“Molly’s Game” (***1/2 out of four) was a crackling true story of Molly Bloom (Jessica Chastain) who was an Olympic-level skier who became involved in running high-stakes poker games for actors and politicians and later became a target of an F.B.I. investigation and court case. Chastain is terrific in the best performance of her career and enhances a razor-sharp screenplay by both Bloom and Aaron Sorkin that encompasses big business, politics, addiction, and corruption. This also marks Sorkin’s smashing directing debut. Idris Elba is outstanding as usual also as Bloom’s tough but supportive lawyer and Kevin Costner has a strong supporting role as her idealistic dad.