Go (Baduk, Weiqi) problems with solutions

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Refuting a trick play (hamete) problem 079

79 Black to play. White played the marked move hoping to surprise the opponent. The attempt should not go unpunished.

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(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
AB[np]
AW[qp][nq]
;W[tt]C[79
Black to play
White played the marked move hoping to surprise the opponent. The attempt should not go unpunished.]
TR[nq]
(;B[oq]
TE[1]C[Correct answer
Black splits the white stones firmly with 1.
See the continuation]
;W[op];B[pp];W[oo];B[pq]
(;W[po]
C[See the variation]
;B[mq];W[nr];B[mr]
C[…Black saves the weak stone with 5; this is Black’s best continuation. After 9 the result is very good for Black.]
LB[mr:9][nr:8][mq:7][po:6][pq:5][oo:4][pp:3][op:2][oq:1]
)
(;W[mp];B[po];W[no];B[pn]
C[…If White captures the stone, White loses the corner, and that is a big loss.]
LB[pn:9][no:8][po:7][mp:6][pq:5][oo:4][pp:3][op:2][oq:1]
))
(;B[mq]
BM[1]C[Wrong answer
Black should not play the timid 1.
See the continuation]
;W[oq];B[mp];W[jp]
C[…White connects at 2 and takes a big corner. On top of that, Black gets nothing on the lower side.]
LB[jp:4][mp:3][oq:2][mq:1]
))

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