Harika Dronavalli just had to mate with knight+bishop against Tan Zhongyi to survive for the tiebreak, since Tan had won the first classical game. She did wobble a lot and only managed to get potential mate on move 163 (Tan resigned on move 162), when Tan would be able to claim a draw on move 167! Apparently she did not know the W-maneuver with the knight via b3-d4-b5-d6-b7 but had a less efficient maneuver involving Bg6.
Harika, Dronavalli vs Tan, Zhongyi
One remarkable thing is that after 56.Be4!,f5 she did not see the mate after the simple 57.Qe7+,Kxc8 58.Bd3 followed by Ba6(+) and Qb7# checkmate.
One thing I always wondered about the Deletang triangle, it will still not avoid that the opposing King can run back to the wrong corner and stay there, from which only the W-maneuver will work to extract it?