Saranya-Horton, Benasque Open 2009, round seven, position after White's 20.Qb3-e3.
Black chose to attack the king and went 20...Ng5. After 21.h4 he continued 21...Nh3+ and following 22.Kg2 Rde8 assumed he was all right as 23.g4 is met with 23...Qxh4 24.Rh1 Qg5 and the knight escapes to f4.
Alas, White played 23.Rh1 instead - and shortly took possession of both the h3 knight and the point.
But in the above sequence, what did both players miss?
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