Go (Baduk, Weiqi) problems with solutions

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Direction of play and tesuji problem 007

7 Black to play Black has to find an energetic counter-attack in this variation of the two-space pincer (niken basami) joseki.

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
AB[dq][gq][cl][cp][eq]
AW[co][fo][ep][bp]
C[7
Black to play
Black has to find an energetic counter-attack in this variation of the two-space pincer (niken basami) joseki.]
LB[cp:1][ep:2][eq:3][bp:4]
(;B[cn]
TE[1]C[Correct answer
The clamp (hasamitsuke) 1 is an excellent blow at exactly the right moment. A light kikashi turns heavy stones into a shapely position in an instant.
See the continuation]
(;W[do]
C[See the variation]
;B[bn];W[bo];B[bq]
C[…After 5 White’s eye shape is poor.]
LB[bq:5][bo:4][bn:3][do:2][cn:1]
)
(;W[bo];B[en]
C[…The connection 2 is even worse, since 3 takes the point that is vital for both attack and defence.]
LB[en:3][bo:2][cn:1]
))
(;B[bq]
BM[1]C[Wrong answer
See the continuation]
;W[dp];B[cq];W[dn]
C[…The submissive 1 lets White build a magnificent shape by move 4.]
LB[dn:4][cq:3][dp:2][bq:1]
))

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