(;GM[1]FF[4]SZ[19]
GN[Position 4]
PC[http://senseis.xmp.net/?RobsonsProofThatGOIsEXPTimeHard]AP[GoWiki:2009]
DT[2014-06-20]
C[Diagram from http://senseis.xmp.net/?RobsonsProofThatGOIsEXPTimeHard

Position 4]
PL[B]

AB[fe][pe][rf][eg][ji][kk][mk][fo][ep][hp][dq][gq][cr][fr][bs][es][fs]
AW[ff][pf][qf][fg][kh][lk][kl][fp][gp][eq][fq][dr][er][cs][ds]
LB[aa:a][ka:b][la:b][ab:a][bb:a][jb:b][kb:b][bc:a][cc:a][ic:b][jc:b][cd:a][dd:a][hd:b][id:b][rd:c][sd:c][de:a][ee:a][ge:b][he:b][qe:c][re:c][ef:a][gf:b][qg:d][rg:d][rh:d][sh:d][si:d]


;LB[aa:a][ka:b][la:b][ab:a][bb:a][jb:b][kb:b][bc:a][cc:a][ic:b][jc:b][cd:a][dd:a][hd:b][id:b][rd:c][sd:c][de:a][ee:a][ge:b][he:b][qe:c][re:c][ef:a][gf:b][qg:d][rg:d][rh:d][sh:d][si:d]
)
