(1) debian-installer/locale=en_US console-keymaps-at/keymap=us keyboard-configuration/xkb-keymap=us netcfg/choose_interface=auto netcfg/get_hostname=deb netcfg/get_domain=local hw-detect/load_firmware=true preseed/early_command="anna-install network-console"
that is for no preseed[.]cfg and over ssh debian install. boot via kernel netboot/debian-installer/amd64/linux and initrd[.]gz. hostname can be deb[.]debian[.]org or your fav mirror.