(;FF[4]
CA[UTF-8]
GM[1]
GN[Becoming 9 Kyu - Lesson 39]
PC[https://online-go.com/review/435391]
PB[Black]
PW[White]
BR[2d]
WR[2d]
OT[Error: time control missing]
RE[?]
SZ[19]
KM[6.5]
RU[Japanese]

(;AB[qd]
;AB[pq]
(;B[od]
;W[qo]C[Hi! Let's look at big moves played on the sides. First of all, a pincer is one example. Fundamentally, a pincer is played to attack your opponent by taking away their base.

-- chat --
mark5000: Hello!
snakesss: hellu, finally caught one - been a while
Cautiousford: Hi.
recovery791117: hello. From move 0: R16 Q3 P16 R5 
Dario D.: hi
DatoGomarteli: hi
xPillow: you seem to have alot of content on this site mark
xPillow: are you affiliated in some way?
jeandelalune: hi
mark5000: I moderate. But I like creating Go content, and OGS is an excellent platform.
ZbigniewWodecki: Hello
mark5000: It's where the players are, so why not?
bensch: hi
oh come off it: hi
xPillow: have you thought about doing youtube channel
byssh3: Good morning. :)
]
(;B[qk]C[Shall we try the pincer we learned in the last lesson? After this pincer, white has little space to extend along the side. This is the main intention of a pincer attack.]
)(;B[qj]C[Because of that, there's no four-space pincer.]
(;W[ql]C[Here, White can extend two spaces. So Black's move is an extension rather than a pincer. That's why you've never heard of a four-space pincer.]
)(;AE[qj]
(;AB[qk]C[The three-space pincer is generally the maximum distance that still lets you attack. Let's discuss the benefits of a three-space pincer. It both attacks White and expands Black's framework here. Because of that, this move kills two birds with one stone.

-- chat --
Tingale: hi everybody
mark5000: o/
]
)(;W[ql]C[If White is able to extend here, Black's framework will be erased, and attacking White will become difficult.]
;AE[ql]
;B[qk]C[So this pincer is a good move here. Let's see another example.]
))))(;B[oc]
;W[po]
;B[qo]
;W[qn]
;B[qp]
;W[pn]
;B[nq]
;W[qj]C[This is a joseki. Approaching on the side is also big.]
;B[qh]C[Here, this approach is a good move.  If you can invade your opponent's framework next, it's even better.

-- chat --
bugcat: Can I ask a related question, mark?
]
(;AB[ql]C[If White plays elsewhere, this invasion works. Even though White's position is well organized, White needs to defend after this approach. Now this invasion is severe.

-- chat --
p6109: would you play R12 before another corner?
ZbigniewWodecki: rather after corners
mark5000: I assume the corners are occupied.
p6109: thx
Atakue: hi
snakesss: would you play it before and enclosure/approach?
mark5000: If a corner is not occupied in moves 1-4, then that is usually the most important move.
snakesss: an enclosure*
mark5000: If the corners are occupied by single stones, then this approach is just as big as approaching those single stones.
Tingale: how the invasion work ?
ZbigniewWodecki: I surely will
]
(;W[pl]C[In response, White may attach and enclose black.

-- chat --
ZbigniewWodecki: here is a question
ZbigniewWodecki: what about defending in Q9
mark5000: Q9 can be better, actually
ZbigniewWodecki: because now u can extend and connect under
mark5000: No wonder you're 6 kyu :P
]
(;B[qk]C[But bumping here is ok.

-- chat --
ZbigniewWodecki: but still i learn a lot here
]
(;W[pj]C[This stretch prevents black from connecting, but it's dangerous.]
;B[pk]C[If Black pushes here, it exposes many weaknesses.]
)(;W[pk]C[So blocking here is the proper answer.]
;B[rj]C[Then Black can connect and get territory easily.]
;W[pj]
;B[ri]C[If White manages the white group badly, it will be floating in the center. Approach moves are bigger when they create good follow ups like this.]
))(;B[pk]C[Black should also consider cutting here. Black may try for good influence instead of stealing White's base.]
;W[qk]C[White has no choice but to cut.]
;B[ol]C[Then Black can atari here to start building influence.]
;W[pm]C[White again has little choice but to comply.]
;B[pj]C[After Black stretches here, White needs another move to ensure two eyes.]
;W[rl]C[A Black move here would be severe, so White should answer here now.

