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revert: restore world-ranking-based seeding for darts bracket

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Seeding should follow the PDC Order of Merit (world ranking), not Elo.
Reverts the previous Elo-seeding commit.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Chris Parsons 2026-04-09 04:27:10 +00:00
parent 2387173cf5
commit 715f61d1c7
1 changed files with 12 additions and 9 deletions
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21
app/services/simulations/darts-simulator.ts
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@ -29,7 +29,7 @@
* Final: best-of-13 sets, first to 7
*
* Seeding (pre-bracket path):
* Top 32 players (by Elo, descending) are seeded into fixed bracket positions
* Top 32 players (by world ranking) are seeded into fixed bracket positions
* using the standard balanced bracket structure:
* R1 seeds: 1v32, 16v17, 9v24, 8v25 (top half) + 5v28, 12v21, 13v20, 4v29
* 3v30, 14v19, 11v22, 6v27 (bottom half) + 7v26, 10v23, 15v18, 2v31
@ -468,14 +468,17 @@ export class DartsSimulator implements Simulator {
// the seeded tour players.
const fallbackElo = 1400;
// Seed by Elo descending — the top 32 strongest players (by Elo) get protected
// bracket positions. World ranking (PDC Order of Merit) is prize-money-based and
// can diverge from current skill; a player ranked 35th by earnings might have a
// higher Elo than someone ranked 28th. Using Elo for seeding keeps the bracket
// consistent with the Elo-based match simulation.
const sorted = [...allParticipants].toSorted((a, b) =>
(eloMap.get(b.id) ?? fallbackElo) - (eloMap.get(a.id) ?? fallbackElo)
);
// Sort participants by world ranking (ascending). Fall back to Elo order (descending) for
// any without a ranking, then alphabetical as a final tiebreak.
const sorted = [...allParticipants].toSorted((a, b) => {
const rankA = rankingMap.get(a.id);
const rankB = rankingMap.get(b.id);
if (rankA !== undefined && rankB !== undefined) return rankA - rankB;
if (rankA !== undefined) return -1; // ranked before unranked
if (rankB !== undefined) return 1;
// Both unranked — sort by Elo descending
return (eloMap.get(b.id) ?? fallbackElo) - (eloMap.get(a.id) ?? fallbackElo);
});
const topSeeds = sorted.slice(0, TOP_SEEDS).map((p) => p.id); // seeds 1–32
const unseeded = sorted.slice(TOP_SEEDS).map((p) => p.id); // remaining players