(;GM[1]FF[4]SZ[19]AP[goproblems.ru]
AB[ob][fc][ic][jd][pd][ie][je][ke][jf][lf][qf][bn][cn][qo][cp][lp][cq][pq]
AW[qc][dd][he][df][if][kf][ig][jg][kg][cl][em][do][ko][lo][dp][dq][jq]
G;W[tt]C[21
Ход черных.
]LB[jk:E][kk:B][lk:A][mk:C][pk:D]
(;B[lk]
C[A = 5
]LB[jk:E][kk:B][lk:A][mk:C][pk:D])
(;B[kk]
C[B = 4
]LB[jk:E][kk:B][lk:A][mk:C][pk:D])
(;B[mk]
C[C = 3
]LB[jk:E][kk:B][lk:A][mk:C][pk:D])
(;B[pk]
C[D = 2
]LB[jk:E][kk:B][lk:A][mk:C][pk:D])
(;B[jk]
C[E = 2
]LB[jk:E][kk:B][lk:A][mk:C][pk:D]))
