Queens off, then both breaks
Without queens White’s space matters less and Black’s two pawn levers matter more. Tiviakov played ...f5 and then ...b5, and both pawns of the bind left the board.
Why the queen exchange suits the side with less space
The Maroczy Bind is the pawn pair on c4 and e4. It takes d5 away from Black’s pieces and makes the freeing advance of the d-pawn hard to arrange, so Black cannot simply develop and wait. Black has less room, and the side with less room is helped by exchanges: every piece that leaves the board is one piece fewer that has to find a square behind the d6 pawn.
Black’s set-up in this chapter starts with an early exchange of knights on d4. The bishop then goes to e6, where it attacks c4, the queen goes to a5, where it pins the knight on c3, and the king’s rook comes to c8. None of this breaks the bind. It ties White’s pieces to the c4 pawn, and it often provokes the offer of a queen exchange.
Without queens the bind loses much of its force. White’s extra space no longer supports an attack on the king, and both kings can stay in the centre. What remains is a question about pawns. Black has two levers, one against e4 and one against c4. Each needs preparation, because a lever played before its supporting pieces are in place gives up material or a square.
When both levers have been exchanged, White’s c- and e-pawns are gone and Black’s d6 pawn has no enemy pawn in front of it or beside it. The position is not better for Black by itself. It is easier to play, and in this game White was the first to go wrong.
No note on this move.