(;GM[1]FF[4]SZ[19]
GN[Snapback]
PC[http://senseis.xmp.net/?StrangeThingsHappenAtTheOneTwoPoint/Problem3Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?StrangeThingsHappenAtTheOneTwoPoint/Problem3Attempts

Snapback]
PL[B]

AB[bp][cp][dp][cq][eq][cr][dr][er][es]
AW[bo][co][do][ap][ep][fp][bq][fq][br][fr][cs][ds]

;B[ar]C[B1]MN[1]
;W[bs]C[W2]MN[2]
;B[aq]C[B3]MN[3]

;
)
