Boom! Black sacrifices another exchange. In return, Black gets the important e4-pawn, ruins the pawn structure on the queenside and the light-squared bishop can join the party now via f5.

The white rooks cannot find open files and therefore their value is just anecdotal.

The threat is ...Nd2 with a fork and targeting the c4-pawn. Once c4 falls, so will d5 and the black pawns will start advancing!

The exchange sacrifice is a classical strategic element in the Sicilian Defense, and even more so in the Dragon Variation.

In this case, the hanging pawn on e4 completely justifies the sacrifice.

This is the best engine option. 3...Nxb3 was the game move.

Black has tremendous play for the exchange. ...d5 can neutralize the bishop on b3 for good.