/c
script.on_event(defines.events.on_gui_opened,function(event)
local player = game.players[event.player_index]
if player.opened_gui_type == defines.gui_type.blueprint_library then
player.opened = nil
end
if player.clean_cursor() then
player.cursor_stack.set_stack'blueprint'
end
end)

The ...

Thanks all for the answers !
Did that code work for all in multiplayer ? can i made a mod with that code who block blueprints for all ?
And how this code work, do i have to copy/pasy it where we talk in the game ? thanks

i think you don't understand me, robots aren't a problem, auto-build with robots and copy/past existing setup already on the map is cool but...
What i don't like is be in a game, mine or not, and thinking of how resolve a problem and someone arrive and past a big blueprint who is "optimised". Do you ...

Hi people !
what about a "no blueprint" in map generator options ? Blueprints are cool but people usually use other's blueprints even if they don't understand them, onestly that's a pain sometimes.
A no blueprint challenge seems cool ! Thank for all your work !