My opponent played this brilliant move and I need help to learn from it

Thank you in advance!

Minding the 100+ elo d/ce between you two. they were able to force you draw hence by you drawing with a lower elo you get they get an increase on their elo rating and yours get deducted. in short, they saw the opportunity of a forced draw.

@Yonanina, we were closer in rating when the tournament started. Besides, ranking in daily chess oscilates 100pts up and down regularly when around 1200 and means little. Chess.com rating is NOT ELO

The question was about the move, how could I know in a future game if sacrificing my queen for a rook is beneficial to my game? I'm trying to learn

I think you should have left your rook to support your king at the back rank to prevent his rook from forcing the draw

Look at the position after 30. Rf3.

If black brings the queen away, he loses the rook on f8. Instead of losing a rook, black decided to give up a queen and win a rook.

From a material point, it's about the same. And the position is roughly equal after both.

Yes it looks winning for black due to black's extra pawns.

Maybe drawn but I doubt white can hold it. 32. ...Rxf3 was an obvious blunder.

In what sense was it a blunder? Or even "obvious"?

It loses the bishop, magipi. Black's bishop is necessary to win the game. I think it ought to be winning but also the B holds black's important pawns.

It was incorrect of the AI to classify it as a brilliant move since any other move loses more material. It was really a forced move and also it gains the equivalent of 2 pawns. It wasn't a sacrifice. Total nonsense.

Thank you!! This was so clear to understand once you said it '^^

Thank you to everyone else, I tend to overlook pawns and was simply thinking that my rook would be safe because I have a very high threshold to sacrifice my queen.

Wasn't quite accurate though since after Q takes pawn black should be winning. There's almost no chance of winning after losing the rook.

There's a big difference between a sacrifice and a combination and this is part of a combination. A combination might consist of rook takes knight, pawn takes, then Bishop takes pawn forking king and rook, gaining material. The initial R x Knight isn't a sacrifice.

Also a brilliant move is an award which is intended to try to interest beginners in combinatory play. The criteria for awarding it change and become tougher as a player gets stronger. This was a forced move since anything else loses a rook. I think the game can still be won after Qxf3 but definitely not after losing the rook.

It can't be won by force ... it's a draw. But a game by two fairly weak players is more likely to be a win after Qxf3 than after any other move.

awesome

i think Qxf3 is a desperado

Nice move

Qxf3 loses 3 points. But any other move loses whole rook (5 points). So it’s quite obvious that Qxf3 is clearly the best move. I see nothing mysterious about it. There is no definition that !! Must be necessarily a winning move.