: ( 648ng)
Black plays hane at the left edge.

:
White gives atari from above.

She could also simplify the issue by descending to , instead. Black would be forced to play at , achieving a gote seki in the corner.

:
Black gives atari at White's corner group.

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White starts a ko fight that Black cannot win.

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Black has an internal ko threat here.

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White's move threatens to kill Black's entire group at the left side.

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Again, Black lacks adequate ko threats.

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White simply ends the ko fight by capturing Black's lower group in the corner.
Please note the White does not need to capture the hanezeki's tail any longer, gaining about 25 points from not dissolving the hanezeki alone.

:
At least, Black lives small at the right. But he has lost the game large already.

White wins the game by a very large margin