The Queen Gambit is a move in the chess. It says - is to temporarily sacrifice a pawn to gain control of the centre of the board.
Today Ridhima has made her first move against Kabir. By saying she will kill herself if he won't burn the files and evidence against Vansh.
She is clear today. Her target is set. She enacted as if she drunk poison and made Kabir a fool for a couple of minutes. She knows if she dies, having the VR mansion and property on his name would be a tough road. So she tried to temporarily sacrifice herself to reach the centreboard.
Ishani is mad at Ridhima because she is trying to give Vansh place to someone. She tries to kill her by giving poison. However, the way Angre is stopping her says more. He wants to confess everything to her but looks like stopping himself due to a big game as he mentioned. He doesn't want Ridhima to die because neither Vansh wants it - at this point.
When Roka was happening, makers showed us Vansh who is doing exercise aggressively. Though Vihaan as Vansh using some lines of waiting for Ridhima, the way he moved his body and hands and being so aggressive is making to stand out as Vansh. It says he is ready to kill Kabir right now and shower Ridhima with his lightening anger. Yet, he is maintaining his cool dudeness with the exercise. He wants to see what Ridhima can do.
At the same time he praised her too - ridhima deadly combination of looks and brain. Somewhere he knows his wife can get herself out of this situation and will try to make a path for him in the house again.
Kabir knows Ridhima too well that he is doubting about her strength. What he doesn't know is, Ridhima strength comes from Vansh. Whether he is near or far, the power passes between both.
Now Vihaan is back, to safeguard him, Ridhima is taking every step very cautiously. Ridhima feels until now it's Kabir game and right now they both are playing. What she doesn't know is - she is part of the game for the sure but never given the status of a Queen. She is a pawn for someone and a weapon for the other. She needs to rise as Queen to change the game.
The game is certainly on now. But between Kabir and Vansh as Vihaan. The man who unmasked his identity and the man who masked his identity.
P:S - From where you got the money Ridhima darling? Kya Beja hai? Did Vansh give you some card anytime - that we don't know yet?