Indian grandmaster Arjun Erigaisi is among 4 co-leaders at the World Rapid and Blitz Chess Championship, alongside Russians Volodar Murzin and Alexander Grischuk and Poland’s Jan-Krzysztof Duda, with 7 points after round 9. The day was overshadowed by Magnus Carlsen’s disqualification for not adhering to FIDE’s dress code.