Payoff imbalance in Nash equilibria of the imbalanced (m,2k+1)(m,2k+1)-RPS game

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Consider the given imbalanced (m,2k+1)(m,2k+1)-RPS game and a Nash equilibrium NN. Let Pi(S)P_i(S) be the probability that player ii plays SS, and let Pi(Tp)P_i(T_p) be the probability that player ii plays any PP-type object. Imbalance conjecture. For every player ii,

Pi(Tp)Pi(S)m1.\frac{P_i(T_p)}{P_i(S)}\geq m-1.

Moreover, for any k>1k>1 and player qiq_i, the expected number of other players tying with qiq_i for the win occurring for PkP_k is less than m2m-2. The conjecture is intended to support a proof that the constructed imbalanced (m,2k+1)(m,2k+1)-RPS game is strongly playable; the source offers only a heuristic based on the rapidly decreasing probability of playing SS in the symmetric three-object Nash equilibrium.

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Sources & referencesView supporting material

Primary source

Itai Maimon, “Different Forms of Imbalance in Strongly Playable Discrete Games II: Multi-Player RPS Games”, arXiv:2511.13736 (2025).

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