Cobicistat is a drug that was originally devised for HIV/AIDS therapy. Now a new study shows that it can inhibit the replication of SARS-CoV-2 – which would mean we could have a powerful therapeutical drug against Covid-19. Very encouraging news – but why are we reporting this on a chess news page? Because one of the virologists working on the project happens to be a chess grandmaster. Here's his story. | Photos Lara Gallucci.