Seki Example 1
From a high dan game at KGS, see http://files.gokgs.com/games/2003/3/20/lesio-MIYAUSIRO.sgf
Karl Knechtel: I'd consider this to be two linked seki, really, for the reason that a fill inside by one player does not suicide all of that player's strings in question. But maybe I'm just weird :)
Robert Pauli: Three seki(s).
Tas: No, not by Karl's conditions. Since suicide of any of the white circled groups will cause the black squared to live, killing the white squared.