(Keitou no Gyoku yose nikushi.)
Vocabulary: Kei (Keima)=Knight, no=of, Gyoku=King, yose=approach, nikushi=not easy
What is the move you should NOT play in Diagram 1?
White in hand: nothing 9 8 7 6 5 4 3 2 1 +---------------------------+ |wL wN bS * * * * * * |a | * * wS * * * * * * |b |wK wP wP wG * * * * * |c |wP * * wP * * * * * |d | * * bP * * * * * * |e |bP * bS * * * * * * |f | * bP * * * * * * * |g | * * * * * * * * * |h |bL * * * * * * * * |i +---------------------------+ Black in hand: G N P Diagram 1.If you play N*8e, the King will come to 8d. Then even if you go on to play S8b-, there will not be any more effective moves on your part. (Diagram A)
White in hand: nothing 9 8 7 6 5 4 3 2 1 +---------------------------+ |wL wN * * * * * * * |a | * bS wS * * * * * * |b | * wP wP wG * * * * * |c |wP wK * wP * * * * * |d | * bN bP * * * * * * |e |bP * bS * * * * * * |f | * bP * * * * * * * |g | * * * * * * * * * |h |bL * * * * * * * * |i +---------------------------+ Black in hand: G P Diagram A. Up to S-8b=.Suppose there is no Knight on 8e above. (Diagram B)
White in hand: nothing 9 8 7 6 5 4 3 2 1 +---------------------------+ |wL wN * * * * * * * |a | * bS wS * * * * * * |b | * wP wP wG * * * * * |c |wP wK * wP * * * * * |d | * * bP * * * * * * |e |bP * bS * * * * * * |f | * bP * * * * * * * |g | * * * * * * * * * |h |bL * * * * * * * * |i +---------------------------+ Black in hand: G P Diagram B.There is an easy mate: G*8e. Please note that the Knight dropped at the head of the King blocked an easy access further on. This is why you should be careful when dropping a Knight in check in the endgame.
The right move in Diagram 1 is P9e. Again, use an edge Pawn against the edge King.