Paul Keres travelled to Spain in 1943 and moved to Sweden in 1944. At the end of World War II, he returned to Estonia in Autumn 1944. He was harassed by the Soviet authorities (KGB) and feared for his life. Fortunately, Keres managed to avoid deportation to Siberia or any worse fate (e.g., that of Vladimirs Petrovs) – a letter to Viacheslav Molotov spared his life – but his return to the international chess scene was delayed, in spite of his excellent form. He returned to international play in World Chess Championship 1948 but, as some historians argue, had to lose to Mikhail Botvinnik. Keres died from a heart attack in Helsinki in 1975.