Sumo Rankings

Understanding the Skill Progression Charts

The skill progression charts now show different phases of TrueSkill convergence:

• Uncertain Period (dashed line): Periods where uncertainty (σ) > threshold, indicating the model is still learning
• Confident Period (solid line): Periods where uncertainty (σ) ≤ threshold, indicating the model has converged with uncertainty bands showing the confidence interval

The transition point is determined by when the model’s uncertainty drops below the confidence threshold, not by a fixed number of tournaments.

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