Closed Sicilian Puzzle/Annotated Game

This is from my game. I played it on the Internet Chess Club against a 2088 player. I am Black. Find the winning move.

When I play blitz (5 minute or faster) on the internet, I try to take my openings very seriously. I then review my openings in "Chess Base" pretty thoroughly. If I learn one thing from every blitz game I play, I will learn thousands of new things a year.

For the whole game with annotations,

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