(;GM[1]FF[4]SZ[19]
GN[Problem 157 Answer. &#40657;&#20808; &#25163;&#26377;]
PC[http://senseis.xmp.net/?MaedaTsumego/Answer157]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?MaedaTsumego/Answer157

Problem 157 Answer. &#40657;&#20808; &#25163;&#26377;]
PL[B]

AB[ag][bg][cg][dg][eg][eh][di][dj][dk][bl][dl]
AW[ah][bh][ch][dh][ei][fi][cj][bk][fk][bm][cm][dm][em][fm]

;B[ci]C[B1]MN[1]
;W[bi]C[W2]MN[2]
;B[aj]C[B3]MN[3]
;W[bj]C[W4]MN[4]
;B[cl]C[B5]MN[5]
;W[al]C[W6]MN[6]
;B[ak]C[B7]MN[7]

;
)
