(;GM[1]FF[4]SZ[19]
GN[B1 is the key move...]
PC[http://senseis.xmp.net/?CapturingRaceExercise13/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?CapturingRaceExercise13/Solution

B1 is the key move...]
PL[B]

AB[pa][qb][oc][qc][rc][sc][od][pd][of][pf][rf][qg]
AW[nb][ob][pb][mc][pc][qd][rd][sd][qe]
CR[pa]

;B[sb]C[B1]MN[1]
;W[ra]C[W2]MN[2]
;B[qf]C[B3]MN[3]
;W[qa]C[W4]MN[4]
;B[pe]C[B5]MN[5]
;W[oa]C[W6]MN[6]
;B[se]C[B7]MN[7]

;CR[pa]
)
