Queen against rook

WIN
8
7
6
5
4
3
2
a1
b
c
d
e
f
g
h
THE METHOD
Materially winning and genuinely hard. Drive the defending king to the edge and use zugzwang to separate it from the rook — the rook alone cannot both shield the king and stay protected.
TargetWIN
Budget40 moves
Over budget is not yet, not a loss. The position replays and nothing is recorded against you.
TChess — get good at tactics