Yuri Nikolaevich Tyulin (Estonia, 1893 - 1978)

Soviet composer and music theorist 

He lived in the city ​​of Leningrad. Was born in 1893 in the city of Tallinn. 

His profession was Musicologist and composer. Professor of the Leningrad Conservatory. Doctor of Arts.

Honored Artist of the RSFSR.

"Yuri Nikolayevich, the creator of fundamental concepts of music theory, which were developed by him in various branches of musical scholarship: mode, harmony, texture, musical thematicism, motives, musical syntax and musical form as fundamental categories of musical thinking. Yury Tyulin was a scholar, who made a significant contribution to the research of theoretical issues of music of Russia, Armenia, Georgia, Uzbekistan, Kazakhastan, and the Baltic countries." 

Chess:

About his endgame studies:

Since 1923 he composed and published 15 studies and had 4 awards.

His composed chess studies are well thought out and the solutions are long.

Soucre: Dutch Website ARVES.org