Kostenko is a four-time Kazakhstan national champion in classical chess. One of his games at the tournament was against
S. P. Sethuraman, which ended in a loss. At the
Dubai Open Chess Tournament in 2016, Kostenko played a game against
Sandipan Chanda that lasted 5 hours and 142 moves--the longest game of the tournament. The two ended their game in a draw. In January 2020, Kostenko played in a
round-robin tournament in
Chelyabinsk as "training." In May 2021, he competed in the Zone 3.4 Open Championship. He placed 3rd out of 10 with 6½ points. In December 2022, Kostenko placed 9th out of 14 in the Kazakhstan Chess Championship with 5½ points. == References ==