When I was watching the Yoo game I wondered if he'd played 23.c4 with the idea of 26.Nxb7 Kxb7 27. Rxd6, missing of course that 26...Nxb7 is available. That has all the qualities of an explicable blunder: it's hard to see that a black knight could end up on b7 from the initial position, and backwards piece moves are notoriously an area for blindspots. Of course, Yoo is going to see that 99 times out of 100, but it's in the realm of the explicable, though missing 25...Nb6 as well perhaps undercuts that.
When I was watching the Yoo game I wondered if he'd played 23.c4 with the idea of 26.Nxb7 Kxb7 27. Rxd6, missing of course that 26...Nxb7 is available. That has all the qualities of an explicable blunder: it's hard to see that a black knight could end up on b7 from the initial position, and backwards piece moves are notoriously an area for blindspots. Of course, Yoo is going to see that 99 times out of 100, but it's in the realm of the explicable, though missing 25...Nb6 as well perhaps undercuts that.