[Title "Drawing plan in a difficult position"] [fen "5nk1/4R3/8/6K1/8/8/8/8 w - - 0 1"] 1.Kf6 Nh7+! 2.Kg6 Nf8+ 3.Kh6 Kh8 4.Rf7 Kg8 5.Rg7+ Kh8 6.Rg1 Nd7! ( 6...Nh7?? 7.Kg6! Kg8 8.Rg2 Nf8+ 9.Kf6+ Kh8 10.Kf7+-Kf7 Nh7 11.Rg8#) ( 6...Ne6 7.Kg6! Nf8 ( 7...Kg8 8.Kf6+! ) 8.Kf7 Nh7 9.Rg8# ) 7.Kg6 Kg8 8.Rd1 Nf8+ 9.Kf6 Nh7+ 10.Kg6 Nf8+ 1/2-1/2
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The weaker side needs to keep Knight close to his King in order to achieve draw.
There are some special cases where the stronger side wins even in those situations, like when Knight is cornered or pinned in such a way that puts weaker side in zugzwang.
If the Knight is far away from the King then the result of the game depends whether or not the defending side is able to connect his pieces.
Here are some demonstrations:
It is useful to mention that in these position the defender should not allow vertical opposition(
Even in the following position, Black is able to maintain a draw:
Winning motifs for the stronger side:
We already saw one above-the decisive pinning of the knight that leads to zugzwang:
These motifs happen due to bad positioning of the King:
or badly posted Knight:
Another important motif is cornering the Knight :
Sometimes defenders units are not badly placed but just separated. In that case stronger side can win if it can push Knight away from the king since then it will be able to trap it. Here is an example:
The defender must keep his pieces together and avoid being cornered. Maintaining diagonal opposition with kings is desired.
The stronger side has several winning motifs:
Examples and instructions are taken from the book:
Y.Averbakh - Comprehensive Chess Endings Volume 2.