In February 2012, he tied for 1st–3rd with Mateusz Bartel and Pavel Eljanov in the 11th Aeroflot Open. Korobov took clear third place in the Ukrainian Championship of 2013, behind Yuriy Kryvoruchko and Ruslan Ponomariov respectively.
In February 2012, he shared first to third place with Mateusz Bartel and Pavel Eljanov in the 11th Aeroflot Open. Korobov secured clear third position in the Ukrainian Championship of 2013, outperforming Yuriy Kryvoruchko and Ruslan Ponomariov.