Since you asked it like this, I'd say 23...Rxd4 24.Nfxd4 Rxd4 25.Nxd4 Qc1+ 26.Kh2 Qf4+ 27.g3 Qxe4 
EDIT: Silly me, it's protected with the queen. :)
In this position what move would you make?
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Ah yes, maybe. 26...Qxa3 27.Qxb5 Qd6 (this is out of my memory, correct me if I got some squares wrong).
It's not a crazy move. In fact the engine ( to my surprise ) says that it is an OK move. Just white has a response which though still OK for black by the engine, not easily calculated by a human. I feared this response, so in human terms I was risking.
Look carefully at the position. What tactic is there that you can't make, and what white response to some black move would finally allow this tactic to be played. Once this tactic can be played I thought, it is a psychological blow. And my opponent made exactly the response I was hoping for.
Dec 5, 2014
0
#5
Was considering Nc3 with the idea of connecting Knights and pushing the b pawn a square further but...
Maybe Qd-- Wait, Qe7 looks better as it doesn't block the rooks and after Ra1 Qb4 seems good for black
After white made the move 23. Qe2 the back rank became undefended. If were not for the damned knight on b3, I could win the rook on a3 by 23. ... Qc1+. So I started thinking, could I remove the knight. Taking on d4 with the rook does not work, because of this other damned knight on f3. White apparently has built his strategy on overprotecting the d4 pawn. How can I remove the other knight? Only way is to try to risk taking on e5 with the rook and hope that white will recapture with the knight. If he recaptures with the pawn, I had no idea what to do. I thought it would be bad for me, so this is a risk. But somehow I felt: he will take with the knight, because he wants to be agressive. And so he did. I took on d4 with the rook, which apparently came as shock to my opponent. The engine does not like this move, but it made its psychological effect. He fell into a deep think and started making mistakes.
Don't look at this position with the engine. This came up in a live game, and there is a tricky and risky move here. It was no easy decision to make this move. I wonder what move you would make here and what is your thinking process ( remember that you are playing a human ). I don't care what the engine says. Here I made a move that I thought was double edged, which proved to be the winning move. I wonder if you can guess this move.
Black to move: