(;FF[4]
CA[UTF-8]
GM[1]
GN[Becoming 9 kyu - Lesson 16]
PC[https://online-go.com/review/403119]
PB[Black]
PW[White]
BR[2d]
WR[2d]
OT[Error: time control missing]
RE[?]
SZ[19]
KM[6.5]
RU[Japanese]

(;AW[dc]
;B[de]
;W[dg]
;B[gd]
;W[dd]
;B[df]
;W[cg]
;B[cd]
;W[cc]
;B[ff]C[Hi! Let’s discuss connection. What move should White play here?

-- chat --
PavelKorolyov: Hello!. From move 0: D17 D15 D13 G16 D16 D14 C13 C16 C17 F14 
PavelKorolyov: Great!. From move 0: D17 D15 D13 G16 D16 D14 C13 C16 C17 F14 
Legault: I hope you don't mind me being here, I promise to keep my mouth shut unless I have a particularly burning question
mark5000: This lecture is text-based. There's no audio or video.
snakesss: hi mark
jillgoodgal: ready player one!
Camarao Salgado: hi everybody, i am joining in
kissmecomix: burning question why is a sdk doing here?
kissmecomix: spying?
PavelKorolyov: Hello everyone.. From move 0: D17 D15 D13 G16 D16 D14 C13 C16 C17 F14 
Owt Reyalp: i want to be a 9k. please
snakesss: no, going over basics again and again is how you git gud
Legault: Curiosity and a lack of a desire to play Go, but wanting to study
Legault: This seemed to fit the bill
kissmecomix: touche 
Icedrinker: hi
snakesss: besides, 6kyu doesnt guarantee sdk strength
snakesss: maybe he just a blitzer :P
mark5000: What move should White play here?
paradigmadox: c15
kissmecomix: double touche snakess
PavelKorolyov: c15?
Luiskaotsa: B15?
Ewen: b15
Legault: b16
kissmecomix: b16
mark5000: Yes, those are the answers I'm looking for.
Camarao Salgado: how are you two measuring how much it is worse?
snakesss: that could be a lecture topic :D
snakesss: a good one too
Camarao Salgado: i guess... still curious
mark5000: You count the difference in score between White to play and Black to play.
snakesss: you play it til the end in your head and compare 2 situations which dans can do almost intuitively
snakesss: it is almost clear what points got exchanged without reading it per se, right?
mark5000: To see more lectures like this, find my whole series here: https://forums.online-go.com/t/becoming-9-kyu-a-series-for-beginners/3809
snakesss: i think the diff between 30 and 40+points estimate by 2 dans was cuz one considered the weak white group more?
mark5000: Yeah, if White severs and captures six stones, that's 12 points just by itself, plus all the empty points around them.
mark5000: The fact that capturing also connects White's stones together is also worth something.
Camarao Salgado: i see
Levvo: It is copyrighted yes, so even if I knew where to find one I can't tell you ;)
Levvo: actually  I don't XD .. I have a copy of the book.
Levvo: Anyhow, i'm off! =) ... See you! :D
]
(;W[ce]C[Cutting here is the worst move.]
;B[cf]C[With this counter-atari, Black can easily separate White.]
)(;W[bd]C[Many players can think of this atari.

-- chat --
paradigmadox: what about c14 as an answer from Black?
]
(;B[ce]C[If Black connects here,]
;W[be]C[White pushes and connects under.]
;B[bf]C[If Black tries to cut like this,

-- chat --
Levvo: Yay! This feels suiting for me after not playing for forever :D .. 
]
;W[cf]C[White can capture the stone. Black won't answer that simply though.

-- chat --
Icedrinker: yay
PavelKorolyov: Great.
onfree: иге идфсл сфт скуфеу цфдд
Legault: there is a problem though
onfree: ....
onfree: but black can create wall there?
]
;B[bg]
;W[bh]
;B[ch]C[

-- chat --
markchung777: 1. From move 0: D17 D15 D13 G16 D16 D14 C13 C16 C17 F14 B16 C15 B15 B14 C14 B13 B12 C12 
]
)(;B[be]C[Blocking here is a strong move.]
;W[ce]C[In response, White has to capture this stone.]
;B[cf]C[After that, Black ataris.]
;W[bf]C[After White cuts,]
(;B[bg]C[Black can atari and separate the two stones.]
;W[ae]
;B[bh]
)(;B[ae]C[If Black has enough ko threats, descending here also works. This means that Black may separate or capture even more stones. So it's a failure for White.

-- chat --
snakesss: white is cut, black succeeded
snakesss: what a master player
Legault: White a15 reverts back to the other variation though
]
)(;B[cd]TR[bc]TR[bg]C[Capturing straight away is also possible, because of the two cuts left behind. But it doesn't work in this particular case.]
)))(;W[be]C[This knight’s move is a wonderful tactic. This is the answer. When White plays here, the white groups are all connected.]
(;B[bd]C[Let's try to separate White. If Black plays here,]
;W[ce]C[White cuts and captures the two stones.]
)(;B[ce]C[If Black connects,]
;W[bd]C[White can easily connect. It's the same as before.]
)(;B[bf]C[This attachment is the strongest response.]
;W[cf]C[White can cut here though.]
;B[ce]
;W[bd]C[After connecting, White can capture the black stone. It's also the same as before. Remember the knight's move on the second line!

