SQUARE_EP_DUAL    154 src/fen.cpp          pawn = SQUARE_EP_DUAL(sq);
SQUARE_EP_DUAL    149 src/move_do.cpp    if (MOVE_IS_EN_PASSANT(move)) sq = SQUARE_EP_DUAL(sq);
SQUARE_EP_DUAL    227 src/move_evasion.cpp     && to == SQUARE_EP_DUAL(board->ep_square)) {
SQUARE_EP_DUAL    118 src/see.cpp          ASSERT(PIECE_IS_PAWN(board->square[SQUARE_EP_DUAL(to)]));
SQUARE_EP_DUAL    120 src/see.cpp          alists_hidden(alists,board,SQUARE_EP_DUAL(to),to);