Apparently the composer set himself the task to use only a K + R on the white side or it was part of an assignment. Otherwise he didn't need to fill the first lines up with black stuffings.
Problemas y Finales (X 17) por W.SPECKMANN-Die Schwalbe, 1954-Juegan las blancas
Sort:
jijii!! yes!! ....Re Facil, no? jijiii!!!! yes!!
Juegan las blancas y jackmete en 5
BLS: Kb8 - Ra3 (2 pieces)
NGS: Ka1- Rb1- Qc1- Rd1- Be1- Rf1- Rg1- Bh1- Na2-
b2- c2- d2- f2- g2- c4- (15 pieces)