(;GM[1]FF[4]SZ[19]
GN[Playing the ko (i)]
PC[http://senseis.xmp.net/?QuadrupleKoSeki]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?QuadrupleKoSeki

Playing the ko (i)]
PL[B]

AB[ga][ka][gb][jb][kb][gc][kc][gd][jd][kd][ge][ie][ke][gf][jf][kf][gg][ig][kg][gh][jh][kh][gi][hi][ii]
AW[ha][ja][la][hb][ib][lb][hc][jc][lc][hd][id][ld][he][le][hf][if][lf][hg][lg][hh][ih][lh][ji][ki][li]

;B[ia]C[B1]MN[1]
;W[je]C[W2]MN[2]
;B[ic]C[B3]MN[3]
;W[jg]C[W4]MN[4]

;
)
