World-record simultaneous chess-playing exhibition.Gjuarat State Bureau/Agence France-Presse—Getty Images Players during simultaneous exhibition in Ahmedabad, India, on Dec. 24.

India not only has the world champion — Viswanathan Anand — it now has the world record for games played simultaneously.

Friday, Dec. 24, about 20,500 people gathered in Ahmadabad, a city in Western India, to break the record for playing simultaneously. The record was certified by the Guinness Book of World Records. The old record was 13,446 people, and was set in Mexico City on Oct. 21, 2006.

Anand was at the simul and played some games. The date was significant for him as he won the World Chess Federation’s championship 10 years earlier in Iran.

As can be seen from the photo above, the participants wore white and black shirts so that they resembled a chessboard.

Anand during the world-record simultaneous exhibitionAjit Solanki/Associated Press Viswanathan Anand, the world champion, played in the world-record setting exhibition in Ahmadabad, India, on Dec. 24.