BDO In September 2014, Koltsov reached the semi-finals of the WDF Europe Cup beating
Jeffrey Van Egdom,
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.
PDC Koltsov won the Russian Qualifying Event for the
2015 PDC World Championship and beat
Haruki Muramatsu of
Japan 4–2 in legs in the preliminary round. He squared his first round match with
Kevin Painter at 1–1 in sets, but could not win another leg after this to be defeated 3–1. He teamed up with Aleksei Kadochnikov to represent Russia at the
World Cup of Darts and they lost 5–1 to Australia in the first round. Koltsov's bid to reach the
2016 World Championship was ended at the semi-final stage by
Aleksandr Oreshkin. He dominated the
Eurasian Darts Tour in 2016 by winning four and losing in one final of the six events staged. Kolstov and Oreshkin were defeated 5–3 by the Netherlands in the opening round of the
World Cup, with world number one
Michael van Gerwen praising Kolstov's play afterwards. He won the Russian qualifier for the
2017 World Championship, but lost 2–1 to
Dragutin Horvat in the preliminary round. Kolstov entered Q School in a bid to earn a PDC Tour Card. He reached the last 16 on day two, but this was not enough to earn him a place on the tour. Koltsov and
Aleksandr Oreshkin met Australia in the second round of the
World Cup after seeing off Hong Kong 5–3 in the first round. Oreshkin beat
Kyle Anderson 4–2, but Koltsov failed to win against
Simon Whitlock meaning a doubles match was required to settle the tie. Russia easily won 4–0 to make it through to the quarter-finals for the first time, where they could only pick up one leg in their singles defeats to the Welsh pair of
Gerwyn Price and
Mark Webster. Koltsov won a PDC Tour Card for the first time at European Qualifying School on 17 February 2021. ==World Championship results==