I don’t get where i’m supposed to enter the minimal number of cards visited to allow a new thing ?
If i have a button, and if its clicked whereas all cards have not been visisted i want to display a text (with dialogizer) / and if the value is high enough another text is displayed, then go to the new unlocked card
You originally stated your goal as "all other cards have been visited".
In the model I describe above, cards whose visitation can count toward the total are each given an invisible checkbox (with a consistent name) that keeps track of whether that particular card has been visited yet. Cards that do not have such a checkbox don't count toward the total, so for example you may not need one on a "title screen" card.
If you only want to know whether some threshold has been exceeded, the query I showed for checking whether all such cards have been visited can be modified to instead count how many have been visited, and compared to some threshold (say, 10) like so:
if 10<sum extract value..value where value from deck.cards..widgets.visited # let the player go to another card... else # tell the player they can't go yet... end
If you only kept a single counter somewhere to track card visits, there would be no way to identify repeat visits to the same card, which is probably not what you have in mind.
If you used a different naming convention (call some checkboxes 'visited1', some 'visited2', etc?) and modified the queries I describe accordingly, you could track several disjoint or partially-overlapping groups of "visited" cards.
