Honors Program Thesis (UNI Access Only)
Lights out (Game); Games--Mathematics;
Games and puzzles are important to mathematicians because they provide a fun and engaging environment in which to study complex mathematical concepts. One such game is Lights Out, which was released by Tiger Electronics in 1995. This game consists of a 5x5 grid of lights with the state of each light being either on or off. Whenever a light is pressed, the light switches states along with all of the adjacent lights. The goal of the game is to turn all the lights off.
This game has been studied in detail from a wide variety of perspectives. Anderson and Feil  used linear algebra to determine the initial states of the game that are solvable. Torrence  examined games that can be solved simply by pressing all the lights that were on in the initial configuration. Arangala and MacDonald  have studied variations of Lights Out with different configurations of lights. The game has also been studied in terms of σ+-automata  and domination theory .
Mini Lights Out is a variation of Lights Out played on a 4x4 grid of lights. In the 2001 article "Easy Solution to Mini Lights Out," Missigman and Weida  define the parity of a light and use that definition to present a simple solution to the game. This thesis explores parity graphs, which have similar properties to Mini Lights Out. Multiple classes of parity graphs are presented, followed by an explanation of how certain parity graphs can be solved in the same way that Missigman and Weida solved Mini Lights Out. Finally, the results of the paper are generalized to include several new cases.
Date of Award
Department of Mathematics
University Honors Designation
A thesis submitted in partial fulfillment of the requirements for the designation University Honors
1 PDF file (31 pages)
© 2015 Derek Hofland
Hofland, Derek, "Solving Lights Out on parity graphs" (2015). Honors Program Theses. 159.