The 2-tactic conjecture for the strongly monotonic game

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Let κ\kappa be an infinite cardinal. In the game SMG([κ]<ℵ0)SMG([\kappa]^{<\aleph_{0}}), player ONE plays an increasing sequence of members of the generated ideal and TWO responds with members of [κ]<ℵ0[\kappa]^{<\aleph_{0}}; a winning 2-tactic is a winning strategy for TWO depending only on the last two moves of ONE. The 2-tactic conjecture. Player TWO has a winning 2-tactic in the game

SMG([κ]<ℵ0)SMG([\kappa]^{<\aleph_{0}})

for each infinite cardinal number κ\kappa. The conjecture is motivated by consistency results establishing analogous 2-tactic conclusions for broad classes of cardinals and by the known 3-tactic result for the very strong game. It seeks a ZFC result without additional set-theoretic hypotheses.

References

Primary source

Tomek Bartoszynski, Winfried Just and Marion Scheepers, “Covering games and the Banach-Mazur game: k-tactics”, arXiv:math/9207203 (1992).

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