The expert added that this figure is declining LUGANSK, February 15. /TASS/. Only 20% of Chasov Yar in the Donetsk People’s Republic (DPR) is controlled by units of the Ukrainian armed forces, military expert Andrey Marochko told TASS. "All in all, the enemy only controls around 20% of Chasov Yar, which is also decreasing," he said.