Doesn't make a whole lot of sense for Russia to give up a major city. 

Suggested Zvi at: https://thezvi.wordpress.com/2022/03/28/ukraine-post-7-prediction-market-update/

Russia currently occupies the Ukrainian city of Kherson, however, some preliminary reports suggest that they may be losing control of it to the Ukrainian millitary: https://thehill.com/policy/defense/599799-pentagon-russia-has-lost-partial-control-of-first-captured-ukrainian-city

This market resolves yes if, as of the time the market closes, Ukraine controls the majority of raions in Kherson, as judged using reputable media reports and reports from the Ukrainian/Russian governments. The market resolves no if Russian controls the majority of raions.