A question with the rules of chess

[h1a8]

If one side has king with two Knights against a king with one knight then can the side with a single Knight claim a draw? Is that a rule of all chess or a rule of some tournaments or not a rule anywhere?

[Vinvin]

If one side has king with two Knights against a king with one knight then can the side with a single Knight claim a draw? Is that a rule of all chess or a rule of some tournaments or not a rule anywhere?

I have never seen that rule.

The longest mate with KNNKN is 7 moves (there are 38 positions with mates in 7) :

[d]7n/8/8/3N4/1N1K4/8/8/k7 w - - 0 1

[Terry McCracken]

Much like having a pawn on the board, the losing side can have it's king fixed without drawing and has to move their Night allowing checkmate.

[Look]

If one side has king with two Knights against a king with one knight then can the side with a single Knight claim a draw? Is that a rule of all chess or a rule of some tournaments or not a rule anywhere?

I have never seen that rule.

The longest mate with KNNKN is 7 moves (there are 38 positions with mates in 7) :

[d]7n/8/8/3N4/1N1K4/8/8/k7 w - - 0 1

It seems to me, the black knight prevents the game from being stalemate.

[gbtami]

If one side has king with two Knights against a king with one knight then can the side with a single Knight claim a draw? Is that a rule of all chess or a rule of some tournaments or not a rule anywhere?

There is no such a rule.
See http://www.fide.com/fide/handbook.html? ... ew=article

[sje]

[d]7n/8/8/3N4/1N1K4/8/8/k7 w - - 0 1[/d]
Mate in seven: 1. Kc3 Kb1 2. Nd3 Ka2 3. Kb4 Ka1 4. Kb3 Kb1 5. Nc3+ Ka1 6. Nb4 Nf7 7. Nc2#