Breaking through in a knight ending

The 5th tournament in the FIDE Grand Prix series is under way and Karsten Müller has already discovered and annotated a few interesting endings. There is, for example the knight ending Ernesto Inarkiev vs Vassily Ivanchuk from the second round. In it a spectacular breakthrough led to success – no, sorry, should have led to success… 

Introductory video to knight endings from CBM 131
Analysis of the endgame Inarkiev – Ivanchuk