(;GM[1]FF[4]SZ[19]
GN[B cannot capture W3]
PC[http://senseis.xmp.net/?BeginnerExercise145/Attempts]AP[GoWiki:2009]
DT[2012-12-31]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise145/Attempts

B cannot capture W3]
PL[W]

AB[ih][jh][kh][hi][li][hj][jj][lj][hk][lk][il][jl]
AW[hg][ig][jg][kg][hh][lh][gi][ji][mi][gj][mj][gk][mk][hl][ll][im][jm][km]

;W[ii]C[W1]MN[1]
;B[ki]C[B2]MN[2]
;W[kk]C[W3]MN[3]
;B[ij]C[B4]MN[4]
;W[jk]C[W5]MN[5]

;
)
