RE: Chess problem 52, and the "null-move heuristic". / Schachaufgabe 52 und die "Null-Zug-Suche".

[pearlumie]

Wonderful @jaki01, my friend. I didn't understand until I saw the picture. Let me confirm if am right. The nook white beside the king can move up a step, if the black king tries to kill it, the white king will kill the black king. The white nook can move again, if the black king tries to kill it again, the white nook in front of the black king will take the king out . I think am correct, correct me if am not...