(;FF[4]
CA[UTF-8]
GM[1]
GN[Becoming 9 Kyu - Lesson 52]
PC[https://online-go.com/review/469734]
PB[Black]
PW[White]
BR[2d]
WR[2d]
OT[Error: time control missing]
RE[?]
SZ[19]
KM[6.5]
RU[Japanese]

(;B[cp]
;W[eq]
;AW[dn]
;B[cn]
;W[do]
;B[co]
;W[dm]
;B[cl]
;W[ek]
;B[ck]
;W[cq]
;B[dp]
;W[ep]
;B[dq]
;W[dr]
;B[cr]
;W[er]
;AW[cm]
;B[bm]
;W[bq]
;B[br]
;W[bn]C[

-- chat --
old player: thia hane tesuji A2 wont work if white dont play B6. thats the point
]
(;B[bo]C[Hi! Let's look at how to rescue stones with shortage of liberties. Here's a capturing race between Black and White's two stones. This example comes from a professional game from 1944 between two Japanese professionals. It seems like White will lose the capturing race, because White only has two liberties. But if White uses the dead stone effectively, White can win the capturing race.

-- chat --
jillgoodgal: great glad I happened to be on now
mark5000: This is a text-based lesson without audio or video. Find past lessons at https://forums.online-go.com/t/becoming-9-kyu-a-series-for-beginners/3809
mark5000: Great to have you!
obimiau: thanks a lot
Sports for Life: hi
Sports for Life: can you accept my game challenge
mark5000: Sorry, no
Sports for Life: why
BHydden: sports this is a teaching room please don't clutter chat, you have your answer so please drop it
Sports for Life: got it 
jillgoodgal: white to move next?
Sports for Life: i think so
mark5000: Yes, White to play.
mark5000: Sorry, I had an emergency with my two-month old
Sports for Life: is it a boy or girl
Mapaor4: I have no clue on how to save the white stones
Sports for Life: neither do i
Gliss: white A6>
Gliss: ?
Sports for Life: what is a libertie?
hopser: @mark5000: hopefully it's all ok. take your time
obimiau: a5
Gliss: a5*
Sports for Life: a5 is a libertie?
jillgoodgal: yes B4 works
Sports for Life: this is so confunsing
Sports for Life: confusing
Sports for Life: i am so lost
Sports for Life: someone please explain 
Mapaor4: I think the first move would be hane at A2 too
Sports for Life: what is hane
Sports for Life: block = stone?
Sports for Life: now i get it 
Sports for Life: thx floyduk
Sports for Life: will try
jillgoodgal: white has to use a forcing move to make this work
mark5000: What's the tactic then?
mark5000: Some of you found it.
obimiau: extend to get more liberties??
mark5000: All right. I hope to see you all the next time!
mark5000: I hope I can start at 8:00 am Pacific Time instead of waiting for hours.
mark5000: I have just two more lessons in this series and then I might call it quits for now.
]
(;W[rn]C[

-- chat --
Sports for Life: mine variation. From move 0: C4 E3 D6 C6 D5 C5 D7 C8 E9 C9 C3 D4 E4 D3 D2 C2 E2 C7 B7 B3 B2 B6 B5 S6 
oguzgencer: Should we save the Black against to you?
oguzgencer: B6 already taken ı guess
oguzgencer: We can focus to the b3 c3 to save ?
floyduk: https://senseis.xmp.net/?Hane
]
)(;W[aq]C[How about stretching here?


-- chat --
old player: Hane at A2 seems fine
Sports for Life: why?
]
(;B[ar]C[It isn't a good move, because Black can capture White's stones after blocking here. White can't use the shortage of liberties.

-- chat --
Holonium: hane = block
]
)(;B[ap]C[If Black answers like this,]
;W[ar]C[White can capture Black's two stones.]
;B[bp]C[Black can't play here because of a shortage of liberties. But because the first move works, White loses the capturing race.

-- chat --
Haze_with_a_Z: because you don't know any of the terms, sports
Sports for Life: i know how to play but i don't get these fancy words
]
;W[ao]C[

-- chat --
old player: watchout. From move 0: C4 E3 D6 C6 D5 C5 D7 C8 E9 C9 C3 D4 E4 D3 D2 C2 E2 C7 B7 B3 B2 B6 B5 A3 A4 A2 B4 A5 
]
))(;W[ar]C[In this case, this bend is a good tactic. Now the two black stones are captured.

-- chat --
jillgoodgal: if white extends black just extends underneath
buttoXXX: B-A5, W-A6, B-A-4
buttoXXX: Sorry, W-A5, B-A6, W-A4
buttoXXX: B can't capture W because of liberty shortage
]
(;B[ap]C[If Black diagonals,

-- chat --
Mapaor4: Sports for Life go to: learn-go.net please
Mapaor4: https://senseis.xmp.net/?CommonGoTerms
Mapaor4: if white hanes at A2 then black goes to A4?
]
;W[cs]C[White simply ataris and captures Black. bcaptures Black.]
)(;B[bp]C[So this atari is Black's only option.]
;W[aq]LB[an:B]LB[ap:A]LB[bs:C]C[When White connects here,

-- chat --
old player: like thia. black Cant play A. . From move 0: C4 E3 D6 C6 D5 C5 D7 C8 E9 C9 C3 D4 E4 D3 D2 C2 E2 C7 B7 B3 B2 B6 B5 A2 B4 A3 
Mapaor4: but why should Black let those stones die? He could just kill at A6 and save them except the two ones
]
(;B[ap]C[Black can't atari here because of the upper white stone.

