Go (Baduk, Weiqi) problems with solutions

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Direction of play problem 078

78 White to play Choose from options A–B * White occupies the lower left corner

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(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
ST[2]
AB[qd][nc][cd][hd][dd][ee]
AW[qq][dp][ed][ce][de]
;W[tt]C[78
White to play
Choose from options A–B
* White occupies the lower left corner]
PL[W]LB[bd:B][fd:A]
(;W[fd]
BM[1]C[Wrong answer
Hane hinders development of the left side
See the continuation]
;B[be];W[bf];B[bd];W[ef];B[cf];W[fe];B[cg]
C[…If the shicho works for White, 1 is playable in theory. Even so, the result after 8 fails to make full use of the hoshi stone in the lower left corner. White has in effect taken away their own development on the left side. Besides, the stone /\\ is backed up by the low, strong stone [ \].]
LB[cg:8][fe:7][cf:6][ef:5][bd:4][bf:3][be:2][fd:1]
TR[hd]
SQ[nc]
)
(;W[bd]
TE[1]C[Correct answer
Hane develops the left side
See the continuation]
;B[bc];W[be];B[ec];W[fd]
C[…White 1 is correct. After 5 Black plays A or B (see problems 79-80). Either way White develops the left side. Here the left side is more important than the top, because the stone /\\ is high while the stone [ \] is low.]
LB[fd:5][ec:4][be:3][bc:2][bd:1][fe:B][fc:A]
TR[dp]
SQ[nc]
))

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