Game players often get stuck, either not seeing how to properly use an object in the game or perhaps persisting in an inefficient strategy. I discuss two such mental sets, functional fixedness and Einstellung.
Game References
Burgle Bros, Defender, Go, Hanabi, Hoizon Zero Dawn, Overwatch, Root, Tetris
Mutilated Checkerboard:
https://en.wikipedia.org/wiki/Mutilated_chessboard_problem
Defender:
http://www.folklore.org/StoryView.py?story=Make_a_Mess,_Clean_it_Up!.txt
Research References
Adamson, R. E. (1952). Functional fixedness as related to problem solving: A repetition of three experiments. Journal of experimental psychology, 44(4), 288-291.
Bard, N. and colleagues (draft). The Hanabi Challenge: A New Frontier for AI Research. Download at: https://arxiv.org/pdf/1902.00506.pdf
Duncker, K., & Lees, L. S. (1945). On problem-solving. Psychological monographs, 58(5).
Luchins, Abraham S. (1942). Mechanization in problem solving: The effect of Einstellung. Psychological Monographs. 54 (6): i–95.