(;GM[1]FF[4]SZ[19]
GN[Solution.]
PC[http://senseis.xmp.net/?CapturingRaceExercise21/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?CapturingRaceExercise21/Solution

Solution.]
PL[W]

AB[pc][od][rd][oe][re][mf][nf][qf][rf][og][qg][rg][oh][ph][oi][pi][qi][pj][ok][pk]
AW[qd][ne][pe][qe][of][pf][ng][pg][sg][nh][qh][rh][ni][ri][nj][oj][rj][nk]

;W[qc]C[W1]MN[1]
;B[qb]C[B2]MN[2]
;W[rc]C[W3]MN[3]
;B[rb]C[B4]MN[4]

;
)
