Answer: Maze 224

Here is the way through Maze 224. The orange line shows Pixel’s route from the top-left corner to the fish.

The route as arrow code

Each arrow is a direction and each number is how many squares to move. The whole route is 38 moves long and has 18 turns.

→ 1  ↓ 1  → 3  ↑ 1  → 4  ↓ 3  ← 1  ↓ 1  → 4  ↑ 2  → 1  ↓ 3  ← 2  ↓ 3  → 1  ↓ 1  ← 1  ↓ 3  → 2

Show the route step by step

1. Go right 1 square.
2. Go down 1 square.
3. Go right 3 squares.
4. Go up 1 square.
5. Go right 4 squares.
6. Go down 3 squares.
7. Go left 1 square.
8. Go down 1 square.
9. Go right 4 squares.
10. Go up 2 squares.
11. Go right 1 square.
12. Go down 3 squares.
13. Go left 2 squares.
14. Go down 3 squares.
15. Go right 1 square.
16. Go down 1 square.
17. Go left 1 square.
18. Go down 3 squares.
19. Go right 2 squares.

Why is there only one way through?

This is a perfect maze. That means there is exactly one path between any two squares, with no loops. It was built by a program that wanders from square to square, knocking down walls as it goes, and backs up whenever it gets stuck. Programmers call that backing-up trick backtracking.

Because there are no loops, the path in the answer is the only way to get from the start to the goal.