Tom C. van der Zanden, Hans L. Bodlaender. PSPACE-Completeness of Bloxorz and of Games with 2-Buttons. In Vangelis Th. Paschos, Peter Widmayer, editors, Algorithms and Complexity - 9th International Conference, CIAC 2015, Paris, France, May 20-22, 2015. Proceedings. Volume 9079 of Lecture Notes in Computer Science, pages 403-415, Springer, 2015. [doi]
Abstract is missing.