This is a diagram of the fields a knight can fork with a king when the king is on d5. And now anyone wonders why there are so many studies with a knight fork?
Since a knight can be placed on a maximum of 2 fields at the same time (by putting it into a knight distance), we get a realistic diagram like this:
(= 2+14 )
What makes matters worse: A knight can be everywhere at the same time in some situations. So multiply this for a single knight: (= 6+22 )
And here's the practical use of this: (= 4+3 )
Hermanis Matisonis
Latvis 1923
White wins
The white knight is on the abovementioned fields all at the same time, so 1.Sf4+(xb4) Ke5 2.Ba6 etc wins. Or in normal notation: