In Korea, 5 kyu can actually be quite strong, so even dan level players will find some useful knowledge here.
Transcript of the video
Translated by Oh Chimin 7d for GoGameGuru.com
Edited by David Ormerod 5d
Hello everyone, welcome back to 'Becoming 5 Kyu'. I'm Shim Wooseop 7d.
This is the last episode of Becoming 5 Kyu.
You've learned a lot from the series. What you need to do now is to use it in your games.
I hope that you'll become 5 kyu, or even stronger!
Let's start today's lesson.
We'll continue on from the last lesson.
Black builds a large moyo in this fuseki.
When white pincers, black can double approach and invade at 3-3.
And this jump is sometimes played to develop influence in the center.
When pressing here, you need to consider the potential ladder.
Since the ladder favors black, white has to push like this.
It's a large scale joseki, so the outline of the fuseki will be quickly be sketched out.
This knight's move is the key to building the moyo.
To reduce black's moyo, white has to split.
Black can't miss both good points, so he needs to defend here now.
After this move, white must jump here.
Black should exploit his influence entering the left side.
Black starts off with this approach.
White has to avoid being enclosed.
Then this knight's move is a proper extension.
Instead of this attachment, white should attach like this.
Last time, white settled down in the corner so easily.
However, this bump is a bit trickier.
Because of the slide, white needs to block here.
Then black ataris.
There are usually no ko threats in the fuseki.
But white can't play an empty triangle. The center will be blocked off.
So this atari is proper.
Since there are no threats, white can't win the ko.
In this case, just connect here.
Instead of saving his stone, black should atari.
When white captures this stone, black has some ko threats at the top.
This is a good threat.
The top side is too big to give up.
So white has to answer.
It's fine to play like this when white doesn't have any ko threats.
At this point, black needs to defend his weakness.
This tiger's mouth is the proper response.
After that, white also defends his cutting point.
If black tenukis, white will peep and erase black's moyo.
So black has to play to preserve it.
This is the best sequence for both sides.
Since white came out into the center, some would prefer white.
Does black have other moves?
This cutting point is tempting. Black has many threats at top.
At this point, you need to remember this.
Instead of capturing immediately, cut here first.
This move is a lot better.
If black connects, white can extend.
White gained many points, while black's influence has lots of flaws.
If black ataris, white will capture this stone.
It's a double atari, and black has to make a ko threat.
Here's a threat.
If white answers, the corner will be threatened.
Therefore, white has to finish the ko and make a trade.
If black ataris like this, white will counter-atari.
Black needs to atari here, then white will capture this stone too.
What do you think of the trade?
Black's territory is considerable.
However, white's ponnukis are more valuable.
So the result is better for white.
Black didn't get a satisfactory result in either variation.
Let me show you how black can gain profit simply in this situation.
Black has to seek compensation on the left side.
This is the key moment.
Black should make an exchange before connecting.
By peeping here, black manage things simply on the left side.
Peeping and capturing black's stone isn't a good idea.
Black's weakness was removed by white's peep.
As I said last time, this point is very painful for white.
Therefore, white has no choice but to connect here.
After that, connect here.
This jump is vital.
Then black approaches here.
Because black can connect, capturing this stone is conceivable.
But then black can enclose the outside with one move
Since the corner is vulnerable, white has to defend it.
But, after black approaches the lower left, this moyo looks excellent.
White should choose another move.
If your opponent can enclose you with one move, you need to avoid it.
So white has to kosumi.
What will happen if black rescues this stone?
In this case, white will play a knight's move.
If white jumps here, black's thickness will become useless.
Black could take the corner, but then white would block here.
If white defends like this, the left side is much better than black's corner.
Therefore, black shouldn't save his stone immediately.
Instead, this knight's move is still the proper response.
To get a safe position, white captures this stone.
After that, black approaches to develop the left side.
Despite some weaknesses, black successfully created a moyo on the left.
Without this move, the corner isn't complete.
This is a common fuseki pattern.
Consequently, black can make use of his thickness, attacking this stone.
There's another joseki you should learn about.
Recently, it's been played very often.
Therefore, you should be able to remember it easily.
White can slide into the corner and this is joseki.
But, due to the placement of black's stones, this choice isn't good.
Now it's hard to move this stone out.
Since black's strong now, white has to compromise.
This is a safer and better move in this situation.
Black can secure the corner in sente.
Because this stone isn't placed on the fourth line, black doesn't need to defend anymore.
He can take another big point.
There's one more thing I want to tell you.
Please be careful when black attaches here.
Many players would just extend here with any thought.
However, that's a big mistake.
Black has an aim.
This is the vital point.
This move will lead to disaster.
If black cuts here, white will be separated.
It's too late to exchange this. Black will just push and cut.
Inevitably, white has to answer like this.
But black can connect under in sente.
In addition, it's a bad exchange.
This group still isn't alive.
Black can get many points from attacking, while white struggles.
It's a big loss.
In response to the attachment, white has to extend this way.
Don't forget this move.
Black has applied pressure to white and arranged his moyo.
If you remember and review this sequence, your sense of the fuseki will be greatly enhanced!
Let's move on to life and death problems.
We'll look at practical life and death problems.
Here's black's weakness.
Even though white cuts off black's stone, the corner isn't secure.
Let's examine variations in the corner.
Later on, black could invaded at 3-3.
It's important to reveal this move at the right time,
Making two eyes isn't everything.
If you find something bigger, you need to play there first.
Let's try to capture the whole group like this.
Can white kill the group?
This placement is easily spotted.
Black has no choice but to connect here.
Then white will also connect.
There's no need to complicate the situation. Exchange this first.
And this move is sente too.
This kind of shape often appears in actual games.
If white captures this stone, black plays a tiger's mouth.
These two points are miai, so black's alive.
What if white plays here first?
Black can separate and capture white's stone.
After white captures this stone, black hanes here.
This group has miai to live too.
If white extends, this atari is sente.
If white captures, black pushes and lives in the corner.
It doesn't work for white. Let's try another move then.
This extension is very calm, but powerful.
If black kosumis, like this, white will jump into the corner.
There isn't enough eye space.
This is the point at which black has to be most careful.
If black blocks here, white will play at the vital point.
This group is dead.
Even though black can block in sente, the eye space is too small.
Black can't make two eyes on the inside.
So how should black answer?
Even though it might look strange, this kosumi is the answer.
With this move, black's group lives easily.
Playing here is no use.
It's similar to the previous variation.
White has to capture, then black can make two eyes.
The extension is a bit tricky.
But with the kosumi, this group is safe.
If white attaches, black plays a tiger's mouth and still lives.
Black must be careful when white kosumis like this though.
It seems like black has enough space to live.
But, by reducing the eye space, white can harass black.
There's a vital point at the 1-2 point.
After that, there's another vital point here.
When white plays here, black has no proper answer.
In this case, securing one eye is better.
With the tiger's mouth, white can make an eye on both sides.
Even if white jumps, black can easily save this group.
In conclusion, white can't capture black when he invades at 3-3.
However, the invasion should be played at an appropriate time.
If white wants to secure the corner, this jump is the most efficient defense.
Depending on the situation, the owner of the corner will be decided later in the game.
This brings us to the end of the series.
Thank you for watching Becoming 5 Kyu!
I hope you'll keep working hard to improve.
Thank you very much!
Baduk TV English at GoGameGuru.com