While PSCB's Soumya prevailed over Bhakti Kulkarni of Goa, LIC's Swati was a little lucky to have won her game from an inferior position from the Italian defence.
Both Swati and Soumya now have 3.5 points each from four rounds.
After her reversal against Pratyusha yesterday, defending champion bounced back into reckoning with a 17-move win against Bihar's Neha Singh, who suffered her fourth successive defeat.
Tania Sachdev of Air India secured a hard fought win over K Priyanka of Tamil Nadu in a battle lasting 82 moves.