PR

How it works in play

PR is your average equity error per decision, multiplied by 500, as judged by an analyzer such as GNU Backgammon or XG. Lower is better, and under 2 is world class. Boardgammon shows your PR after each game, with checker play and cube decisions graded separately.

Related terms

• Equity — The expected value of a position, typically expressed in cube units or points.
• EMG — "Equivalent to money game" — the normalized unit for expressing match-play equity.
• XG — eXtreme Gammon — the leading commercial backgammon analyzer.
• Rollout — A computer simulation playing thousands of games from a position to estimate its equity.
• Cubeful / cubeless equity — A position’s expected value with and without future cube actions accounted for.

Go deeper

• What PR measures
• The PR scale, from beginner to world class
• Why Boardgammon: dice you can check, analysis you don’t pay for
• Backgammon strategy, from first roll to bear-off

In other languages

• العربيةتقييم الأداء (PR)
• ΕλληνικάPR
• فارسیPR
• עבריתPR
• РусскийPR
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