user5691: Which tie break system would be used in Tata Steel 2015?
I didn't find it on the tournament website. I don't know how to get it.

user8472: Not sure if this question is still relevant … :)
I have looked up this information on chess24.com's broadcast page for that event. They are usually in direct contact to the organizers and their Information tab is relatively reliable. 
According to that page the tiebreak rules were as follows:

Points scored
Direct encounter
Sonneborn-Berger
Most games played with Black
Rating

Keep in mind this is from a secondary source. If you want to be sure, ask the organizers. 

5691: <p>Which tie break system would be used in Tata Steel 2015?</p>

<p>I didn't find it on the tournament website. I don't know how to get it.</p>
 8472: <p>Not sure if this question is still relevant … :)</p>

<p>I have looked up this information on <a href="https://chess24.com/en/watch/live-tournaments/tataSteelMasters2015/13/1/1" rel="nofollow noreferrer">chess24.com's broadcast page</a> for that event. They are usually in direct contact to the organizers and their <em>Information</em> tab is relatively reliable. </p>

<p>According to that page the tiebreak rules were as follows:</p>

<ol>
<li>Points scored</li>
<li>Direct encounter</li>
<li><a href="https://en.wikipedia.org/wiki/Sonneborn%E2%80%93Berger_score" rel="nofollow noreferrer">Sonneborn-Berger</a></li>
<li>Most games played with Black</li>
<li>Rating</li>
</ol>

<p>Keep in mind this is from a secondary source. If you want to be sure, ask the organizers. </p>
