Paul Keres is considered the strongest chess player of all time who has not achieved the title of world champion, which is why he has earned the nickname Eternal Second. With his game mastery, tact and correctness, Keres was valued among the world's chess elite, and for Estonians he was a national symbol. His career is surrounded by unexplained mystery that reflects the tragic confrontations of big politics. The life of Paul Keres is shed light on by his famous rivals, ex-world champions Mikhail Botvinnik, Boris Spasski, Mikhail Tal and others.