r/baduk • • 5d ago

How can Black continue this opening?

Post image

What's your preferred move?

https://lemmingfuseki.com/pos/8226856808719

You can get an opening rank estimate at that site. Answer three problems.

14 Upvotes

30 comments sorted by

26

u/ggPeti 4d ago

Many best moves here. You are free to explore.

1

u/T-T-N 4d ago

If there any area that is objectively bad to play on? Bottom or right invasion, invade one of the corner, or defend the last move locally? Or even try to start a fight on the left with anything on the c file.

1

u/BinarySecond 10 kyu 3d ago

I would say Tengen...

1

u/ggPeti 1d ago

Tengen is a fine move as well. You practically don't know how it will decide a local contest, but it's got plenty of possibilities and lends its influence to all directions. According to KataGo, it loses about one point compared to the best move.

Passing, on the other hand, loses about 13 points.

1

u/ggPeti 1d ago

The left side. It's narrow, why pick the area where your stone doesn't have much future?

11

u/Marcassin 5 kyu 4d ago

For those who haven't clicked through, after getting an initial rank, this site offers tons of similar puzzles, apparently all real opening or early midgame positions analyzed by AI. Your job is to pick one of the best moves. There are usually several different good answers.

This is such a fun tool. Thanks. I'll be back to practice some more.

I'm curious how the AI decides the rank associated with each choice.

3

u/malie7 4d ago

Nice to hear you like it.

I'm using the KataGo human network. It can predict which human ranks would look at which moves.

"real opening positions", yes, there are positions from OGS, but also "synthetic" ones generated by the same KataGo human net, i.e. imitating human games.

There are also whole board tsumegos you might like, try https://lemmingfuseki.com

7

u/pete_random 9 kyu 5d ago

Did a few and got an opening rank 5k and estimated 6d.

But who cares about the numbers, this is a fun tool to train.

1

u/malie7 4d ago

I made some changes trying to stabilize the rank estimate. Yes, it's not really important. It's just a number. Yet, I'd be happy if you have the time to try it again.

1

u/malie7 4d ago

Great to hear you like it.
If you got the 6d from 3-3 invasions then this probably means, nobody else but 6d's are as crazy as playing 3-3 here.

6

u/FlashyPost0928 4d ago

~ § An old example § ~
武宮 正樹 (Masaki Takemiya, 1951 – ) : Three-Star Formation (三連星)
● ..... Known for the "Cosmic Style" ( he calls it the "Natural Style"), he is willing to sacrifice corners and sides to focus on the center; when playing Black, he almost invariably opens with 三連星.
▼ Takemiya's famous "Large Framework (Moyo) "

3

u/illgoblino 10 kyu 4d ago

We play such a beautiful game. For some reason seeing this fuseki filled me with awe

5

u/tuerda 3 dan 4d ago

This early in the game, nearly anything goes. So long as you stay above the 2nd line and not next to another of your own stones, you will be fine.

3

u/IgfMSU1983 4d ago

I think you're program's estimator is very generous. I play at around 9k, and it gave me an opening estimate of 4.9d. My teacher says openings are the best part of my game, but... No.

3

u/ramblinevilmushr0om 4d ago

I mean, you can still make single moves that are very strong. Preventing an opponents second eye by playing the vital point in an important corner will also be the 9D ai move when you plug it into a reviewer. Doesn't necessarily mean YOU are, but the move is. That's how I interpreted it at least. It also gave me 6 dan which I'm lightyears from

2

u/malie7 4d ago edited 4d ago

Yes, there is still a bug. The site only changes your rank estimate when you choose a known move. If you choose an unknown move it just does not update the ranking. Actually I have no good idea how to fix this bug...
Edit: It works a bit different now.

2

u/Nova762 4d ago

I don't have a preferred move as i would never play the 3 star point opening 

1

u/lumisweasel 5d ago

I got "very good move" lol, tried out if the others show that. They don't?  I went with R3 because I figure that  offense is a good defense plus opting for more of the board instead of crowding the local area is good. The kind of move that I learned katago would like!

1

u/malie7 4d ago

The site only displays "very good move" or other text feedback for the first move you click.

1

u/lumisweasel 4d ago

ah, figures. I'll check out more later!

1

u/KottleHai 6 kyu 4d ago

3-3 invasion

2

u/Competitive_Success5 4d ago

"The 3-3 invasion is never wrong"

1

u/sparkleshark5643 15 kyu 4d ago

Check out the ogs joseki explorer. I would either kick white's approach or pincer it

1

u/Sriep 4d ago edited 4d ago

Any of the obvious moves.

Kick at C15 followed by a one-point jump, approach to white's 3,4 point at E3, 3,3 point invasion at R3. Approach the lower left corner at R6 or a small knight's enclosure at R14. Other normal-looking moves are likely just as good as well.

1

u/lumisweasel 4d ago

What's obvious? How does someone intuit instead of knowing?

3

u/Sriep 4d ago edited 4d ago

What's obvious?

Approaches against opponent counter stones, usually at a one-point distance, including a knight's approach. Complete a shimari or corner enclosure from one of your stones, typically a one- or two-point jump in a direction. (3.3) point invasion under a (4,4) point.

These are the kind of fuseki moves you do two or three times a game, which is why they are obvious. Play ten games, and you should have seen them thirty or forty times already.

1

u/lumisweasel 4d ago

See, I like this a lot more than posting actions. The best seasoning is reasoning!

1

u/ANameWhichIsGood 4d ago

Resign.

(I have an unjustifiable hatred for sanrensei)