(;GM[1]FF[4]SZ[19]
GN[If white captures, B3 is atari...]
PC[http://senseis.xmp.net/?RoundRobinKo]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RoundRobinKo

If white captures, B3 is atari...]
PL[B]

AB[ma][qa][sa][mb][qb][sb][mc][nc][rc][sc][nd][od][pd][rd][pe][qe][re]
AW[la][na][pa][lb][nb][pb][lc][oc][pc][qc][ld][md][sd][me][ne][oe][se][of][pf][qf][rf][sf]

;B[ob]C[B1]MN[1]
;W[oa]C[W2]MN[2]
;B[qd]C[B3]MN[3]

;
)
