On what turned out to be an easy first round, seventh seeded Harikrishna made most of his white pieces in a fluent win out of a Sicilian defense.
De Haan was all at sea after the Indian traded the queens and the Dutchman lost a piece amidst mild tactical complexities. Harikrishna won in just 33 moves.
All Indians in the fray got off a fantastic start in the Rs. 1.7 crore prize money event as all recorded victories in the first round.
Adhiban, however, created enough play on the weakened king side and cashed in after 32 moves.
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Top seed and former world champion Veselin Topalov of Bulgaria played a highly exciting game to beat Miguel Emilio Sanchez Jerez of Spain. Out of a King's Indian fianchetto, Topalov threw everything at black's king and romped home in 33 moves.
With nine rounds still remaining in the highest prize money festival, the biggest upset of the first round was recorded by unheralded Badrakh Galmandakh who sprang a surprise by outwitting renowned Grandmaster Alexander Motylev of Russia.