grenv: www.buho21.com is a spanish site which has live dark chess (they call it blind chess), i never really play it so I'm not sure what it does about the en passant rule or what sort of level the players there are. It also has atomic (with slightly different rules) and losers
(esconder) Se está interessado no progresso de um torneio em que participa, pode discuti-lo com os seus adversários no fórum desse torneio. (HelenaTanein) (mostrar todas as dicas)