Sometimes we begin by looking for a visual pattern, sometimes we begin by looking at forcing moves; for it is important to be able to move between those methods of developing a combination. Let's start this one by considering any checks Black can give and their consequences. Easy enough; there is only one: Rh6+, which forces Black to play Kg1. And then what checks would Black have? Again, just one: Rh1+, which forces KxR—a classic (and now familiar) decoy of the king into the corner using successive rook checks. The pawn on g2 now is pinned, thus leaving h3 available for occupation. Black can occupy it with his queen, of course. To White’s Qh3 Black can only reply Kg1; now Qxg2# mates, with support for the queen furnished as usual by the bishop that imposed the pin.

An important point of the position: when you consider what offensive resources you have available to bring down on the king, be careful not to dismiss too quickly any of your pieces that seem far away or have their paths blocked. Often the paths can become unblocked and those pieces can swoop in quite rapidly. Here the queen looks at first like it is in no position to contribute to an attack, and yet it ends up delivering mate.