Some authors believe that the Great Game came to a close with the three Anglo-Russian agreements of 1907 which delineated spheres of interest between British India and Russian Central Asia in the borderland areas of Persia, Afghanistan, and Tibet. Another notes that it was trailing off not long after that time, and another sets the endpoint with the Bolshevik Revolution in 1917 and the end of Russia's interest in Persia. Konstantin Penzev has stated, echoing Kipling's fictional summary, that unofficially the Great Game in Central Asia will never end.