user13544: Here are the pairings for the 2017 FIDE World Cup. The above pairings are for 128-player knockouts. I can't get the way the pairings were generated. I want to be able to generate pairings using the same criteria for knockouts with different numbers of players.
Are there any FIDE published rules for single-elimination tournaments, such as the World Cup? If not, what are the criteria they use for such pairings?
As it stands, there are no knockout, single-elimination or pairing tags. I couldn't find appropriate tags, so feel free to re-tag this question.

user7297: The participants were seeded by their FIDE rating: the highest rated player (Magnus Carlsen, 2822) got #1; Wesley So, rated 2810, got #2, all the way down to Oluwafemi Balogun (2255), seed #128.
In the first round, the player with number x plays against the opponent with number 129 - x. So 1 vs. 128, 2 vs. 127, and so on.
In the second round, assuming the stronger player (with the lower number) advances, the player with number x plays against the opponent with number 65 - x. So 1 vs. 64 (this actually happened) and 9 vs. 56 (but this became 9 vs. 73 since 73 beat 56).
The 'target sum' for the third round is 33, for the fourth round 17, and so on until the final where #1 is supposed to play against #2.
This all is a standard seeding mechanism used in many sports (sometimes with slight variations); actually, in most cases, only the top n% (25% is common) of the players is seeded and the rest are paired randomly. This tournament was 'completely' seeded, which is relatively rare.

13544: <p><a href="https://en.wikipedia.org/wiki/Chess_World_Cup_2017" rel="nofollow noreferrer">Here</a> are the pairings for the 2017 FIDE World Cup. The above pairings are for 128-player knockouts. I can't get the way the pairings were generated. I want to be able to generate pairings using the same criteria for knockouts with different numbers of players.</p>

<p>Are there any FIDE published rules for single-elimination tournaments, such as the World Cup? If not, what are the criteria they use for such pairings?</p>

<p><em>As it stands, there are no <a href="/questions/tagged/knockout" class="post-tag" title="show questions tagged &#39;knockout&#39;" rel="tag">knockout</a>, <a href="/questions/tagged/single-elimination" class="post-tag" title="show questions tagged &#39;single-elimination&#39;" rel="tag">single-elimination</a> or <a href="/questions/tagged/pairing" class="post-tag" title="show questions tagged &#39;pairing&#39;" rel="tag">pairing</a> tags. I couldn't find appropriate tags, so feel free to re-tag this question.</em></p>
 7297: <p>The <a href="https://en.wikipedia.org/wiki/Chess_World_Cup_2017#Participants" rel="nofollow noreferrer">participants</a> were seeded by their FIDE rating: the highest rated player (Magnus Carlsen, 2822) got #1; Wesley So, rated 2810, got #2, all the way down to Oluwafemi Balogun (2255), seed #128.</p>

<p>In the first round, the player with number <em>x</em> plays against the opponent with number <em>129 - x</em>. So 1 vs. 128, 2 vs. 127, and so on.</p>

<p>In the second round, assuming the stronger player (with the lower number) advances, the player with number <em>x</em> plays against the opponent with number <em>65 - x</em>. So 1 vs. 64 (this actually happened) and 9 vs. 56 (but this became 9 vs. 73 since 73 beat 56).</p>

<p>The 'target sum' for the third round is 33, for the fourth round 17, and so on until the final where #1 is supposed to play against #2.</p>

<p>This all is a standard <a href="https://en.wikipedia.org/wiki/Seed_(sports)" rel="nofollow noreferrer">seeding mechanism</a> used in many sports (sometimes with slight variations); actually, in most cases, only the top n% (25% is common) of the players is seeded and the rest are paired randomly. This tournament was 'completely' seeded, which is relatively rare.</p>
