After 21.Qxb7??: Black to play and win!
In the Adams-Torre game, we've seen White sacrifice his queen on three consecutive moves. So wouldn't it be cool to sac a fourth time? Again, if Black were to accept the sacrifice with 21...Qxb7??, then 22.Rxe8+! would lead to a back rank mate.
The problem is that Black can reply with an even cooler counter-sacrifice: 21...Qxe2! (It's an easy move to miss: one of the commenters fell into a different version of the same trap.)
After 21...Qxe2! White to play
Black has a forced win here, but White can try to set a trap.
If White now plays 22.Qxc8, what's is Black's winning reply?
Or if White instead plays 22.Rxe2 Rc1+ 23.Ne1 (see diagram below), how does Black force the win?
After 21.Qxb7?? Qxe2! 22.Rxe2 Rc1+ 23.Ne1:
find the win for Black