Stockfish 17 simply DOESN'T Understand Fortresses! - Leela C Zero's Immortal 120 Move Fortress!!!

[@naoufal5490]

I still haven't seen the games, but Game 19, stockfish also made a pile fortress that leela didn't quite understand.

[@Jozarovschesschannel]

I will check it out thanks

[@blijebij]

I would love to see Leela play this with the white pieces! That would be awsome! I love Ai chess as its genious level, so dynamic&elegant. Thanks Josip, fantastic explaining all moves of both sides! :)

[@Ratva666]

That is MY GIRL. LeelaCzero.😍😍😍😍😍😍🥰🥰🥰😇😇😇😇

[@Ratva666]

It is the same position from the day before yesterday that she played. Exactly the same. Immortal Defense.

[@eliasseoane7663]

it's different

[@michaelmassaro4375]

There was a game couple days ago with the fortress forcing a draw I’ll have to wait to see endgame

[@michaelmassaro4375]

Right crazy endgame that’s nuts slightly different but just as effective

[@michaelmassaro4375]

Fantastic play from Leela after the Queen exchange Strong fortress Stockfish was bugging to find an opening where there wasn’t any . Stockfish does better when it gains advantage early Great game thanks Jozarov

[@FevziKonuk]

I saw this live..such a beautiful game

[@joseraulcapablanca8564]

A great strategy with an evolving fortress. I would usually call a queen for rook knight and two pawns a dynamic imbalance and not a sacrifice. But this was done to create a completely static position. Thanks Josip.

[@michaelmassaro4375]

Rook Bishop 2 pawns = 10 pts Queen = 10 pts Leela gained a bishop rook and two pawns not a knight etc but ok ✅ 😊

[@joseraulcapablanca8564]

@ yeah you are right but the principle is the same. I would be a dynamic imbalance or dynamic balance depending on viewpoint, but Leela took all dynamics out of the position.

[@XEJTEP]

​@@michaelmassaro4375 Queen worth is 9 points .

[@andream171]

Really spectacular! It would be a blast if you create a playlist that contains every fortress game that you covered so we can study from it! 💪😊

[@Jozarovschesschannel]

I really thought about it. Probably will make a special video

[@EnriqueBecerra-x7s]

Brutal tablas, gracias jozarov, saludos

[@davidschneide5422]

From Fischer’s “sac, sac, mate” to Leela’s “sac, sac, sac, stalemate”

[@thwaib100]

Amazing by leela , amazing by jozarov

[@veritasdivina]

Learning to build a fortress as part of your strategy or recognize it when defending is not something a relatively small net like Stockfish's NNUE net can do. And because Stockfish is pure CPU engine, increasing the network size comes at a cost of alpha/beta search speed. Stockfish 17.1 evaluates "only" 40 Mn/s, whereas pure classical engine with no NN can do it 10 times faster on tcec hardware. It remains to be seen if Stockfish also starts utilizing GPU in its evaluation (where available) in the future.

[@michaelmassaro4375]

That’s a lot of fancy jargon

[@veritasdivina]

@@michaelmassaro4375 Sorry, been a software engineer for 30 years now. It comes naturally. It's easy to forget how weird it sounds to regular people. I'm so used to talking to other software engineers.

[@oscarhernandez2779]

Whats “NN”?

[@oscarhernandez2779]

And whats “only 40Mn/s”?

[@oscarhernandez2779]

Since you bring it up, Ive been wondering myself about this. Have you heard of Alphazero 19, and if so, what are your thoughts on it and how it compared to Stockfish 17?

[@Mentoritori-h5u]

Amazing défense for lela

[@wombolino2343]

As a beginner, i wondered for most of this recap, why the black b6 pawn was invulnerable, despite white being seemingly able to attack it twice (with Queen+Bishop) while black could only sustain one defender (the knight)...

[@raylopez99]

What?? Another Furious Rook?!!

[@anonym5160]

The dumb fish

[@oscarhernandez2779]

If you cant beat it then that makes you even dumber than a fish! 🤣

[@alpal2002]

The Black Knight on c4 became too powerful . I think a human would have swapped it for a Rook and tried to get some pawns too for the trade.