The final hours of chess grandmaster Daniel Naroditsky - friends' desperate attempts to save him, warnings in final monologue and how he was haunted by sinister figure in hidden underworld. Special report by RIATH AL-SAMARRAI

The grandmaster's final moves are preserved in heartbreaking footage. It is distressing, raw and long, running to two and a half hours and depicts the penultimate morning of Daniel Naroditsky's life.