Resolves YES if Russia takes control of Avdiivka at any point in time by May 31st, according to maps provided by the 

If this location is shaded red on the ISW maps, the market will resolve YES. If this area remains shaded orange or not shaded for the entire time period, resolves NO. Resolution will be based on the ISW maps dated up to and including the deadline date.

The specific location used for this market can be found on the ISW interactive map by simply typing 

The ISW map is updated everyday at 3:00 PM ET.

This location is pictured below with the map as of April 22nd.