Grandmaster[1] is a 2012 Indian Malayalam-language action thriller film[2][3] written and directed by B. Unnikrishnan and produced by Ronnie Screwvala and Siddharth Roy Kapur under the production company UTV Motion Pictures.

The film stars Mohanlal as IG Chandrasekhar, a senior IPS officer who begins investigating a series of murders after receiving an anonymous note.

The supporting characters are played by Priyamani, Narain, Anoop Menon, Babu Antony, Jagathy Sreekumar, and Arjun Nandhakumar.

The movie is based on the book The A.B.C Murders by Agatha Christie[6] which was already adapted by Unnikrishnan for the script of a TV series named Black and White.

Chandrasekhar is forced to investigate a string of 3 murders: Alice, a coffee shop owner, Beena Thomson, a famous singer and Chandrika Narayanan, a leading businesswoman.

Around the same time, Chandrasekhar's daughter Dakshayani is preparing for a play under the lead of famous actor Mark Roshan.

The recurring theme of chess is obvious in the game between Chandrasekhar and the Z. Chandrashekhar understands that there is a mastermind behind Victor Rosetti and decides to play a 'queen's gambit' in his own words.

Then, Mark also confessed that, disguised as a priest named Father Alexander, he manipulated Victor, who was a schizophrenic patient, into believing that he had committed the murders himself.

[8] For the leading female role of advocate Deepthi, Unnikrishnan approached Andrea Jeremiah, Sonia Agarwal, and Reemma Sen before signing Priyamani.

[18] Grand Master's Kitchen, a multi-cuisine restaurant opened by director B. Unnikrishnan in 2016 in Palayam, Thiruvananthapuram, was named after the film.