-- chat --
PavelKorolyov: Ok, thnx.
mark5000: Next we'll look at connecting along the first line.
]
)))(;B[pq]
;W[qo]
;AW[qj]
;AW[nq]
;B[po]
;W[pn]
;B[oo]
;W[qp]
;B[oq]C[

-- chat --
snakesss: black's*
]
;W[mp]
;B[qq]
;W[iq]
;B[pl]
;W[on]
;B[nn]
;W[ol]
;B[ok]
;W[nl]
;B[qk]
;W[no]
;B[mn]
;W[nr]
;B[rm]
;W[pm]
;B[qm]
;W[qn]
;B[rq]C[

-- chat --
jillgoodgal: this is an invasion move even without the rescue necessary
mark5000: That's what shusaku had in mind when he played here.
mark5000: That's all I have for today. Thanks for watching!
jillgoodgal: takes at least four points from white
snakesss: so whats the point worth of this rescue?
Luiskaotsa: Thanks, Mark!
]
;W[rk]TR[oo]TR[po]TR[oq]TR[pq]TR[qq]TR[rq]C[This position comes from a Shusaku game. Black needs to rescue six stones. How should Black play now?

-- chat --
banakula: T5
Luiskaotsa: S4 or S6
jillgoodgal: T5
snakesss: t6?
shinuito: T6 or T4?
snakesss: t4
PavelKorolyov: M5 ?
Luiskaotsa: Sorry T4 or T6
clackie: t5
Levvo: :D
snakesss: this is clearly monkey business :D
mark5000: o/ Levvo
Cammilo: T6
mark5000: Remember this shape.
mark5000: Either diagonal on the first line is the answer.
Legault: Out of curiosity, which Shusaku game is it?
mark5000: Not really.
clackie: Shusaku vs. Piston Honda?
Levvo: Blacks shape is too good for shenanigans :D .. To many liberties ^^ 
mark5000: Here is the game: ps.waltheri.net/database/game/14426/
Legault: Thanks
snakesss: ^^
]
(;B[so]C[A Go proverb says, "In a symmetrical position, play in the center." So many of you thought of this knight's move. In fact, it's wrong.

-- chat --
Levvo: Nice seeing you still teaching! ;)
piccolo3: hi too :)
mark5000: You can't apply Go proverbs in every situation.
Legault: Heresy
mark5000: In this case, this knight's move isn't the answer.
Levvo: Pretty sure there is ONE go proverb that would fit any situation though! ;)
jillgoodgal: then S6
clackie: snek was right then?
clackie: monkey beezwax?
shinuito: So the answer wasn't tengen?
mark5000: If proverbs fit every situation, they would not be proverbs they would be rules.
]
(;W[sp]C[White will attach on one side or the other and cut Black.]
;B[rp]C[If Black ataris,]
;W[sn]C[White can counter-atari here. So Black can't connect.]
(;B[rn]C[

-- chat --
snakesss: oh i see
snakesss: how you meant "white's"
snakesss: thanks again
]
;W[ro]
)(;B[ro]C[

-- chat --
shinuito: slick
]
;W[rn]
))(;W[sn]
;B[rn]
;W[sp]
;B[rp]
))(;B[rn]C[Some of you thought of s6 or s4. These moves are even worse.]
;W[ro]C[White can separate directly.

-- chat --
Legault: Savage
]
)(;B[sn]C[Black needs to diagonal like this. Let's try to cut Black.

-- chat --
clackie: monkey biznass!
mark5000: For White, there's no way to cut Black off.
jillgoodgal: thank you
Levvo: Thank you sensei <3
snakesss: thanks for the lectures!
PavelKorolyov: Thanx!
Camarao Salgado: thanks
Legault: Well black no longer has to worry about the corner's status for one
mark5000: The rescue is worth a lot. Maybe 30 points.
snakesss: oof
PavelKorolyov: Mark500 Senseeeeei.
Levvo: I'd say 40+ XD
Levvo: Depending on how you count :P
mark5000: :P
]
(;W[so]C[If White attaches here,]
;B[ro]C[Black can capture this stone.]
;W[rp]C[Even if White ataris,]
;B[sp]C[Black can still connect.]
)(;W[sp]C[This jump doesn't work either. ]
;B[rp]C[Black can still capture this stone.]
)(;W[rp]C[If White plays here,]
;B[sp]C[Black can still connect.]
(;W[rn]
;B[so]C[White can't cut Black.]
)(;W[rl]
;B[ql]
;W[rn]
;B[sm]
;W[so]
;B[ro]
;W[qc]
;B[pc]
;W[so]
;B[qd]
;W[ro]
;B[om]
;W[nm]C[

-- chat --
snakesss: doesw s8 do anyhing?
snakesss: nvm
]
)))(;B[sp]C[The other diagonal works too. Remember these connecting tactics!]
)))