(;GM[1]FF[4]SZ[19]
GN[Block/Extend]
PC[https://senseis.xmp.net/?4463Enclosure/Diagrams]AP[GoWiki:2009]
DT[2023-03-16]
C[Diagram from https://senseis.xmp.net/?4463Enclosure/Diagrams

Block/Extend]
PL[W]

AB[fc][dd]
LB[ch:b][ci:a]

;W[be]C[W1]MN[1]
;B[bd]C[B2]MN[2]
;W[ce]C[W3]MN[3]
;B[cd]C[B4]MN[4]

;LB[ch:b][ci:a]
)
