JOIN USTrailing 2-4 before this game, Humpy could not survive a persistent onslaught by the younger Chinese and went on to lose her third game in the 10-game match.
The Chinese now leads by a huge 5-2 margin and needs just a draw in the remaining three games to win the championship.
Humpy is now cornered and has no other way but to bounce back. The Indian will however need a huge revival in form and fortunes for this to happen.
It was a Ruy Lopez closed this time as Humpy was looking forward to some complexities having lost the previous game with white.
Yifan, however, showcased her skills in the particular set up with some exemplary display and even as Humpy equalised there were some problems to attend to on the king side for the Indian.
Yifan launched a king side attack with thematic manoeuvres and Humpy had to exchange a couple of minor pieces to neutralise that. However, as the pressure increased, Humpy lost a pawn and had little counterplay in return.
Showing machine-like precision, Yifan exchanged the pieces at will to reach a rook and pawns endgame where her extra pawn ensured that she always stood better.
Humpy tried hard to salvage half a point but it was Yifan's day and the outcome of the game was a certainty after she picked up the second pawn on move 47. The game lasted 97 moves and it was also the longest game so far in the match.
Humpy's bad-form has been the main cause of terrible results in the match and the challenger herself confirmed this in the post match conference.
On whether it was a result of tiredness, Humpy replied, "I don't think it's tiredness, I am simply out of form.