He invented a theme and a paradox that bear his name : "Rudenko Paradox: defense of a black piece consists in attack on the square from which a white piece delivers mate in the threat; in response to the defense this move by White becomes his 2nd move sacrifice on the attacked square." He is also the author of one of the best chess problem composition book ever written "Presledovanije tiemy". He proposed the date of January 4th as International Day of Chess Composition. His problems reached space levels when his threemover of Suomen Shakki 1957, 1st prize, was aboard the mission SOYUZ 9 (it is now on display in a museum in Cheboksary - source Wikipedia.de).