The Axiom of Real Blackwell Determinacy Daisuke Ikegami, David de Kloet, Benedikt Löwe Abstract: In the theory of infinite games with slightly imperfect information, the main question (whether the axiom of determinacy and the axiom of Blackwell determinacy are equivalent) is still open. In this paper, we shift the discussion to games with uncountably many possible moves, introducing the axiom of real Blackwell determinacy Bl-AD_R (as an analogue of the axiom of real determinacy AD_R). We prove that the consistency strength of Bl-AD_R is strictly greater than that of AD.