How many moves...

Originally posted by ark13
Yeah, but you started with white playing e3. It's white that's the one who has to only move knights, right? 😕 I'm sure I'm confused.

Yes if White checkmates the move are different, but he needs 4 moves (including a waiting move). So I posted the solution from Black's view (Black checkmates White, using only his knights) because it's just 3 moves then.