Buried in special counsel Robert Mueller's 400-plus page report is the question of whether then-president-elect Donald Trump attended a 2016 championship chess tournament — an event that came under scrutiny as Mueller probed possible collusion between Trump's orbit and the Russian government. Although Trump said he did not attend the event, he told Mueller in written answers that he became "aware of documents indicating" that then-president of the World Chess Federation (FIDE) Kirsan Ilyumzhinov — a sanctioned Russian power player — invited the Trump Organization in March 2016 to host the tournament at Trump Tower. "I do not remember having...