(;GM[1]FF[4]SZ[9]
GN[Black plays ''a'']
PC[http://senseis.xmp.net/?AtariGoProblem1/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?AtariGoProblem1/Solution

Black plays ''a'']
PL[B]

AB[ca][da][cb][db][gb][dc][ec][dd][gd][ee][ff][fg][fh][fi]
AW[ba][bb][bc][cc][hc][cd][hd][ce][de][ef][bg][eg][eh][ei]

;B[hb]C[B4]MN[4]
;W[hf]C[W5]MN[5]
;B[hg]C[B6]MN[6]
;W[ig]C[W7]MN[7]
;B[ih]C[B8]MN[8]
;W[if]C[W9]MN[9]
;B[hh]C[B10]MN[10]
;W[ic]C[W11]MN[11]

;
)
