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Justaminute: It shouldn't be too difficult to construct a game where black gives mate from a distance on move 20.
White moves axb3, bxc3, Na3-c4, Ba3, Qb1. Black moves axb6, Ra6-a5-a4xa3xa1. Then both make random moves on the kingside, and on move 20 Black plays Rxb1 with possible mate.
(esconder) Cansado de colocar barcos ou peças de Espionagem no início de cada jogo? Pode ir aos Editores de Jogos e gravar algumas das suas posições favoritas para uso futuro. (pauloaguia) (mostrar todas as dicas)