Lucas' problem is quickly solved with this software solution.

You can swap arrow positions by clicking on a tile, and it will move to the empty space in the direction that its arrow is pointing. Alternatively, you can jump over an opposite-color arrow and move to a blank space. Once an arrow has moved to the front, it can't move backward. For example, a purple arrow pointing to the right cannot move left after moving right.
If you get stuck, click the Reset button under the puzzle to start again. Be sure to keep an eye on the score displayed at the top of the screen and act quickly before it counts down to zero. Will you prove yourself to be among the brightest league of mathematicians? Test your problem-solving skills with this fun and addictive game!
Version 1.12.1: Added 4 language versions