Vocabulary: Igyoku=Gyoku (King) that sits in the original position, wa=as for, sakeyo (imperative)=to avoid
It is extremely dangerous to start fighting with the King sitting on the original square.
In Diagram 1, Black has already advanced a Silver onto 4f with his King in the original position. If he wants to launch an attack from here, how would he play?
White in hand: nothing 9 8 7 6 5 4 3 2 1 +---------------------------+ |wL wN * * * wK * wN wL |a | * wR * * * wB wG * * |b |wP * wP wP wS wG wS wP wP |c | * wP * * wP wP wP * * |d | * * * * * * * bP * |e | * * bP bP bP bS bP * * |f |bP bP bS * * bP * * bP |g | * * bG * bG * * bR * |h |bL bN bB * bK * * bN bL |i +---------------------------+ Black in hand: nothing Diagram 1. Up to ...B4b Moves from Diagram 1: P-3e Px3e Sx3e P*3d P-2d Px2d Sx2d Sx2d Bx2d Bx2d Rx2d --->Diagram 2 White in hand: B S P 9 8 7 6 5 4 3 2 1 +---------------------------+ |wL wN * * * wK * wN wL |a | * wR * * * * wG * * |b |wP * wP wP wS wG * * wP |c | * wP * * wP wP wP bR * |d | * * * * * * * * * |e | * * bP bP bP * * * * |f |bP bP bS * * bP * * bP |g | * * bG * bG * * * * |h |bL bN * * bK * * bN bL |i +---------------------------+ Black in hand: B S P2 Diagram 2. Up to Rx2d.So far, Black's climbing Silver appears to have made a point. But White has a devastating move to play here.
B*1e
You cannot be too careful when you have a sitting King. Black had to play K6i first in this case. Then the attack would have been successful.