: ( 222aa)
White peeps at the upper edge.

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Black takes the opportunity to play the guzumi.

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White completes the Guzumi Exchange immediately.

Cutting at at the upper edge, in exchange for Black's independent life at the right after , will not benefit White.

:
Black connects at the upper edge.

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White has to save her five stones in the upper left now.

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The top right is already played out, so Black gives atari at White's five stones.

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White has to connect.

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Black gives atari at White's two stones in the lower left.

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White continues with occupying Black's liberties at the right.

The large endgame spots on the left side are still open, so White cannot afford losing tempi in the Main Semeai by connecting her stones.

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Black reinforces his upper left corner, threatening to play at next.

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White's push destroys two points of Black's territory without losing a tempo in the Main Semeai.

:
We have reached a change in the order of moves with a later subvariation, where White captured Black's single stone in the upper left before playing the peep at the upper edge ( 222nw).
For further details, please see there.

White will continue with the wedge in the left centre, which will benefit her by one point overall.

The final scores of the game will become White + 3 / Black + 1.