Instruct: Classify a given review into positive or negative sentiment.
Query: A hypnotic puzzle!

Deep red is one of the unforgettable classic cult movies of the horror. Bloody, tense and magnificentlywell written, with a bleak atmosphere of Roma by night.A sadistic murder is watched by an Englis Jazz pianist (I have the suspect that Argento paid a deserved tribute to Michelangelo Antonioni in Blow up, due hemings was a vital witness in that film).Since this incident our hero artist will to assume by his own, following every single track until the great finale absolutely unexpected but masterfully suppported.Don't doubt it for a minute. This is Dario Argento's masterpiece.