Not pleasant for another reason than Peters being a communist praising the achievements of the USSR? I haven't studied the subject in detail, because an unsolv

Not pleasant for another reason than Peters being a communist praising the achievements of the USSR? I haven't studied the subject in detail, because an unsolvable problem is... eh... unsolvable. A quick web search did not bring up anything to compare those 2 (or others suggested here) on a quick glimpse.