-- chat --
bugcat: Hello Mark, helllo everyone!
]
;B[qi]C[Then Black can complete the influence. This is another way that Black can choose after invading.]
))(;W[pk]C[This diagonal was mentioned in the comments. It's an alternative to the attachment, which doesn't work well.]
;B[pl]C[Black should stand up to prevent White from connecting the groups together. Even if the outcome is unclear, keeping your opponent separated is often the only way to fight back and make an even result.

-- chat --
bugcat: I've recently been playing a version of this opening with the shimari at O17, it'd be nice if we could go over that at some point
ZbigniewWodecki: hi
bugcat: mark5000: Is Q6 better for White than Q7 in this opening or does it not matter?
mark5000: Ah, perhaps in another lesson. This one is focused on side moves rather than corner patterns.
bugcat: ah, ok
mark5000: And it doesn't matter. They're about equal. This one is more popular with pros recently. Each one has different patterns.
bugcat: ok, thanks
]
;W[ol]C[White should block here for the same reason, trying to link up and prevent Black from escaping.]
;B[rl]LB[rj:C]LB[ok:A]LB[rn:B]C[In this case, descending is a cool move. Black can play this now or after cutting at A. It aims to make miai of B and C for connecting under. After this move, Black can survive, and White is fragmented and has many weaknesses. This, too, isn't that great for White.

-- chat --
mark5000: Try this one out ZbigniewWodecki  :)
]
))(;W[oj]C[To prevent Black's invasion, White should jump here. There's another type of approach move in which you aim to attack.

-- chat --
mark5000: Ask away. We're about to move on.
bugcat: I've recently been playing this sort of opening a lot against KataGo and it likes to play Q4 as White very early on -- what do you think of this?
rarandomra: how p10 defends r8-s8?
mark5000: Q4 is a probing move. It's beyond the scope of this lecture aimed at beginners. See https://online-go.com/joseki/9978 for details.
bugcat: OK, thanks :)
mark5000: For beginners, the important part is that Black's approach at R12 is good!
mark5000: And if Black approaches, White should jump to discourage invasion.
syoon: it also lets white cap at P12
mark5000: Indeed
mark5000: A move that has good follow ups is also more valuable.
mark5000: Let's look at another type of approach move in which you aim to attack.
]
;B[ql]C[How does P10 defend against this invasion?]
;W[pl]C[If White attaches here, same as before,]
(;B[rl]C[This descent is still miai. At the same time, White's shape is more resilient.

-- chat --
rarandomra: is this still miai?. From move 0: R16 Q3 P17 Q5 R5 R6 R4 Q6 O3 R10 R12 P10 R8 Q8 S8 
bugcat: not even a direct ko
]
;W[ro]C[If White blocks here, for example, the P10 stone will become useful.]
;B[rj]C[When Black links up here, it rescues the invasion. But there will be a cost in influence paid to White.]
;W[qk]C[First, White can force this connection.]
;B[rk]
;W[qi]C[Then White can force this connection.]
;B[ri]
;W[ph]C[Then White can bend here. The P10 stone occupies the vital point in white's shape. White isn't floating in this case; White is making good influence.

-- chat --
bugcat: /me has derailed the lecture
bugcat: mwahahahahaha
]
)(;B[qk]C[And Black bumps here,]
(;W[pj]C[Now White can stretch up here, and the P10 stone makes it less worrisome for White.]
;B[pk]C[If Black cuts through,]
;W[ok]C[White should block here. P10 already defends one of the cutting points, so it's harder for Black to get a good result.]
;B[pm]
(;W[ol]
;B[qm]C[

-- chat --
bugcat: this is bad for Black then?. From move 0: R16 Q3 P17 Q5 R5 R6 R4 Q6 O3 R10 R12 P10 R8 Q8 R9 Q10 Q9 P9 Q7 P8 R7 
]
;W[om]C[This would be the expected result if Black continues, I think.

