(;FF[4]
CA[UTF-8]
GM[1]
GN[Becoming 9 kyu - Lesson 21]
PC[https://online-go.com/review/409504]
PB[Black]
PW[White]
BR[2d]
WR[2d]
OT[Error: time control missing]
RE[?]
SZ[19]
KM[6.5]
RU[Japanese]

;AB[na]
;AB[ob]
;AB[nb]
;AB[nc]
;AB[nd]
;AB[od]
;AB[pd]
;AB[qd]
;AB[qc]
;AB[qn]
;AB[qm]
;AB[rm]
;AB[sm]
;AB[sn]
;AB[ro]
;AB[qo]
;AB[qp]
;AB[dq]
;AB[eq]
;AB[er]
;AB[es]
;AB[fr]
;AB[gr]
;AW[ma]
;AW[mb]
;AW[mc]
;AW[md]
;AW[me]
;AW[ne]
;AW[of]
;AW[rf]
;AW[qe]
;AW[rd]
;AW[rc]
;AW[rb]
;AW[qa]
;AW[rl]
;AW[ql]
;AW[pl]
;AW[pm]
;AW[pn]
;AW[po]
;AW[pp]
;AW[pq]
;AW[qq]
;AW[sq]
;AW[sp]
;AW[so]
;AW[ds]
;AW[dr]
;AW[cq]
;AW[cp]
;AW[dp]
;AW[fo]
;AW[fp]
;AW[hq]
;AW[hr]
;AW[jr]
;B[]
;W[]C[Hi! Let's solve some life and death puzzles! Look at the upper right. Black has to rescue his group. Where's the vital point?

-- chat --
tpnZbonek: q19
Hermès: yep definitly q19
snakesss: cool tsumego
mark5000: Maybe this one was too easy. :)
]
(;B[pb]C[If Black tries to make an eye like this,

-- chat --
snakesss: no it wasnt
]
;W[pa]C[White can easily capture the black group. If you can find this move, this problem will be easy.

-- chat --
TheKraai: hi
]
;B[rq]
;W[rr]
;B[sr]
;W[ss]
;B[rp]
;W[sr]
;B[qr]C[

-- chat --
tpnZbonek: 1. From move 0: O19 P18 O18 O17 O16 P16 Q16 R16 R17 R6 R7 S7 T7 T6 S5 R5 R4 D3 E3 E2 E1 F2 G2 N19 N18 N17 N16 N15 O15 P14 S14 R15 S16 S17 S18 R19 S8 R8 Q8 Q7 Q6 Q5 Q4 Q3 R3 T3 T4 T5 D1 D2 C3 C4 D4 F5 F4 H3 H2 K2 pass pass Q18 Q19 S3 S2 T2 T1 S4 T2 R2 
tpnZbonek: ups didnt want to post it
tpnZbonek: dont look :d
]
)(;B[pa]C[You have to make an eye here first. After this move, Black is alive. Let's try to capture this group as White.]
;W[pb]C[This atari is a bit scary. How should Black respond?]
;B[qb]C[Cutting here is a good move.]
;W[oa]C[If White captures the black stone, it looks like a ko.]
;B[pc]C[But in this case, Black can atari here. White is short of liberties, so White can't save the two stones.]
;W[]C[Let's move on to the next puzzle. Look in the lower right. Black has to rescue his group. It looks like the group is in trouble now. The three white stones have a weakness, however.

-- chat --
snakesss: is this a connect and die or does that refer to smt more specific?
mark5000: It's a form of connect-and-die, yes
mark5000: I like to think of it as false ko
mark5000: Any ideas?
mark5000: lower right
p6109: s3
snakesss: s3
]
(;B[rq]C[First, Black needs to wedge here. It's easy to come up with.]
;W[rr]C[

-- chat --
mark5000: Now what?
tpnZbonek: T2
snakesss: cant connect cuz then one liberty short?
]
(;B[sr]C[This throw in is a good tesuji.]
(;W[ss]C[After White captures here,]
;B[rp]C[Black connects.]
(;W[sl]
;B[sr]
;W[sq]
;B[sp]C[

