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Tournament Settings
WNT*
Buchholz
Pairing System: Club Swiss System
Groups (16 or more players): Players are partitioned by rating into three groups, A (top), B and C (bottom). A and B are equal in size and have an even number of players each. C is the largest group, or equally large. Each group is then randomized separately. The BYE player, if any, is drawn at random from group C.
Round 1: Group A meets group B: the first player drawn in A plays White against the first drawn in B, and so forth. Group C is paired separately by the Swiss rules below.
Round 2: A and B are paired by score. Within a score group, A against B is preferred and B receives White, but when the groups cannot be matched evenly, equal scores are paired against each other. Group C is again paired separately. (If both pools have an odd number of players, e.g. after a withdrawal, everybody is paired in one pool.)
Round 3+: All players are paired together. Players are sorted by score, the selected tie-break (WNT or Buchholz), and initial seeding. Pairings are generated top-down.
Fewer than 16 players: The top half is randomized and paired against the randomized bottom half in Round 1. The top half always has White. Swiss pairing begins at Round 2. For an uneven bottom half, the BYE player is drawn at random.
Color Allocation: The player with fewer White games receives White. If equal, the lowest-rated player receives White (or lower-seeded if equal rating). Color balance is guaranteed (color difference can never reach 3). If color balance conflicts with the 2-in-a-row rule, up to three games in a row with the same color are permitted.
Pairings
Enter results and proceed to the next round.
Board
White (Seed / Rating)
Result
Black (Seed / Rating)
Final Standings
Current Standings
Withdraw Player
Select a player to withdraw. If the player's game is currently in progress, their opponent is awarded a win by walkover (w.o.).
Winther Score (WNT)
Winther Score (WNT) = 100 × ∑ᵢ [ (Pᵢ / N) × (rᵢ + Pᵢ / (2N)) ]
∑ᵢ = sum over all opponents faced
rᵢ = your result against opponent i (1, ½, 0)
Pᵢ = opponent i's final tournament score
N = total number of rounds in the tournament
Pᵢ / N = opponent's score share (ratio expressed as a decimal between 0 and 1)
When players finish tied on points, they are separated based on the quality of the opposition they have faced. This new method provides a fairer reflection of player performance than traditional tie-break systems, consistently rewarding those who compete on the top boards. See also: Chess pairings: a review of Monrad, Swiss, and Berger.