Go (Baduk, Weiqi) problems with solutions

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Refuting a trick play (hamete) problem 010

10 Black to play. The marked white stone creates two cutting points in Black’s shape. How should Black continue?

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[qo][qq][oo][np]
AW[pq][qm][mq][nq][pp]
;W[tt]C[10
Black to play
The marked white stone creates two cutting points in Black’s shape. How should Black continue?]
TR[pp]
(;B[po]
TE[1]C[Correct answer
Black connects with 1. When White pushes through with 2, Black can block with 3 and save the corner stone.]
;W[qp];B[rp]
(;W[qr]
C[See the variation]
;B[rq]LB[rq:5][qr:4][rp:3][qp:2][po:1]
)
(;W[rq];B[qr];W[ro];B[oq];W[pr];B[or]
C[…After 3 White can also cut with 4. Black then uses the clever combination of 5 and 7. Black 9 splits White in two.
If White plays 8 instead of 9, Black takes the point 8 themselves.]
LB[or:9][pr:8][oq:7][ro:6][qr:5][rq:4][rp:3][qp:2][po:1]
))
(;B[qp]
BM[1]C[Wrong answer
Connecting on this side would be a mistake.
See the continuation]
;W[po];B[pn];W[qn];B[pr];W[oq];B[on];W[pk]
C[…White 2 and 4 split Black in two. It will not be easy for Black to find a way out.]
LB[pk:8][on:7][oq:6][pr:5][qn:4][pn:3][po:2][qp:1]
))

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Refuting a trick play (hamete) problem 011 |>
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