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I built an Elo rating system for cat photos, and the matchmaking was harder than the maths

Elo — the rating system behind chess rankings — is about fifteen lines of code. I know, because I wrote those fifteen lines early one evening and then spent the next several weeks on everything around…

  • Elo rating system implemented for cat photo matchmaking in Katwars project
  • Author discovered importance of symmetric delta calculation and K-factor adjustment
  • Matchmaking strategy balanced random and strategic pairings for informative results

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