Go (Baduk, Weiqi) problems with solutions

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Refuting a trick play (hamete) problem 023

23 Black to play The marked stone looks strange, but Black must stay alert and watch out for a trap.

If the variation letters A, B and C are not shown on the board, reload the page or press "next move".

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
AB[oq][pp]
AW[qp][pn][kq]
;W[tt]C[23
Black to play
The marked stone looks strange, but Black must stay alert and watch out for a trap.]
TR[pn]
(;B[qq]
TE[1]C[Correct move
Black answers at 1.
See the continuation]
(;W[qo]
C[See the variation]
;B[rq]
C[…If White answers 2, Black settles securely in the corner with 3. This result is good for Black.]
LB[rq:3][qo:2][qq:1]
)
(;W[po];B[rp];W[qo];B[np]
C[…If White answers 2, Black continues with 3 and 5. White cannot shut Black into the corner.]
LB[np:5][qo:4][rp:3][po:2][qq:1]
))
(;B[qo]
BM[1]C[Wrong answer
Black 1 is too greedy.
See the continuation]
;W[po];B[qq];W[rp];B[ro];W[op];B[pq];W[rn]
C[…Although Black captures two stones with 3 and 5, White squeezes with 6 and 8 and gets good influence.]
LB[rn:8][pq:7][op:6][ro:5][rp:4][qq:3][po:2][qo:1]
))

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