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

Reduction technique]
PL[W]

AB[ic][cd][ed][cj]

;W[di]C[W1]MN[1]
;B[dj]C[B2]MN[2]
;W[ei]C[W3]MN[3]
;B[bh]C[B4]MN[4]

;
)
