\documentclass[11pt]{scrartcl}
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\begin{document}
\title{JMO 2026/4}
\subtitle{Evan Chen}
\author{Twitch Solves ISL}
\date{Episode 176}
\maketitle

\section*{Problem}
Triangle $ABC$ has circumcircle $\omega$ and circumcenter $O$.
Lines $AO$ and $BC$ meet at point $D$.
Let $X$ be the $A$-excenter of $\triangle ABD$ and let $Y$ be the $A$-excenter of $\triangle ACD$.
Prove that if $X$ lies on $\omega$, then $Y$ also lies on $\omega$.

\section*{Video}
\href{https://youtu.be/dhI18BfnHUs}{\texttt{https://youtu.be/dhI18BfnHUs}}

\section*{External Link}
\url{https://aops.com/community/p37586265}

\newpage

\section*{Solution}
To be added. (Angle chasing, but super annoying.)

\end{document}