A Russian chess player is under investigation for allegedly attempting to poison another player ahead of a match last week.
Security video shows the chess player Amina Abakarova smearing what is alleged to be mercury on a chess board later used by rival Umaiganat Osmanova.
Osmanova said she began feeling unwell soon later, complaining of nausea and dizziness, and security camera footage of the incident launched a police investigation into Abakarova, an article from Chess.com said.
