(;GM[1]FF[4]SZ[11]
GN[Bill's problem. White first.]
PC[http://senseis.xmp.net/?HolIgorSolveYose1]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?HolIgorSolveYose1

Bill's problem. White first.]
PL[W]

AB[fc][gc][hc][ic][id][fe][ge][ie][ef][ff][hf][jf][hg][gh][hh][ih][jh][kh][fi][gi][ii][ki][gj][hj][hk][ik]
AW[cc][dc][ec][cd][ed][ce][ee][cf][cg][fg][gg][ch][dh][eh][fh][ci][ji][dj][ej][fj][ij][kj][fk][gk][jk]
CR[ia][ja][ka][hb][ib][jb][kb][jc][kc][jd][kd][je][ke][if][kf][ig][jg][kg][hi][ji][ij][jj][kj][jk][kk]
SQ[aa][ba][ca][da][ab][bb][cb][db][ac][bc][ad][bd][ae][be][af][bf][ag][bg][ah][bh][ai][bi][aj][bj][cj][ak][bk][ck][dk][ek]

;W[fb]C[W1]MN[1]
;B[gb]C[B2]MN[2]
;W[ea]C[W3]MN[3]
;B[fd]C[B4]MN[4]
;W[df]C[W5]MN[5]
;B[ga]C[B6]MN[6]
;W[fa]C[W7]MN[7]
;B[eg]C[B8]MN[8]
;W[ei]C[W9]MN[9]

;CR[ia][ja][ka][hb][ib][jb][kb][jc][kc][jd][kd][je][ke][if][kf][ig][jg][kg][hi][ji][ij][jj][kj][jk][kk]
SQ[aa][ba][ca][da][ab][bb][cb][db][ac][bc][ad][bd][ae][be][af][bf][ag][bg][ah][bh][ai][bi][aj][bj][cj][ak][bk][ck][dk][ek]
)