-- chat --
mark5000: We're getting a bit into the weeds. I hope everyone is still with me.
]
;B[rn]C[

-- chat --
syoon: black can also just attach on the bottom
]
)(;W[om]
;B[ol]
;W[nl]
;B[on]
;W[nm]
;B[qm]
;W[oo]
;B[nn]
;W[no]
;B[mn]
;W[rm]
;B[rj]
;W[ri]
;B[rl]
;W[rn]C[

-- chat --
ZbigniewWodecki: ok
]
))(;W[qi]C[White can also bump here. It's similar and also affects the R11 stone. Because of these options, Black's invasion at R8 is less powerful after White jumps to P10.theBlack's invasion at R8 is less powerful after White jumps. to P10.]
)))))(;AB[pd]
(;AB[pq]
;B[kq]
;W[qo]
;B[op]
;W[pm]LB[qk:A]C[In this case, approaching at A is a good move.]
(;B[qk]C[This move aims to attack white.

-- chat --
mark5000: Kicking after the approach, right?
ZbigniewWodecki: yes
mark5000: R3 after the approach is good.
mark5000: You're showing your SDK again.
ZbigniewWodecki: I just follow the "corners first" rule
mark5000: For beginners, it can be easier to understand bases and how to undercut them.
snakesss: xD
bugcat: you're showing your dan, mark ;)
mark5000: I hope newer players find this interesting or helpful.
p6109: what is an open position?
mark5000: An open position is one where not many stones have been played.
p6109: thx
snakesss: i find this very helpful - this is one of the positions i have most trouble with
ZbigniewWodecki: btw what does SDK mean?
snakesss: single digit kyu
bugcat: I don't play Q7 when Black has the top right so I don't get into this much
mark5000: If there's a wide distance between stones on the board, then attaching will not make your opponent over-concentrated. There are no stones nearby to over-concentrate.
ZbigniewWodecki: thx
mark5000: For the SDK players, White's best local is probably O5
Cautiousford: This was very helpful. Thanks so much. 
bugcat: ... I wouldn't have got O5
mark5000: But check AI if you're curious.
ZbigniewWodecki: i am happy
ZbigniewWodecki: causer i was aiming there
Tingale: thanks
]
(;AB[rm]C[If White plays elsewhere, Black can slide here and chase white into the center.

-- chat --
snakesss: looks a bit like chinese now - can white attach at r3 or is it bad to do so immediately?
ZbigniewWodecki: I dont get, why not R4
snakesss: i mean before s7
ZbigniewWodecki: in general
]
)(;AB[qp]C[If White plays elsewhere, kicking here is also nice.]
)(;W[ql]C[But locally speaking, this kick is a bad exchange.

-- chat --
bugcat: can White play Q9 here?
]
;B[pk]C[That's because white can't attack black or make black's position over-concentrated. Since it makes black stronger, it's a bad exchange. In fact, it's hard for White to respond here. That's why Black's approach is good.]
)(;W[pk]C[White can also think about this attachment. But it, too, will strengthen black.

-- chat --
bugcat: mmm
]
;B[pj]
;W[ok]
;B[ql]C[Remember: attaching makes your opponent stronger. Sometimes this is acceptable or necessary. But rarely in open positions like this.

-- chat --
snakesss: double keima is risky sooo jump or kosumi are 2 choices left
bugcat: Dave says I play too much kosumi :<
bugcat: gotcha
snakesss: i bet both viable but jump better
mark5000: White should tenuki
]
))(;B[qg]C[How about this enclosure?

-- chat --
mark5000: Is this move good?
bugcat: yes
snakesss: seems slack
ZbigniewWodecki: slow
]
;W[qj]C[Then White will extend and settle down. Black loses a good opportunity. You shouldn't miss these vital points in the opening. Now we'll turn to splitting plays.

-- chat --
snakesss: weak groups first
bugcat: good stuff
]
))(;AB[qp]
;B[oq]C[

-- chat --
bugcat: I haven't split the orthodox for years :P
]
;W[qc]
;B[qd]
;W[pc]
;B[oc]
;W[ob]
;B[nc]
;W[nb]
;B[mc]C[When splitting your opponent's framework, you need to look for a place where you'll be able to extend in both directions.

