https://peertube.lightnode.ru/videos/watch/52f8d03e-e391-49c6-9532-0a69042d26e6 Chess and Russian checkers etudes, tactics, lessons. Chess and Russian checkers etudes, tactics, lessons. Mon, 27 Jul 2026 01:47:57 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.lightnode.ru https://peertube.lightnode.ru/client/assets/images/icons/icon-96x96.png https://peertube.lightnode.ru/videos/watch/52f8d03e-e391-49c6-9532-0a69042d26e6 All rights reserved, unless otherwise specified in the terms specified at https://peertube.lightnode.ru/about and potential licenses granted by each content's rightholder.