-- chat --
deterdettol: Mine. From move 0: O19 P18 O18 O17 O16 P16 Q16 R16 R17 R6 R7 S7 T7 T6 S5 R5 R4 D3 E3 E2 E1 F2 G2 N19 N18 N17 N16 N15 O15 P14 S14 R15 S16 S17 S18 R19 S8 R8 Q8 Q7 Q6 Q5 Q4 Q3 R3 T3 T4 T5 D1 D2 C3 C4 D4 F5 F4 H3 H2 K2 pass pass Q19 Q18 R18 P19 Q17 pass S3 S2 T2 T1 S4 T8 T2 T3 T4 
deterdettol: Mine?. From move 0: O19 P18 O18 O17 O16 P16 Q16 R16 R17 R6 R7 S7 T7 T6 S5 R5 R4 D3 E3 E2 E1 F2 G2 N19 N18 N17 N16 N15 O15 P14 S14 R15 S16 S17 S18 R19 S8 R8 Q8 Q7 Q6 Q5 Q4 Q3 R3 T3 T4 T5 D1 D2 C3 C4 D4 F5 F4 H3 H2 K2 pass pass Q19 Q18 R18 P19 Q17 pass S3 S2 T2 T1 S4 T8 T2 T3 T4 
be hope: instynkt solution?. From move 0: O19 P18 O18 O17 O16 P16 Q16 R16 R17 R6 R7 S7 T7 T6 S5 R5 R4 D3 E3 E2 E1 F2 G2 N19 N18 N17 N16 N15 O15 P14 S14 R15 S16 S17 S18 R19 S8 R8 Q8 Q7 Q6 Q5 Q4 Q3 R3 T3 T4 T5 D1 D2 C3 C4 D4 F5 F4 H3 H2 K2 pass pass Q19 Q18 R18 P19 Q17 pass S3 S2 T2 T1 S4 T8 T2 T3 T4 
]
)(;W[sr]C[Because of the cutting point, White can't connect here. Black still has two liberties.]
)(;W[qr]C[Therefore, White has to play here, and]
;B[sr]C[Black captures these three stones.]
;W[sq]C[Even if White recaptures,]
;B[sp]C[Black can create another eye. Remember the first move is to wedge!

-- chat --
snakesss: oh snap
SlowLarry: pretty slick 
]
;W[]C[Now let's look at the lower left. Black to live.]
;B[cr]C[First, Black has to cut. This move is easy to find.

-- chat --
snakesss: back
]
;W[br]C[After White ataris here, Black's next move is important.]
(;B[cs]C[Descending here doesn't work because]
;W[gs]C[White can poke out an eye here.]
)(;B[bs]C[Therefore, bending here is the answer.

-- chat --
deterdettol: Wow
]
(;W[cs]C[White can't capture here because of the snapback.]
;B[cr]LB[bq:A]LB[gs:B]C[Now A and B are miai.]
)(;W[gs]C[Even if White pokes out this eye here,]
;B[bq]C[Black can atari here. White still can't capture because of the snapback.

-- chat --
tpnZbonek: Mark i need to leave, but if i can suggest you some material for a lecture: double approach corner. Lets say we kakari corner, and opponent tenuki.. how to punish him worst?
tpnZbonek: thanks for lesson, see you
mark5000: See you!
deterdettol: Thank you for the lecture 
deterdettol: Lessons in English are so much better for me >.>
mark5000: That brings us to the end of today's lesson.
XiaoYep: Thanks a lot!
p6109: thanks
mark5000: When playing Go, don't respond to your opponent's moves blindly. Look for creative ways to live with your stones.
mark5000: In all three puzzles, the first and most obvious move turned out to be bad.
mark5000: Don't forget to read other moves!
deterdettol: I've learnt a lot today
deterdettol: Thank you once again
]
))))(;W[rp]
;B[rq]C[Because of the snapback, White can't capture this black stone.]
))(;B[rp]C[After White's atari, Black shouldn't connect here.]
;W[sr]C[If White connects here, Black can't save the group anymore.]
))(;B[cr]C[

-- chat --
snakesss: deter got it right imo
]
))(;B[qb]C[This move doesn't work.]
;W[pa]C[White would play here and reduce the black group to one eye. All of these puzzles are about finding two eyes.would play here and reduce Blathe black group to one eye. All of these puzzles are about finding two eyes.

-- chat --
Sleit: 2. From move 0: O19 P18 O18 O17 O16 P16 Q16 R16 R17 R6 R7 S7 T7 T6 S5 R5 R4 D3 E3 E2 E1 F2 G2 N19 N18 N17 N16 N15 O15 P14 S14 R15 S16 S17 S18 R19 S8 R8 Q8 Q7 Q6 Q5 Q4 Q3 R3 T3 T4 T5 D1 D2 C3 C4 D4 F5 F4 H3 H2 K2 pass pass R18 Q19 
]
))