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CAPS 2018 Problem 2

    Let ABCABC be an acute scalene triangle. Let DD and EE be points on the sides ABAB and ACAC , respectively, such that BD=CEBD=CE . Denote by O1O_1 and O2O_2 the circumcentres of the triangles ABEABE and ACDACD , respectively. Prove that the circumcircles of the triangles ABC,ADEABC, ADE , and AO1O2AO_1O_2 have a common point different from AA .

    Proposed by Patrik Bak, Slovakia

    Dataset text AI-MO AoPS. Quoted with source.

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