(;GM[1]FF[4]SZ[19]
GN[snapback]
PC[http://senseis.xmp.net/?BeginnerExercise201/Attempts]AP[GoWiki:2009]
DT[2014-07-28]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise201/Attempts

snapback]
PL[B]

AB[ch][dh][eh][bi][ci][bj][cj][ak][bk][dk][fk][dl][dm][cn]
AW[bg][cg][dg][eg][fg][bh][fh][ai][di][ei][fi][aj][dj][ck][cl][bm]

;B[bn]C[B1]MN[1]
;W[ah]C[W2]MN[2]
;B[am]C[B3]MN[3]
;W[al]C[W4]MN[4]

;
)
