Career
He qualified for the 2015 Personal Digital Cellular World Darts Championship where he lost in the first round against Kevin Painter. BDO International
In September 2014, Kolstov reached the semi-finals of the WDF Europe Cup beating Jeffrey van Engdom, Remco van Eijden, Thomas Junghans, Daniel Larsson and Ross Montgomery along the way before losing to Darius Labanauskas 6–3. He also reached the last 16 of the Romanian Open.
Personal Digital Cellular
2015: First round (lost to Kevin Painter 1–3).