-- chat --
mark5000: Let's make it more modern then :P
bugcat: ok ^^
snakesss: coool
bugcat: I play R5 ;)
mark5000: Splitting is still a thing
]
(;W[qj]C[

-- chat --
bugcat: I know, just having a banter
bugcat: Sorry, go on
ZbigniewWodecki: that bad in general?
]
(;B[qh]C[For example, if Black approaches here,

-- chat --
snakesss: old players still relevant, mkay?
bugcat: ^^
]
;W[qm]C[White can extend.]
)(;B[ql]C[If Black plays here,]
;W[qg]C[White can extend on the other side. That's a splitting play. This is one of the big moves on the side. Let me explain why.]
))(;AB[pj]C[If Black plays in the middle of the framework, it'll get a lot thicker. If White wants to reduce the framework, White has to invade.]
)(;W[qh]C[If White invades at the top,]
;B[qj]C[The lower part will be completed as Black attacks the stone.]
)(;W[ql]C[If White invades here,]
(;B[qj]C[Black's upper right area will likely get larger. 

-- chat --
ZbigniewWodecki: QUESTION
ZbigniewWodecki: is extending to R6
ZbigniewWodecki: with white
ZbigniewWodecki: thanks
]
(;W[qn]C[

-- chat --
ZbigniewWodecki: yes
snakesss: i like it - then horse jump
snakesss: but this is horrible at high level
mark5000: What snakesss said
mark5000: It's not awful, but it's also far from ideal.
bugcat: you like this as White, snakesss? I don't
mark5000: It's over-concentrated
snakesss: not in this particular position but i lik the small bse horse jump combo
bugcat: oh, sure, in general
bugcat: yeah many times I could use it in general
mark5000: White doesn't have enough space to make two eyes and live, so Black will chase white into the center and expand the upper right framework.
ZbigniewWodecki: alright
]
)(;W[ok]C[

-- chat --
mark5000: In that case, it would be much better to challenge the framework.
mark5000: Directly
bugcat: I'd play Q9 and Dave would shout at me :P
bugcat: I'm working on it
]
))(;AE[ql]
;AW[qj]C[To prevent this, White should split here. In response, Black should approach from the side where Black has a better framework. In some cases, it's possible to leave this area for later. So Black can decide where to approach at a later stage. Let's look at our final example.

-- chat --
Playful_Wind: 1 or 2 is the better framework?. From move 0: Q16 R4 P3 R17 R16 Q17 P17 P18 O17 O18 N17 R8 R8 R10 
]
)))(;B[pp]
;W[qf]
;B[nd]
;AB[qn]
;W[ql]C[Invasions on the side can be excellent. We often see this sort of position in handicap games. In general, White players focus on speed in handicap games. Without finishing the joseki, White approached here.]
(;B[oq]C[Some players like territory, so they enclose the corner like this. Of course, this move is good and worth one move.]
)(;B[qi]C[But since White's position is weak, this invasion is a nice move. Even though White is a stronger player, White will be surprised by this invasion. By invading here, Black separated white into two weak groups. It's hard for White to deal with this situation. So, even in handicap games, look carefully at each position. When your groups are solid, you should punish your opponent's thinness like this. When that condition is satisfied, you can invade no matter how early it is. Even though white is a stronger player, White will be surprised by this invasion. By invasding here, Black separated white into two weak groups. It's hard for White to deal with this situation. So, even in handicap games, look carefully at each position. When your groups are solid, you sohould punish your opponent's thinness like this. When that condition is satisfied, you can invade no matter how early it is.

-- chat --
bugcat: >:3
mark5000: That brings me to the end of today's lesson.
snakesss: long one :P
Tingale: thanks a lot
p6109: thx
snakesss: thanks
Xaloc: thanks
mark5000: I hope you picked up some useful tricks for handling the side areas.
bugcat: Thanks, mark
bugcat: Good lecture
mark5000: It was longer because there was more material: pincers, approaches, splitting plays, and invasions.
mark5000: All wrapped up in the topic: how to handle side areas
mark5000: You can't skip that stuff :P
mark5000: The lessons are precisely as long as they need to be
snakesss: except for bugcat and me talking
mark5000: hehe
mark5000: thanks for watching.
mark5000: This lesson is part of my lesson series https://forums.online-go.com/t/becoming-9-kyu-a-series-for-beginners/3809
mark5000: Catch the next one same time next Saturday
ZbigniewWodecki: Thank you
ZbigniewWodecki: see you next time
]
))))