Brilliant Moves in New Game Analysis Report

I was playing against a 1400 bot for fun and this happened:

FEN: 8/8/5p2/5Pp1/8/4K3/8/6kB b - - 0 56

For those not using Beta, this is the method brilliant moves are assigned from what I've seen.

My copy-paste message for people asking about brilliant moves in the chess.com discord:

Here's the explanation behind 99.999% of brilliant moves.

From what I've seen, brilliant moves need to fulfill 3 criteria (at least)

1. The engine only sees the move's continuation after a decently high depth, this doesn't mean the engine can't find it, it means the engine doesn't find it on low depth.

2. The move needs to be the only move in the position that draws or wins.

3. The move needs to have more single continuations after black makes their move. Black can have multiple good continuations, but if after at least one of them white again needs to make an 'only move', it'll at least have a high possibility of it being classified as a brilliant move. You'll find it being classified as 'only moves' in your annotated pgns after a game report, it'll say {critical move}

Because of rule 1 and 3, some moves that we'd call "brilliant moves" aren't brilliant on chess.com. It actually needs to see the continuation to be called brilliant on chess.com. If it's so brilliant that the engine doesn't spot it, it won't count. For those using the old Game report, if you've played a move the engine doesn't find but it doesn't say it's brilliant, analyze on a higher depth than 18, it'll say it's brilliant if it correctly evaluates the position at depth 18.

The same thing applies for rule 3, a great "only move" positional idea doesn't always warrant single continuations afterwards, but it could lead further down the line to a better position.

Also, on a side note, since I've seen a lot of people talk about this,

Previous moves made don't matter, it doesn't look at any history, just at the current position and the move made. It may or may not check the local history of assigning brilliant moves (so it doesn't give 3 brilliant moves for a dumb repitition), but I haven't found enough evidence for that yet.

For those using beta and the new brilliant move algorithm, here's how the new ones are assigned from what I've seen.

1. Sacrifice anything, just anything. The more value, the better. It needs to be the best move (or close enough) in the position, it doesn't matter that much what the follow-up is, just sacrifice. It doesn't need to be an 'only move', it doesn't have to have single continuations. It just needs to be semi-decent.

2. It still does count moves which it can't find on low depth, but they dialled up brilliant moves on sacrifices by 10. 'You made a cool pawnbreak?' Yeah that doesn't sacrifice anything.

'You gave up your bishop for a pawn so it doesn't become a queen next move?' ABSOLUTELY BRILLIANT.

3. It almost definitively doesn't check history. Like at all, repetitions give the same brilliant moves over and over again.

Overall, this new beta algorithm is somehow more garbage than the previous one. It's WAY too generous, gives brilliant moves on every bishop opening sacrifice on f7, most sacrifices in endgames, you get the point. Very little importance is placed on actual good brilliancies, positional ideas (which are hard to code for, I know) and actual forced-ish combination. Some random nonsense sacrifice shouldn't give brilliant moves, while an insane silent move should.

Rant over

engines aren't perfect

yes I did

Brilliant moves mean it is the best but Stockfish did not see it

No they're not. That's the simple explanation so the average chess.com user understand why some moves are brilliant and some are not.

And the post you're referencing is about the new beta brilliant algorithm, which is a lot different than the original one.

look all my games there are 3 brilliants in it

I have a question to Hikarunaku and jalaal, which is better, a alternative move or a best move

never get a brilliant and I sacrifice stuff all the time...

I have briliant move

i have more than 15

actually those moves are not brilliant usually by machines. it has to be computer kind of move to be brilliant. machine-like.

NOOOOO! I lost my brilliant move and it converted into a great move!

Mine got turned into best move

Guys Jalaal and Hikarunaku literally explained the same thing Jalaal explained it more in detail and all of you guys are idiots for not noticing that.

Brilliant is just a move the computer didn't find after reaching a certain depth that the player did find.

No.

I mean you can literally test that, since you can see brilliant moves now that a computer CLEARLY finds, even at very low depth, but are still brilliant.

The new brilliant algorithm is totally different than the previous one... And even the previous one was more complex than "The computer couldn't find it".

If you're still convinced it's "The computer couldn't find it till a certain depth" (although it does play a role), search "Dunning-Kruger effect"

It is completely different them now, I am getting great moves once or twice every game (I am 1200-1450 rated) and brilliant moves MUCH more often than last year now.