Have you ever played a '!!' move?

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"Here I take the free bishop. If Black recaptures, I can use the Bishop to fork the King and Rook, and I will be up four pieces".

I won't give 16. Rxe6 a double exclamation (or even a single exclamation) as Black can still extricate out of this with 16...Rxe6 17. Bxf5+ Rg6. White remains a piece down, but he has more pawns and the Black king is not really safe either, so White should have good compensation for it. In the end, White should be OK, but the move should not be sufficient to be awarded an exclamation, but I felt that !? might be better for 16. Rxe6.

I changed the username to protect my opponent's privacy. 

I feel like the analysis nowadays generously gives double exclams

! is a great move, and !! Is a brilliant move

The engine gave it a !!, not me, but fair point

Yes, I had dozens of !! moves.

You can see some of them in the thread 'brilliancies competition'

Just search the forums for the word 'brilliancies' and you will find them.

There are some very rare middlegame bishop-knight combinations as well as checkmating attacks and positional brilliancies.

Does change the beginner's perspective of chess as a human game to one that's actually controlled by an alien level of intelligence hitherto unknown by us (Carlsen being the exception).

My most recent brilliancy was a check forking the king and rook, so their pawn had to capture (I think they had a queen, but that would have ended poorly, since my pawn was defending the knight), exposing their king to my rook along the now-open file.

I played 2 before they reclassified them. The first was an excellent move by my standards, but the second was just me taking a hanging piece. Both swung the game in my favor and allowed me to win though.

The best one I can think of is 

The analysis gave the !! for 15. Bxb5+, but I think the real brilliancy is noticing that when I play 14. Qa4+, I'm completely fine with the b5 response and having no less than three pieces under threat at the same time. I knew before playing it I would have to give up the bishop. Yes I did miss two different mates later, but still had the checkmate on move 24.

In what game? because that seems highly unlikely.

Yes I've played 13. I add the game to a collection in my library every time I get one!!

There's 0 '!!' move in that game (7 '!' though so still great). Did you link the wrong one?

You miscounted, I achieved 10 blue '!' moves in one game

oh! you must have been thinking of the great move, not the brilliant move.

N - F3+

Since then (JUL 2022) I've had one other.

what how is that brilliant thats such a common tactic

I honestly have no idea if it was common. I just started playing chess for over a month. You are probably right but I did calculate this for a long time to make sure it could work so it was not a pattern I already knew.