1 move puzzle and analysis of the variations

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Avatar of Armalando06
 
 
Hi everybody! This is a move I played in a game a few months ago. I'll post a few puzzles with various variations, this first one is just the main move. Difficulty: 1900.

Here's the mainline.
 
This is how the game actually finished (I then checkmated my opponent)
 
This is another possible line, which is a little bit worse than the main one.
 
Here's an alternative move to the main one, which is by the way winning only because of the same idea.
 
Hope you all will enjoy this study!
 
 
Avatar of Arisktotle

Well played!

Avatar of Armalando06

Little update, I just found out this move somehow crashes chess.com analysis: not only chess.com analysis says the position is -3.6, while local analysis (which I think is more reliable because it can reach potentially unlimited depth) says the position is -5, but it also says Rg3 is better, when it's between half a point and one point worse. And, lastly, the line chess.com suggest is evaluated -6... Once I'll reach depth 45 with the analysis I'll send a picture. Can anybody help me to solve this?