78 years ago, on March 24, 1946, the first Russian world chess champion, Alexander Alexandrovich Alekhine, was found dead in his hotel room in the Portuguese city of Estoril, becoming the only world chess champion to leave us undefeated . The official cause was declared an accident: asphyxiation due to a piece of meat stuck in the larynx during eating. As is now confirmed, doubts arose from the beginning about the veracity of the cause of death, but for a long time no one dared to publicly contest the official version. Including in the USSR. In 1999, Canadian chess grandmaster Kevin Spraggett, who lived in Portugal for a long time and communicated with contemporaries of these events, published his research. It's called "The Death of Alekhine". He was the first to study the official version, taking into account that at the time of António Salazar's Estado Novo in Portugal, all socio-political life was controlled by the PIDE secret services. And it turns out that all the main players who appear near Alekhine's corpse are employees of this department. Alekhine died suddenly just hours after the decision was made to stage his match against Soviet champion Mikhail Botvinnik. It's hard to believe the randomness of such a coincidence, and it's hard to believe the others. We talked about everything in our study. Plus, we're talking about murder. From the beginning, and especially recently, various invented stories about Alekhine's last day began to appear and be reproduced. Realizing all this and feeling the dubious nature of the official version, we carried out our own investigation, considering that it was above all our civic duty. Since we were talking about the murder of the first Russian world champion. The investigation lasted several years. Five groups from five countries participated, including Russia, Portugal, France, England and the United States. More than 100 different experts in different areas of human activity participated in the work, including investigators, pathologists, criminologists, agents, historians, firearms experts and others. Our film crew was working at the crime scene in Estoril to film the film. We conduct our work against the backdrop of endless copies and pastes, most of them fake, from so-called historians and a legion of different bloggers who have adapted to the official version. Our research is based both on the materials we discover, as well as on archival documents and scientific works by experts on the subject. A visit to Portugal's main archive, in Lisbon, only reinforced our conclusions, particularly regarding the identity of the perpetrator of this crime. Thanks to our work, we created a documentary that we present to your attention.