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MEMO 2024 I3

    Let ABCABC be an acute scalene triangle. Choose a circle ω\omega passing through BB and CC which intersects segments ABAB and ACAC again in points D≠AD \neq A and E≠AE \neq A, respectively. Let FF be the intersection of BEBE and CDCD. Let GG be the point on the circumcircle of ABFABF such that GBGB is tangent to ω\omega. Similarly, let HH be the point on the circumcircle of ACFACF such that HCHC is tangent to ω\omega. Prove that there exists a point T≠AT \neq A, independent of the choice of ω\omega, such that the circumcircle of AGHAGH passes through TT.

    Official text Middle European Mathematical Olympiad 2024 official paper, page 1. Quoted with source.

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