Popeye is a chess problem solving and testing software with strong support for fairy chess and heterodox genres. For more information cf. topic "Popeye (chess)" on http://en.wikipedia.org/
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Circe Equipollents: pawns can move from their side's base rank #491
Up to 4.65, Popeye didn't allow a pawn to move from its side's base rank in Circe Equipollents (as opposed to, e.g., Einstein Chess, which allows single, double and even triple steps from that rank).
Up to 4.65, Popeye didn't allow a pawn to move from its side's base rank in Circe Equipollents (as opposed to, e.g., Einstein Chess, which allows single, double and even triple steps from that rank).
Since 4.67, single steps are allowed.