(;GM[1]FF[4]SZ[19]
GN[Osae]
PC[http://senseis.xmp.net/?DrivingTesujiProblem1/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?DrivingTesujiProblem1/Solution

Osae]
PL[B]

AB[dc][ec][gc][cd][fd][gd][id][ge]
AW[fc][hc][ed][hd][fe][he][gf]

;B[gb]C[B1]MN[1]
;W[hb]C[W2]MN[2]
;B[fb]C[B3]MN[3]
;W[hf]C[W4]MN[4]

;
)
