Go (Baduk, Weiqi) problems with solutions

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Direction of play and tesuji problem 022

22 Black to play. /\\ is a sharp tsuke. Does Black have an equally sharp answer?

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
ST[2]
AB[do][en][dm][fm][gm][em]
AW[dq][eo][ep][fn][gn][hn][el][co]
C[22
Black to play
/\\ is a sharp tsuke. Does Black have an equally sharp answer?]
TR[co]
(;B[cp]
TE[1]C[Correct answer
Yes: the hane 1.
See the continuation]
;W[dp];B[bo]
(;W[dn]
C[See the variation]
;B[cn]
C[…If White connects, Black plays in the corner. It turns out that instead of expanding their area, White’s awkward tsuke has only reduced it.]
)
(;W[cn];B[bn]
(;W[cq];B[bp];W[cm];B[cl];W[bm];B[bl]
C[…Here both sides strain to the utmost, and in the end Black does manage to connect.]
LB[bl:11][bm:10][cl:9][cm:8][bp:7][cq:6][bn:5][cn:4][bo:3][dp:2][cp:1]
)
(;W[cm];B[cl];W[bm];B[bl];W[am]
(;B[cq];W[dn];B[cr];W[dl])
(;B[dn];W[bp];B[cq];W[bq];B[cr];W[ao]))))
(;B[cn]
BM[1]C[Wrong answer
This line is of little interest.
See the continuation]
;W[bo]
C[…White has got everything they wanted in the corner. On top of that, Black’s area on the left is open at the bottom (susoaki).]
LB[bo:2][cn:1]
))

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