-- chat --
jillgoodgal: no!
]
;W[ao]C[

-- chat --
old player: watchout (hane. From move 0: C4 E3 D6 C6 D5 C5 D7 C8 E9 C9 C3 D4 E4 D3 D2 C2 E2 C7 B7 B3 B2 B6 B5 A2 B4 A3 A4 A5 
]
)(;B[an]C[So Black must capture.]
;W[cs]C[After that, White has time to capture the two black stones. Let's look at another example. lLet's look at another example.

-- chat --
floyduk: Aji can bite you in the butt
floyduk: Even one stone
]
)))(;W[ap]C[This diagonal is conceivable.

-- chat --
Sports for Life: i can't find how to learn about these terms on that website
]
;B[an]C[But if Black captures this stone, White has no proper move now.

-- chat --
Sports for Life: black is good
]
;W[ar]C[If White bends here,

-- chat --
Sports for Life: i'm off
floyduk: sensei's library is a good reference for what these words mean Sports
OldLion: Start with A5
]
;B[bp]C[Black ataris.

-- chat --
Sports for Life: ok thx
]
;W[aq]C[Even if White connects,

-- chat --
floyduk: Good link Mapaor4
]
;B[ao]C[Then White's group dies. It's another failure.

-- chat --
mark5000: Thanks!
mark5000: Sensei's is a great place to start.
Sports for Life: ok
mark5000: You need patience to learn Go well.
Sports for Life: i'm excited
]
)(;W[ao]C[Several people guessed this move.

-- chat --
floyduk: Ah.. well bizarrely I'm jealous. I miss feeding my two
]
;B[an]C[But Black can just capture a stone. So it's not working well.]
(;W[ap]C[

-- chat --
Mapaor4: and after A4?
Mapaor4: I don't get it, Black can first protect at B6 and then kill
]
)(;W[ar]C[White can't bend here anymore because ]
;B[bp]
;W[aq]
;B[ap]C[This atari now captures a stone, ensuring Black's life and White's capture.]
)(;W[bp]C[This is conceivable to induce shortage of liberties.]
;B[ap]C[But again, Black can just capture here. That's why A2 is the only choice for White.]
))(;W[an]C[

-- chat --
BlueIvy: A6 works
]
;B[ao]C[

-- chat --
BlueIvy: W A6, B A5, W A2
BlueIvy: oh im sorry
]
))(;B[an]
;W[bo]
;B[bp]
;W[ap]C[

-- chat --
old player: A6 die black. From move 0: C4 E3 D6 C6 D5 C5 D7 C8 E9 C9 C3 D4 E4 D3 D2 C2 E2 C7 B7 B3 B2 B6 A6 B5 B4 A4 
]
)(;B[bp]
;W[bl]
;B[aq]
;W[am]C[

-- chat --
old player: Black separated if take White 2 stones. From move 0: C4 E3 D6 C6 D5 C5 D7 C8 E9 C9 C3 D4 E4 D3 D2 C2 E2 C7 B7 B3 B2 B6 B4 B8 A3 A7 
]
))(;AB[ac]
;AB[bc]
;AB[cc]
;AB[db]
;AB[ec]
;AB[fb]
;AB[ee]
;AB[ef]
;AB[de]
;AB[cf]
;AB[bf]
;AW[bd]
;AW[cd]
;AW[dc]
;AW[dd]
;AW[ce]
;AW[df]
;AW[dg]
;AW[cg]
;AW[bg]C[Here's another capturing race. Black's group has two liberties, white White has three. It looks like Black's group is captured. But if White exploits shortage of liberties skillfully, Black can win the capturing race. Can you guess what the move is? Can you guess what the nmove is?

-- chat --
mark5000: Blue Ivy, hit the sync button
hopser: A15 looks nice(?)
]
;B[ae]C[If you came up with this diagonal, you have a good sense of Go tactics. Diagonals on the first line are often vital points.]
(;W[ad]C[White can't separate Black like this. Even if Black plays elsewhere, White's group is already dead.]
;AW[ag]C[Because of White's shortage of liberties, White has to descend here first.]
;B[ed]C[But with this atari, Black can capture White's group. So White's move isn't good.]
)(;W[be]C[So this atari is the only alternative for White.]
;B[af]C[But after Black connects,]
;W[ad]C[White can't play here. This is all because of Black's diagonal move. It's self-atari. With the diagonal, Black successfully captures White. move. It's self-atari. With the diagonal, BLack successfully captures White.

-- chat --
jillgoodgal: for once not a connect and die situation
mark5000: Yeah, I wanted to show some shortage of liberties situations that aren't connect-and-die, aren't making a living group, and aren't just capturing stones.
floyduk: It's like "pre-surrounding" the enemy. Take away the liberties they will have a move or two from now
mark5000: Shortage of liberties ahppens often in real games!
jillgoodgal: usually to me!
mark5000: Even if you don't have a shortage of liberties in a game, it could arise in the reading that you do. Maybe you can see a shortage of liberties situation coming and avoid it in advance.
mark5000: But, before you can exploit a shortage of liberties, you need to be careful not to use up your own liberties.
mark5000: Try not to fill liberties blindly. It's a bad habit.
jillgoodgal: these are interesting because the first approach is not on outside
mark5000: And during a capturing race, you need to pay careful attention to your moves.
mark5000: That's all the material I prepared for today. Any questions about shortage of liberties or related tactics?
floyduk: This was great. Thank you Mark. Hope the little one is ok
jillgoodgal: it gets tricky right on the corner
obimiau: thanks mark
jillgoodgal: thank you very much!
mark5000: Thanks too! She spit up on me four times during this lesson..
floyduk: Hehe... colic?
floyduk: My first had that bad
mark5000: Haha, no. Not colic, thankfully. But some kind of reflux thing going on.
]
)))