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Rulesets for Beatty games

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Abstract

We describe a ruleset for a 2-pile subtraction game with P-positions \(\{(\lfloor \alpha n \rfloor ,\lfloor \beta n \rfloor ) : n \in \mathbb Z_{\ge 0} \}\) for any irrational \(1< \alpha < 2\), and \(\beta \) such that \(1/\alpha +1/\beta = 1\). We determine the \(\alpha \)’s for which the game can be represented as a finite modification of t-Wythoff (Holladay, Math Mag 41:7–13, 1968; Fraenkel, Am Math Mon 89(6):353–361, 1982) and describe this modification.

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References

  • Beatty S (1926) Problem 3173. Am Math Mon 33:159

    Article  Google Scholar 

  • Cassaigne J, Duchêne E, Rigo M (2016) Nonhomogeneous Beatty sequences leading to invariant games. SIAM J Discrete Math 30:1798–1829

    Article  Google Scholar 

  • Coxeter HSM (1953) The golden section, phyllotaxis and Wythoff’s game. Scr Math 19:135–143

    Google Scholar 

  • Duchêne E, Fraenkel AS, Nowakowski RJ, Rigo M (2010) Extensions and restrictions of Wythoff’s game preserving its \({P}\)-positions. J Combin Theory Ser A 117:545–567

    Article  Google Scholar 

  • Duchêne E, Parreau A, Rigo M (2017) Deciding game invariance. Inf Comput 253:127–142

    Article  Google Scholar 

  • Duchêne E, Rigo M (2010) Invariant games. Theor Comput Sci 411(34–36):3169–3180

    Article  Google Scholar 

  • Erdös P, Graham RL (1980) Old and new problems and results in combinatorial number theory. Université de Genéve, L’Enseignement Mathématique, Geneva

    Google Scholar 

  • Fisher MJ, Larsson U (2011) Chromatic Nim finds a game for your solution. Cambridge University Press, Cambridge. To appear in: Larsson U (ed) Games of no chance 5, Proceedings of BIRS workshop on combinatorial games, vol 70, 2011, Banff, MSRI Publications

  • Fraenkel AS (1982) How to beat your Wythoff games’ opponent on three fronts. Am Math Mon 89(6):353–361

    Article  Google Scholar 

  • Fraenkel AS (2013) Beating your fractional Beatty game opponent and: what’s the question to your answer? In: Advances in combinatorics, vol 63. Springer, Berlin. In Memory of Herbert S. Wilf, Proceedings of Waterloo workshop on computer algebra, 2011, IS Kotsireas and EV Zima (eds)

  • Fraenkel AS (2015) The rat game and the mouse game. In: Nowakowski RJ (ed) Games of no chance 4, Proceedings of BIRS workshop on combinatorial games, 2008, Banff, vol 63. MSRI Publ., Cambridge University Press, Cambridge

    Google Scholar 

  • Fraenkel AS, Larsson U (2011) Take-away games and the notion of \(k\)-invariance. Cambridge University Press, Cambridge. To appear in: Larsson U (ed) Games of no chance 5, Proceedings of BIRS workshop on combinatorial games, vol 70, 2011, Banff. MSRI Publications

  • Fraenkel AS, Larsson U (2017) Games on arbitrarily large rats and playability (preprint)

  • Goldberg L, Fraenkel AS (2013)Extensions of Wythoff’s game (preprint)

  • Golomb SW (1966) A mathematical investigation of games of “take-away”. J Combin Theory 1(4):443–458

    Article  Google Scholar 

  • Hardy GH, Wright EM (2008) An introduction to the theory of numbers, 6th edn. Oxford University Press, Oxford

    Google Scholar 

  • Ho NB (2012) Two variants of Wythoff’s game preserving its \({P}\)-positions. J Combin Theory Ser A 119:1302–1314

    Article  Google Scholar 

  • Holladay JC (1968) Some generalizations of Wythoff’s game and other related games. Math Mag 41:7–13

    Article  Google Scholar 

  • Larsson U (2012) The \(\star \)-operator and invariant subtraction games. Theor Comput Sci 422:52–58

    Article  Google Scholar 

  • Larsson U, Hegarty P, Fraenkel AS (2011) Invariant and dual subtraction games resolving the Duchêne–Rigo conjecture. Theor Comput Sci 412(8–10):729–735

    Article  Google Scholar 

  • Larsson U, Weimerskirch M (2013) Impartial games whose rulesets produce given continued fractions (arXiv preprint). arXiv:1302.0271

  • Wythoff WA (1907) A modification of the game of Nim. Nieuw Arch Wiskd 7:199–202

    Google Scholar 

  • Yaglom AM, Yaglom IM (1967) Challenging mathematical problems with elementary solutions., vol II. Holden-Day, San Francisco (translated by J. McCawley, Jr., revised and edited by B. Gordon)

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Correspondence to Aviezri S. Fraenkel.

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Goldberg, L., Fraenkel, A.S. Rulesets for Beatty games. Int J Game Theory 47, 577–594 (2018). https://doi.org/10.1007/s00182-017-0594-6

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