I'm so confused- Is my queen sacrifice brilliant or not? - Chess Forums

Six_Pack_Of_Flabs

Apr 18, 2023

0

#1

I ran a analysis on this game:

As seen, the move 34.Qc8 was originally classified as a brilliancy, but after I got a diamond membership for some reason it is classified as a mistake because the move misses a forced checkmate. Yet after the top engine move, e5, the engine claims its mate in 6, which corresponds with the possible m7 it claimed I missed earlier. As seen in the variations, there is no way to prevent checkmate, so shouldn't 34.Qc8 be classified as a brilliancy, as it originally was? Is this a bug?

Martin_Stahl

Apr 18, 2023

0

#2

Six_Pack_Of_Flabs wrote:

I ran a analysis on this game:

As seen, the move 34.Qc8 was originally classified as a brilliancy, but after I got a diamond membership for some reason it is classified as a mistake because the move misses a forced checkmate. Yet after the top engine move, e5, the engine claims its mate in 6, which corresponds with the possible m7 it claimed I missed earlier. As seen in the variations, there is no way to prevent checkmate, so shouldn't 34.Qc8 be classified as a brilliancy, as it originally was? Is this a bug?

Brilliants are sacrifices that are best or good but they are also influenced by your rating. The diamond level likely ran the review at a higher depth, changing the evaluations done and also changed the classification in the process.

Six_Pack_Of_Flabs

Apr 19, 2023

0

#3

Martin_Stahl wrote:

Six_Pack_Of_Flabs wrote:

I ran a analysis on this game:

As seen, the move 34.Qc8 was originally classified as a brilliancy, but after I got a diamond membership for some reason it is classified as a mistake because the move misses a forced checkmate. Yet after the top engine move, e5, the engine claims its mate in 6, which corresponds with the possible m7 it claimed I missed earlier. As seen in the variations, there is no way to prevent checkmate, so shouldn't 34.Qc8 be classified as a brilliancy, as it originally was? Is this a bug?

Brilliants are sacrifices that are best or good but they are also influenced by your rating. The diamond level likely ran the review at a higher depth, changing the evaluations done and also changed the classification in the process.

That makes sense, but it's not what confuses me. Check out these screenshots of the GR:

The BEST move is Qc8, because of a forced M7, but after it is played,

It is classified as an inaccuracy, because of the move e5

Yet after the move e5 is played;

The position on the side is evaluated as +8, while the position on both the sidebar evaluation and the lines is classified as M6. After the top engine move;

The number that used to say +8 now catches up and says M5, two moves after the apparent M7 I missed by playing that queen move.

See how confusing this is?

Martin_Stahl

Apr 19, 2023

0

#4

A lot of that can be explained by how deep the engine gets. As it gets deeper, it can find better moves

Martin_Stahl

Apr 19, 2023

0

#5

In running a review on that position, it never changes for me. Regardless, it's M6 after Qc8 and stayed as Brilliant.

I'm in the beta, so that might make some difference. Also, I use maximum review

hmm, you're beta too so should be the same.