(;GM[1]FF[4]SZ[19]
GN[Maintaining two split groups]
PC[http://senseis.xmp.net/?12PointFunProblem/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?12PointFunProblem/Attempts

Maintaining two split groups]
PL[W]

AB[db][bc][cc]
AW[ab][bb][cb]

;W[dc]C[W1]MN[1]
;B[dd]C[B2]MN[2]
;W[ec]C[W3]MN[3]
;B[eb]C[B4]MN[4]

;
)
