TataSteel coverage- Smeets vs. Shirov mating net?

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During this morning's Chess.com TV live coverage of the TataSteel tournament, I seem to remember one of the commentators find a very cute sacrifice that leads to mate from the position below:

I really wanted to take a closer look at the combination afterwards to see if it's sound, but for the life of me I can't find it or remember how it went. Can anyone remind me?