(;GM[1]FF[4]SZ[4:2]
GN[Variation 1]
PC[http://senseis.xmp.net/?MathematicalTermForce]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?MathematicalTermForce

Variation 1]
PL[B]

AB[ab][bb][cb][db]

;B[ba]C[B1]MN[1]
;B[ca]C[B3]MN[3]

;
)
