(;GM[1]FF[4]SZ[19]
GN[Common line - forced moves]
PC[https://senseis.xmp.net/?GokyoShumyoSection1Problem100/Solution]AP[GoWiki:2009]
DT[2022-03-30]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection1Problem100/Solution

Common line - forced moves]
PL[W]

AB[gm][cn][dn][fn][co][go][gp][ip][jp][cq][kq][lq][nq][dr][fs]
AW[dm][im][ho][ep][eq][hq][iq][fr][gr][jr]
LB[en:b][cp:a]

;W[er]C[W1]MN[1]
;B[es]C[B2]MN[2]
;W[do]C[W3]MN[3]

;LB[en:b][cp:a]
)
