My chess lecture in Odessa. UPDATED

On 10th February 2019 during an event in the Odessa chess school (Kanatnaya str., 95), devoted to chess studies, I showed two my, rather simple, studies, and the 2006 game against the future GM Esen. Language: Russian. Video is by 048.ua.
Study 1: https://www.youtube.com/watch?v=eQ2PnUQdY-o
Study 2: https://www.youtube.com/watch?v=LoP_Jy77je0
Esen vs Golubev game: https://www.youtube.com/watch?v=LtZuf3cjtbg

Below are variations, prepared to this lecture (and mostly shown or explained), with some added notes in English.