(;GM[1]FF[4]SZ[19]
GN[Wall collapsing]
PC[https://senseis.xmp.net/?GokyoSeimyoVolume3Problem46/Solution]AP[GoWiki:2009]
DT[2023-02-16]
C[Diagram from https://senseis.xmp.net/?GokyoSeimyoVolume3Problem46/Solution

Wall collapsing]
PL[W]

AB[eo][fo][go][dp][hp][dq][gq][hq][lq][oq][br][cr][dr][fr][ir][jr][lr][ks]
AW[cn][en][fn][gn][do][ho][io][cp][ep][ip][bq][cq][eq][iq][jq][kq][er][kr]
LB[fp:a][is:b]

;W[gr]C[W1]MN[1]
;B[fq]C[B2]MN[2]
;W[hr]C[W3]MN[3]

;LB[fp:a][is:b]
)
