if (window.location.hostname == "chessmind.ai" && !window.location.pathname.startsWith('/embed/')) { document.write('<iframe src="https://www.googletagmanager.com/ns.html?id=GTM-TS8C2C58" height="0" width="0" style="display:none;visibility:hidden"></iframe>'); }

U.S. Chess Championships 2026 · Abierto Round 4

GM Samuel Sevian (2708) vs GM Grigoriy Oparin (2638)

Board 4. Result: 0-1. 68 moves. Opening: Rapport-Jobava System (D01).

Key moments

Move 43. b4 — swing
Move 54… c3 — blunder
Move 58. b6 — blunder