(;GM[1]FF[4]SZ[19]
GN[1a - Follow-up]
PC[http://senseis.xmp.net/?PracticalEndgameTest2/BookSolutionBlack]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?PracticalEndgameTest2/BookSolutionBlack

1a - Follow-up]
PL[B]

AB[pb][qb][rb][sb][qc][pd][pe]
AW[pc][rc][qd][rd][qe][pf]
CR[sb]
LB[qf:a]

;B[sd]C[B1]MN[1]
;W[se]C[W2]MN[2]
;B[sc]C[B3]MN[3]
;W[rf]C[W4]MN[4]

;CR[sb]
LB[qf:a]
)
