Candy Crush Saga is a single-player videogame whose game mechanic is based on the idea of swapping adjacent items of a grid in order to form rows or columns of multiple items of the same kind. It can be considered a variant of Bejeweled.
See the CoG page on Bejeweled.
A playable version of the NP-hardness reduction of [1] is available here.
[1] L. Guala, S. Leucci, E. Natale, “Bejeweled, Candy Crush and other match-three games are (NP-)hard”, in CIG 2014.
@misc{cog:candycrush, author = "{CoG contributors}", title = "{Candy Crush --- Complexity of Games}", year = "2024", url = "https://www.isnphard.com/i/candycrush/", note = "[Online; accessed 2024-05-28]" }