(;GM[1]FF[4]SZ[19]
GN[Approaching strong stones]
PC[http://senseis.xmp.net/?ThreeSpaceExtension]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ThreeSpaceExtension

Approaching strong stones]
PL[W]

AB[qb][ec][ic][qc][qd][rf]
AW[pb][pc][cd][pd][pe][pf]
CR[ic]
LB[hc:a][jc:b]

;W[gc]C[W1]MN[1]
;B[lc]C[B2]MN[2]
;W[ed]C[W3]MN[3]

;CR[ic]
LB[hc:a][jc:b]
)
