(;GM[1]FF[4]SZ[19]
GN[Snapback]
PC[http://senseis.xmp.net/?BeginnerExercise157/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise157/Solution

Snapback]
PL[B]

AB[ho][io][jo][ko][lo][mo][gp][hp][mp][gq][mq][gr][lr][mr][gs][ls]
AW[ip][jp][kp][lp][hq][lq][hr][kr][hs][ks]
LB[jq:d][kq:b][ir:c][is:a]

;B[jr]C[B1]MN[1]
;W[js]C[W2]MN[2]
;B[iq]C[B3]MN[3]

;LB[jq:d][kq:b][ir:c][is:a]
)
