Unlockle

Unlockle, made by rgthree, swaps letters for the nine dots of a smartphone unlock screen. Each attempt connects five dots in order, by tapping them one by one or swiping the whole pattern. As on a real phone, a line can go from any dot to any other unless it would pass over an unvisited dot in between.

After each try the dots are coloured. Green means the dot is in the solution at that position in the order; yellow means it is in the solution but at a different step; grey means it is not in the pattern at all. Dots keep their colours as you go, though a green dot you leave out of your next attempt turns yellow.

The normal mode shows only your previous path, so you have to remember the earlier ones. Easy mode shows every previous attempt and its order, and hard mode keeps the dot colours but shows none of the paths, so you must remember every attempt. A new Unlockle is available each day, and a stats screen tracks your results.