Meet KoshkaMatrioshka
Svyatoslav Korneev Leskova, better known to chess fans as KoshkaMatrioshka, is a FIDE Candidate Master, a streamer, and one of the most relentless bullet chess players on the platform. His username may translate to something like "cat nesting doll," but there is nothing cute about facing him when the clock is low. He turns the board into a whirlwind of fast moves, clever tricks, and surprising comebacks.
Bullet Career Highlights
KoshkaMatrioshka's preferred time control is bullet, and his rating history tells the story of a player who kept climbing. Starting in 2018 in the low 2000s, he crossed 2500 by 2021, touched 2700 in 2023, and reached a scorching 2914 (2026-09-09) bullet peak in 2026. Along the way he piled up more than 2,000 bullet wins and an 87.2 percent comeback rate, meaning he is dangerous even when the position looks lost.
His blitz game is nearly as impressive, peaking above 2800, while rapid sits comfortably above 2400. He clearly saves his deepest love for the one-minute game, where his 35 game winning streak shows what happens when the cat gets the cream.
Style and Opening Repertoire
As White, Svyatoslav is a loyal fan of the English Opening, and he has played its Agincourt Defense more than 500 times. As Black, he is just as comfortable defending with the French Defense, where his results are consistently strong. He rarely resigns early, fights to the end, and has even won 55 percent of games after losing a piece. Opponents often think they have him, only to watch the matryoshka reveal another layer.
- Favorite white setup: English Opening, Agincourt Defense and related reversed systems.
- Favorite black response: French Defense, including the Winawer and Advance variations.
- Finish style: more wins by timeout than checkmate, a true bullet specialist's habit.
Rivalries and Records
No player has crossed swords with KoshkaMatrioshka more than arualplays, who faced him 165 times. It was a one-sided rivalry: arualplays managed just 6 wins while Svyatoslav took 159. He has also traded blows with GMRusty and lord_archimonde, but his record against arualplays remains the stuff of bullet legend.
His best hours are reportedly around 4 a.m., so night owls beware. On Fridays his win rate jumps above 63 percent, making the end of the work week a dangerous time to queue up against him.
Streamer and Showman
As a streamer, KoshkaMatrioshka brings the energy of a bullet arena straight to the chat. He plays fast, talks faster, and somehow makes a 1+0 time scramble look like a carefully rehearsed dance. Whether he is stacking wins in the English Opening or swatting away the French Defense, his viewers know they are watching a Candidate Master who truly loves the chaos of speed chess.