Jekyll Github pages how to hide a post

I am using jekyll with Github pages for my website.I am trying to make some posts not visible in the home but they can be linked from another post.In the frontmatter I tryed to add a field visible like this:

---layout: posttitle: excerpt: visible:1---

And then in the index.html file I did a if check:

<div class="posts">  {% for post in paginator.posts %}  {% if post.visible== 1  %}<div class="post"><h1><a href="{{ post.url }}">        {{ post.title }}</a></h1><span class="post-date">{{ post.date | date_to_string }}</span><a class="subtitle" href="{{ post.url }}">           {{ post.excerpt }}</a></a></div>  {% endif %}  {% endfor %}</div>

The idea is that when I set 0 in the visible field, the post won't be visible in the home. Unfortanely this is not working, do you have any hints? Thanks