How to implement search query to filter on search key is equal to title?

Question

I have changed the search query from the search page. I would like to filter on ContentType X. This is working. I have created a new result source which is get only items from ContentType X. Now I would like to add an extra filter that the search key needs to be equal to the Title column of each items. I have now something like this but it dont work. What do I forget?

Title: {SearchBoxQuery}

Answer 1

The solution is Title={SearchBoxQuery}