Erdős 1220 — qed.bot Claims, announcements and changes recorded against Erdős 1220. https://qed.bot/feeds/s/erdos-1220.xml 2026-09-27T08:37:38Z qed.bot Fidelity regraded: Erdős 1220 urn:qed:change:fidelity:erdos:1220:F2 2026-09-27T08:37:38Z The fidelity grade for Erdős 1220 moved from F0 to F2.