Square Square (hard)
This maze first appeared as the monthly maze competition for December 2018.
Start with 0 in the top left corner. Move horizontally or vertically to another number and add that to your total. Continue in this way, making a series of horizontal or vertical steps, each time adding the number you reach to your total. The restriction is that at each step the total must be a perfect square.
Your aim is to find the shortest route to the 15 in the bottom right corner.
To solve this maze you'll need to use a pencil and paper; you can't solve it interactively.
Solution
Click here to display the solution to the Square Square maze after a one-minute delay:
Show solution.