Introduction
Viktoriia Kubata, better known on the platform as Vitachess79, is a Woman International Master with a fearless approach to online chess. She prefers the slower rhythm of Daily chess, but her account is a monument to Blitz volume. From a modest Blitz rating in 2019, she climbed to a career peak of 2553 (2026-08-20) in 2026. The full arc of that climb is best seen in her rating chart:
.Playing Style and Repertoire
Kubata is an opening adventurer. With White she almost always opens with 1.e4, which leads her into main lines like the Caro-Kann Defense and the Scandinavian Defense, as well as the French Defense. With Black she regularly defends the Ruy Lopez and takes on the Sicilian Defense in all its forms. She also enjoys hidden gems such as the Blackburne Shilling Gambit and the Amazon Attack, making preparation against her a real challenge.
Her games are not quick sprints. Winning efforts average more than 76 moves, and she reaches the endgame in nearly 86 percent of her games. That patience pays off in remarkable resilience: she has a comeback rate above 91 percent, and even after losing a piece she still manages to win 42 percent of the time. Her opening performance across all formats is summarized here:
.Rivalries and Durability
Kubata has built a loyal circle of frequent opponents. Zehro Zahirovic has faced her 25 times, while rem1958 has met her in 24 battles. These long rivalries show her durability in a world where most players run away from tough matchups.
Her longest winning streak reached 16 games, and her longest losing streak of 13 games did not slow her down. She also owns an unbeaten Rapid record in logged encounters, with eight wins and one draw. Whether she is grinding Daily games or blitzing into the night, with her best results coming around 22:00, Viktoriia Kubata plays chess with intensity, humor, and a stubborn love of the fight.