Marrying the dandy prince, the princess wants to usurp the throne

She is a poison doctor from the 23rd century. She traveled through time and space and became the unloved eldest daughter of the royal family. Her father used her as a stepping stone to pave the way for her sister. An imperial decree gave her to the dandy in the capital who everyone avoided. Everyone was laughing at her and waiting for her downfall. But she wanted to go against the will of heaven and become the biggest chess player! She wanted to seek the throne, control life and death, and open up a life path that belonged to her. But, the dandy prince who married her, why did you also play the same chess game with me and control the same world? ...