(;GM[1]FF[4]SZ[1]
GN[W2 at B1, B3 at B1, W4 at W2=B1]
PC[http://senseis.xmp.net/?ConstructionProblem7/Attempts]AP[GoWiki:2009]
DT[2014-05-27]
C[Diagram from http://senseis.xmp.net/?ConstructionProblem7/Attempts

W2 at B1, B3 at B1, W4 at W2=B1]
PL[B]


;B[aa]C[B1]MN[1]
;W[aa]C[W2]MN[2]
;B[aa]C[B3]MN[3]
;W[aa]C[W4]MN[4]

;
)
