The following publications are possibly variants of this publication:
- UNO is hard, even for a single playerErik D. Demaine, Martin L. Demaine, Nicholas J. A. Harvey, Ryuhei Uehara, Takeaki Uno, Yushi Uno. TCS, 521:51-61, 2014. [doi]
- Single-Player and Two-Player Buttons & Scissors Games - (Extended Abstract)Kyle Burke, Erik D. Demaine, Harrison Gregg, Robert A. Hearn, Adam Hesterberg, Michael Hoffmann, Hiro Ito, Irina Kostitsyna, Jody Leonard, Maarten Löffler, Aaron Santiago, Christiane Schmidt 0001, Ryuhei Uehara, Yushi Uno, Aaron Williams. jcdcg 2016: 60-72 [doi]
- Tetris is hard, even to approximateRon Breukelaar, Erik D. Demaine, Susan Hohenberger, Hendrik Jan Hoogeboom, Walter A. Kosters, David Liben-Nowell. ijcga, 14(1-2):41-68, 2004. [doi]
- Hanabi is NP-hard, even for cheaters who look at their cardsJean-François Baffier, Man-Kwun Chiu, Yago Diez, Matias Korman, Valia Mitsou, André van Renssen, Marcel Roeloffzen, Yushi Uno. TCS, 675:43-55, 2017. [doi]