John Nunn was an early knight!
Still plodding through the level 40s, but it is going OK with my new approach. I'm taking my time and trying to think deeply about the problems - I even get a surprising amount right!
On a more interesting note however, I came across this bit in Jacob Aagaard Excelling at Chess:
It is a game John Nunn played against Portisch in the Reykjavik World Cup 1988.
Black played 31 .. c5? and Nunn followed up with a nice tactical finish:
32 Re4 Rg8 33 Qxh7+! 1-0
"Nunn had obviously intended this combination. It is no coincidence that in his Best Games Collection he writes that, as a child, he had solved every combination (999 in all!) in a book and this very same theme had featured."
Sounds like knight training to me, and even a grandmaster level game can be decided as a result!