"You have won this much deserved title after intense, nerve-racking rapid tie-breaker games and proved your prowess in rapid and blitz chess. You have brought laurels both to Tamil Nadu and India," she said in a letter to Anand.
Congratulating Anand on his "magnificent victory," she wished he continued to retain the title for many more years.
Anand retained the World Chess Championships title, his fifth crown and fourth in-a-row on Wednseday after beating Israel's Boris Gelfand in a tense rapid game tie-breaker in Moscow.
