What is the author's style in King Richard III by William Shakespeare?

Shakespeare's play varies from its sources in numerous ways but two are of particular importance: First, although Shakespeare borrowed Thomas More's ironic narrative tone, he placed it in Richard's mouth, so that the character becomes a complex, semi-comical villain who laughs at himself and others even while he is plotting to do harm.

Richard III also functions as a sequel to Shakespeare's trilogy of plays—Henry VI, parts one, two, and three which brings us to the second of Shakespeare's significant modifications: In Richard III, Margaret, widow to Henry VI (a Lancastrian king who was murdered by Richard in Henry VI, part three), remains in England where the play is set rather than sailing home to France as she did according to history. Onstage, Margaret voices her opinion on the action in the play, and predicts doom and misery as her revenge on Richard and his supporters. In doing so, Margaret serves the same function in the drama as a chorus would. Individual choric figures or a chorus are sometimes used to describe events which occur before the beginning of the play or to comment on the action of the playas it unfolds.