach. If two consecutive stars are close together but there is a large area nearby, one of the legs has to detour through that area.
Avoid touching a later star early. The trail cannot pass over star 7 on the way from 3 to 4, so tiles next to later stars are often off-limits until their turn.
Color the board like a chessboard in your head. Each step moves to the other color, so two stars on the same color are an even number of steps apart, and stars on different colors an odd number. It is a quick way to see that a short leg has to wander.
04 · Starpath
Never strand a tile
The most common mistake is a trail that cuts off a pocket of tiles it can never come back to. Before committing a long line, check that every open area it leaves behind still has a way in and a way out. If part of the trail goes wrong, trim back to the last tile you were sure about rather than starting over.
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