Go (Baduk, Weiqi) problems with solutions

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Play the endgame (yose) correctly 042

Black to play. Black plays first and wins.

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[9]
ST[2]
AB[ab][bb][ad][be][ce][cd][cc][db][eb][fb][gb][ga][ha][hc][dh]
[eh][ei][fi][eg][ef][ee][fe][de][fd][gf]
AW[bd][hb][ib][ic][gc][gd][ge][he][fc][ff][fg][fh][gi][hh][ae]
[af][bf][cf][df][dg][dd][ed][ch][ah][di]
C[Black plays first and wins.]
;B[hg];W[hf];B[ih];W[gg];B[hi];W[ig];B[gh];W[ii]
;B[bi];W[bh];B[ci];W[bg];B[gi]
(;W[ih];B[ec];W[ac]
C[Black 13, White 12.]
)
(;W[ec]
C[White’s mistake!]
;B[ih];W[hg];B[bc];W[ii];B[id];W[hd];B[ih];W[ai]
;B[di];W[ii];B[ia];W[ie];B[ih]
C[Black 12, White 10.]
))

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