We've made a change to how Swiss tiebreakers work. For any tournament beginning after today, Buchholz is the primary tiebreaker.

Buchholz (BH) can be considered as the sum of all opponents tournament points. There are some intricacies surrounding byes and withdrawals, for which we have kept inline with the FIDE Handbook. No scores are dropped from the Buchholz calculation.

Sonneborn-Berger (SB) was the previous tiebreaker for Swiss tournaments, and this is now the secondary tiebreaker. You can find both tiebreak scores in a Swiss for yourself by clicking on a player's name in the standings and looking at 'Tiebreak [BH]' and 'Tiebreak [SB]'.

All historic tournaments are unchanged and continue to use Sonneborn-Berger.

One other change is that late entries to a Swiss tournament used to receive 1/2 a point for the first round, if they missed the opening round. Moving forward, players will no longer receive 1/2 a point for missing the first round of a Swiss tournament.

These changes will affect all MSO tournaments which start tomorrow!

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