Black to move! Is this a draw or win for black? How should black proceed?
Wesley So was short on time- literally seconds left on his clock, but in the above position, he had just played the bishop from b7 to c8 when the proper defense would have been to keep the bishop in a position to guard the g4 square from the white side of the board (f3 or e2) where it also guards the h5 square- the tempo lost allowed black to play h5 followed by Ng4 driving the white off of h2, and so the knight could never be capturew without allowing black to undouble the h-pawns.
The idea behind 1.Bf3 rather than 1.Bc8 is that the knight can't come to f2 and then g4 until the pawn is put on h5, but if black plays h5 first, then white just sacrifices teh bishop for the h5 pawn, then attacks the knight on f2 from g3 winning the h3 pawn.