Use this to set the colors you want for each puzzle! We have written the standard colors for each side, but feel free to change them however you like. NB! For 2x2-7x7, we also have weak colors defined, which is used in some trainers.
Click any non-center sticker to set its target character. On desktop, click the sticker and press a key. On touch devices, tap the sticker and enter a single character. Corner targets must stay unique among corners, and edge targets must stay unique among edges. The priority lists are used for permutation cycle breaks only, in the order you write them.
Practice prediction by viewing a "before" state and deciding whether the shown algorithm result matches the "after" state. Use the Start button to begin a session.
Drag to reorder. Invalid triggers are marked red.
Drag to reorder. Duplicate algorithms are marked in yellow. Each entry maps an algorithm to a short name.