Abstract
Often, a given selection game studied in the literature has a known dual game. In dual games, a winning strategy for a player in either game may be used to create a winning strategy for the opponent in the dual. For example, the Rothberger selection game involving open covers is dual to the point-open game. This extends to a general theorem: if {range(f):f∈C(R)} is coinitial in A with respect to ⊆, where C(R)={f∈(⋃R)R:R∈R⇒f(R)∈R} collects the choice functions on the set R, then G1(A,B) and G1(R,¬B) are dual selection games.
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