Exactly.
Today I can edit a post but directly on the post template.
I don't want that because there are elements like a banner, a right column... hidden link
You can add the edit form to page but then you will have to pass the ID of the post as URL param that you want to edit.
Where you want to add the Edit post link? Can you please share all those details and problem URL and admin access details.
*** Please make a FULL BACKUP of your database and website.***
I would also eventually need to request temporary access (WP-Admin and FTP) to your site. Preferably to a test site where the problem has been replicated if possible in order to be of better help and check if some configurations might need to be changed.
I have set the next reply to private which means only you and I have access to it.
I would like to know from where you will decide that this is the X post that you want to edit?
For that we will need to add the post edit link - where on what page/post you want to display the post edit link so when user will click on the post edit link they will be redirected on the edit-tournament page.
Do you want to add the post edit link on the single post of Chess Tournament?
With "edit-tournament" page that displays the form, I removed the form's module whiich you added and instead added the shortcode's module add added the following shortcode that displays the above content template that holds the form.
=> hidden link