Can you deliver one of these endgame check-mates?

are you calling 4 basic?

The 5 basic checkmates are:

1. KQ vs. K
2. KR vs. K
3. KBB vs. K
4. KBN vs. K
5. KNN vs. KP

Every chess player should know these.
Capablanca treats these in his beginner book A Primer of Chess.

Tell me one single time where knowing KNN vs. KP mate won you the game

@25

KNN vs. KP is rare, but happens occasionally in tournament play

https://www.chessgames.com/perl/chessgame?gid=1151993

I have saved many games by turning a lost position into KBN vs. K, with the opponent failing to checkmate.

That's different than KNN v KP isn't it

SF (any version except possibly beyond 15.1 - latest version I have) Intel(R) Pentium(R) CPU J3710 @ 1.60GHz 1.60 GHz 3GB hash.

Any White to mate in more than 45 moves at 40/120 repeating, also usually Black to mate.

Fewer if you have NNUE switched on - it appears to be a liability in this endgame (KBNvK also).

(Assumes no tablebase of course.)

E.g., a particularly incompetent attempt by SF15 at a mate in 36:

KNN vs. KP used to be rare.

Troitzky could find only 6 recorded instances of master games when he produced his analysis in the 1940s.

But that appears to have been because players didn't understand it, so avoided it.

These days it's more prevalent and you get things like this.

Interesting to note in that example that neither Gurevich (who went on to win the tournament) nor the author realised that Gurevich had offered a draw when he had a simple win, so my comment about understanding it could be unduly optimistic.

True of very many positions from endgame classifications that include a "P".