(;GM[1]FF[4]SZ[5:4]
GN[]
PC[http://senseis.xmp.net/?MathematicalTermForce]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?MathematicalTermForce

]
PL[W]

AB[aa][ba][ca][da][ea][bb][db][cc]
AW[eb][bc][dc][ad][bd][cd][dd][ed]

;W[ab]C[W1]MN[1]
;B[ec]C[B2]MN[2]
;W[cb]C[W3]MN[3]
;B[ac]C[B4]MN[4]

;
)
