O`brien, JerFIDE ID 25356105Games0Wins2Draws3Losses20%ScorePeak rating—Latest rating—First seenJul 28, 2025Last seenJul 30, 2025Recent gamesDateWhiteResultBlackEventOpeningJul 30, 2025Patel½–½O`brienRound 5: Patel, Keatan - O`brien, JerCaro-Kann Defense: Exchange VariationJul 29, 2025O`brien0–1McGrathRound 4: O`brien, Jer - McGrath, EthanPirc Defense: Austrian AttackJul 29, 2025Booth1–0O`brienRound 3: Booth, Zander - O`brien, JerCaro-Kann Defense: Forgacs VariationJul 28, 2025O`brien0–1ComleyRound 2: O`brien, Jer - Comley, JamieSicilian Defense: Alapin VariationJul 28, 2025O`brien½–½SemenovRound 1: O`brien, Jer - Semenov, IgorCaro-Kann Defense: Advance Variation, Short Variation