Kostov, Magnus Constantine7Games2Wins2Draws3Losses43%ScorePeak rating—Latest rating—First seenMay 22, 2026Last seenMay 25, 2026Recent gamesDateWhiteResultBlackEventOpeningMay 25, 2026Kostov0–1ObatayaSwiss Youth Championship 2026 U12Sicilian Defense: Old SicilianMay 24, 2026Kostov1–0LegeretSwiss Youth Championship 2026 U12Italian Game: Two Knights Defense, Modern Bishop's OpeningMay 24, 2026Carnevale-Arella1–0KostovSwiss Youth Championship 2026 U12Ruy Lopez: Exchange, Alekhine VariationMay 23, 2026Amstalden½–½KostovSwiss Youth Championship 2026 U12Italian Game: Giuoco Pianissimo, Italian Four Knights VariationMay 23, 2026Kostov½–½KononiukSwiss Youth Championship 2026 U12French Defense: Rubinstein Variation, Fort Knox VariationMay 22, 2026Bachmann0–1KostovSwiss Youth Championship 2026 U12Italian Game: Classical Variation, Giuoco PianissimoMay 22, 2026Aubier1–0KostovSwiss Youth Championship 2026 U12Queen's Pawn Game