Set in a fantasy theatre world, Tom Stoppard and Joe Wright's bold adaptation " starring Keira Knightley and Jude Law " sacrifices the novel's poignancy for creative flairIn Tolstoy, the theatre is often something to be mistrusted, both as art-form and social occasion, a place of absurdity and vanity either side of the footlights. Famously, the one thing he personally disliked in Chekhov was his habit of writing for …