In a phased tournament the games of each time slot in the two halves need NOT necessarily be identical (although this is also not forbidden). As an illustration, the following example is also a phased tournament (consider e.g. time slot s2 and time slot s7):
| s1 |
s2 |
s3 |
s4 |
s5 |
|
s6 |
s7 |
s8 |
s9 |
s10 |
| 1-2 |
2-5 |
2-4 |
2-3 |
6-2 |
| |
3-1 |
2-1 |
1-4 |
6-1 |
1-5 |
| 3-4 |
4-1 |
1-6 |
5-1 |
4-5 |
| |
5-2 |
4-3 |
2-6 |
5-4 |
3-6 |
| 5-6 |
5-6 |
5-3 |
6-4 |
1-3 |
| |
4-6 |
6-5 |
3-5 |
3-2 |
4-2 |
The more extended RobinX format also provides well-known symmetry structure such as the mirrored tournament structure where also the composition of the rounds between two legs is important, but for simplicity these structures will not be considered in the ITC2021 competition.