(;GM[1]FF[4]SZ[19]
GN[Block]
PC[http://senseis.xmp.net/?posting=10009]AP[GoWiki:2009]
DT[2014-03-21]
C[Diagram from http://senseis.xmp.net/?posting=10009

Block]
PL[W]

AB[dd][fd][fe][cj]
AW[fc][gd]

;W[cc]C[W1]MN[1]
;B[cd]C[B2]MN[2]
;W[dc]C[W3]MN[3]
;B[gc]C[B4]MN[4]

;
)
