(;GM[1]FF[4]SZ[19]
GN[Variation at B4]
PC[https://senseis.xmp.net/?GokyoShumyoSection1Problem54/Solution]AP[GoWiki:2009]
DT[2023-01-15]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection1Problem54/Solution

Variation at B4]
PL[W]

AB[cl][cn][dn][fo][go][ip][dq][eq][iq][br][cr][fr][gr][ir][hs]
AW[cp][dp][ep][fp][bq][cq][fq][gq][hq][ar][hr]

;W[dr]C[W1]MN[1]
;B[er]C[B2]MN[2]
;W[ds]C[W3]MN[3]
;B[bs]C[B4]MN[4]
;W[gs]C[W5]MN[5]
;B[fs]C[B6]MN[6]
;W[bo]C[W7]MN[7]

;
)
