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Handbook | C. General Rules and Recommendations for Tournaments | 04. FIDE Swiss Rules | 04.1. Swiss System Based on Rating | D. Transposition and Exchange Procedures

D. Transposition and Exchange Procedures


Example: S1 contains players 1, 2, 3 and 4 (in this sequence); S2 contains players 5, 6, 7 and 8 (in this sequence).


Transpositions within S2 should start with the lowest players, with descending priority:

  1. 5-6-8-7;
  2. 5-7-6-8;
  3. 5-7-8-6;
  4. 5-8-6-7;
  5. 5-8-7-6;
  6. 6-5-7-8;
  7. 6-5-8-7, etc.

Hint: put all numbers constructable with the digits 5, 6, 7 and 8 in ascending order.


When applying an exchange between S1 and S2 the difference between the numbers exchanged should be as small as possible. When differences of various options are equal take the one concerning the lowest player of S1.
Exchange one player
  Exchange two players
  4 3 2 S2   3+4 2+4 2+3
5 a c f 5+6 j l o
6 b e h 5+7 k n q
7 d g i 6+7 m p r

The above matrices contain the sequence in which exchanges should be applied.
Exchanging one player: a) 4 and 5; b) 4 and 6; c) 3 and 5; etc. until i) 2 and 7.
Exchanging two players: j) 3+4 with 5+6; k) 3+4 with 5+7; l) 2+4 with 5+6 etc. After each exchange both S1 and S2 should be ordered according to A2.
Remark: if the number of players in a score bracket is odd, S1 contains one player less than S2. So with 7 players S1 contains players 1, 2 and 3, S2 4, 5, 6 and 7. The exchanges needed in that case can be found from the above ones by deducting all numbers in S1 and S2 by 1. The last column of the second matrix has then become obsolete.

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