Get started

1. Choose a Seed to generate an input in Input.
2. Run your solution locally and paste its output into Output.
3. Press ▶ to play the animation. Use the slider to change the display position, and Speed to adjust the playback speed.

Load and save

• Download: save #cases inputs, starting from Seed.
• Select directory: choose a folder of output files and switch between them. Names such as 1234.txt or abcd_1234.txt automatically select seed 1234; other names use seed 0.
• Export: save the current image as PNG, or the animation as GIF or Video at the current Speed.

Reading the grid

• The black dot is Takahashi, and purple rings are magic circles. They may overlap. On the right, p shows Takahashi's coordinates, and Magic circles lists the coordinates of each circle. If multiple circles occupy the same cell, its coordinates appear once for each circle.
• The red dot is the next destination, solid blue dots are unvisited destinations, and light gray rings are visited destinations. Hover to see cell coordinates, destination indices, visit status, and other details in a single tooltip.
• Black lines show the last trail_length operations. trail_length is an integer from 1 to 256, with a default of 16. If fewer than trail_length operations precede the displayed position, all of them are shown. Walking uses solid lines, and teleportation uses dashed lines. Purple dotted lines connect the cell where a circle was removed to the cell where a new circle was drawn during teleportation. On the right, op shows the last operation. J a b means teleporting using a magic circle at (a, b).