Get ready to revolutionize how you measure skill in the American Cornhole League (ACL)! This guide introduces the Cornhole Performance Index (CPI), the most advanced metric for assessing a player's true abilities on the boards.

What is the Cornhole Performance Index (CPI)?

The CPI is the official ACL player rating scale, a dynamic single number ranging from 1 (lowest) to 12 (highest). It goes far beyond traditional skill levels by providing a comprehensive and accurate reflection of your performance.

Why is CPI the Premier Metric?

Unlike simpler metrics, CPI dives deep, meticulously analyzing several crucial factors to give you a complete picture:

• Wins and Losses: Your overall game outcomes.
• Points Per Round (PPR): Your offensive scoring efficiency.
• Defensive Points Per Round (DPR): Your ability to limit opponents' scoring.
• Strength of Schedule: The caliber of the competition you face.

By factoring in these elements, CPI offers an unparalleled and accurate assessment of your on-the-court abilities. It's more than just a new number; CPI is quickly becoming the definitive measure that will shape the competitive landscape of our sport, helping players and directors alike understand true competitive potential.

CPI is not a simple average; it's a sophisticated calculation that combines several crucial performance indicators. Here are the primary factors that contribute to your CPI:

• Average Points Per Round (PPR): This measures your offensive efficiency, indicating how many points you score on average each round. A higher PPR generally reflects better offensive skill. CPI uses a player's two (2) previous seasons data plus current season data.
• Average Difference in Points Scored Per Round (DPR): DPR assesses your consistency in outscoring your opponents. It highlights your ability to maintain a lead and score more points than the opposition over the course of a game. CPI uses a player's two (2) previous seasons data plus current season data.
• Career Weighted Win/Loss Record (Strength of Schedule): This is a significant component that adds depth to your rating. It doesn't just look at how many games you've won, but who you've won against and in what context.

Factors Influencing Your Strength of Schedule

The "Strength of Schedule" component of your CPI is particularly important and is influenced by several elements:

• Event Level: The prestige and importance of the event matter. Winning at an ACL Open or Pro event will boost your CPI more than winning at a local, smaller event.
• Event Skill Level: The designated skill tier of the event (e.g., Tier 1, Tier 2, Tier 3,Tier 4,Tier 5) also plays a role. Performing well in higher skill-level divisions will have a greater positive impact.
• Singles vs. Doubles: Singles matches are weighted more heavily in CPI calculations. This is because your individual performance is solely responsible for the outcome, whereas in doubles, your partner's performance also contributes.
• Point Differential: How you win matters. A dominant victory (e.g., winning 21-0) will positively impact your CPI more than a very close win (e.g., 21-18). This rewards consistent, high-level play throughout a game.
• Opponent's Ability: Beating a player with a high CPI will significantly improve your own CPI. Conversely, losing to a high-CPI player will have less negative impact on your rating than losing to a lower-CPI player. This ensures you are rewarded for challenging yourself against top talent.
• Partner's Ability (in Doubles): In doubles, if you win with a teammate who has a lower CPI than you, it will benefit your CPI more. If you lose with a lower-CPI teammate, it will hurt your CPI less. This encourages strategic partnership and acknowledges individual contribution within a team setting.

The primary purpose of CPI in the ACL is to serve as the official, standardized player rating scale. It provides a comprehensive and fair way to:

• Measure Skill Accurately: CPI offers a much more nuanced and complete picture of a player's skill than traditional methods.
• Facilitate Fairer Matchups: By having a robust rating system, the ACL can better categorize players and create more balanced and competitive divisions.
• Track Player Progression: Players can see their CPI evolve over time, offering a clear indication of their improvement and standing within the league.
• Enhance Competitive Structure: CPI helps establish a data-driven framework for seeding, promotions, and overall competitive organization within the ACL.

By understanding CPI, both players and directors can gain valuable insights into performance, strategize for improvement, and contribute to the continued growth and fairness of competitive cornhole. The more data collected the more accurate and effective the CPI becomes in creating truly balanced and competitive divisions.

To effectively categorize players and foster fair competition, the ACL utilizes CPI to define distinct skill tiers. These tiers provide a clear framework for players to understand their standing and for directors to organize events. It's important to note that while National Tiers maintain a consistent standard, State and Regional Tiers offer flexibility to accommodate varying player bases.

What to Do If You Don't Have a CPI 

If you're a new player or do not have an official ACL CPI yet, don't worry! You can still find the right tier for competition. Use the following guidelines to determine where you should start:

• Use Your Points Per Round (PPR) as a Guide: If you have a recent average PPR from other events, you can use it to gauge your skill level. It's common for a player's official CPI to be slightly lower than their average PPR, so keep that in mind when choosing a tier.
• Brand-New Player? If you are completely new to competitive cornhole, you can expect to fit into a lower CPI tier. A good starting point would be a division with a max CPI of around 5.0.
• Players with Local Experience: If you have some experience playing in local events, you may be better suited for a higher tier. You could expect to be competitive in a division with a max CPI of 5.0-7.0.
• Your Club/Regional Director: Directors have access to advanced stats and other metrics to help research and guide you towards a Tier level. 

By using these pointers, you can confidently register for a division that will provide you with fun and balanced competition.

Your Cornhole Performance Index (CPI) is a powerful tool that helps you find the right competition for your skill level. When registering for an event, use your current CPI to determine which division based on the minimum or the maximum CPI set for each division.

For Singles Events

When you register for a singles tournament, your individual CPI must be at or below the maximum CPI for the tier you're entering.

• Playing in Your Tier: You can choose to play in any tier where your CPI is equal to or less than the maximum CPI listed. For example, if a Tier 2 has a max CPI of 7.50, and your CPI is 6.48, you are eligible to register for that tier.
• Playing Up: Depending on the director, you may have the ability to "play up" into any higher tier. If your CPI qualifies you for Tier 3, you can choose to compete in a Tier 2 or even a Tier 1 event. This is a great way to challenge yourself against stronger players and test your skills.
• No Playing Down: To maintain fair competition, players are not allowed to "play down" into a lower tier than their CPI officially qualifies them for. Players will receive an error message if you attempt to  register for a tier where their  CPI is higher than the maximum CPI for that division. For example, a player with a CPI of 6.48 cannot register for a Tier 4 event if their CPI is listed as a 6.25  maximum.

For Doubles Events

Doubles events follow a similar principle, but the CPI of both players on the team must be considered.

• Team Eligibility: For a doubles team to register, both players' individual CPIs must be at or below the maximum CPI for that tier. For example, if a Tier 2 doubles event has a max CPI of 7.75, both you and your teammate must have a CPI of 7.75 or lower to be eligible.
• Playing Up as a Team: A doubles team may have the option to play up into any higher tier. If both partners' CPIs qualify them for Tier 3, they could choose to register for a Tier 2 or Tier 1 doubles event, as long as both of their CPIs are below the max for the chosen higher tier.
• No Playing Down as a Team: Neither player on a doubles team can have a CPI that exceeds the maximum CPI of a lower tier they are trying to play in. Players will receive an error message if they attempt to register for a tier where one of the teammate’s  CPIs exceeds the  tier's maximum. This rule prevents a stronger player from joining a lower-division team to gain an unfair advantage.

For Blind Draw Events

Blind draw events are a great way to mix up competition and play with new partners. To help balance the teams, directors will commonly set both a minimum and a maximum CPI for each blind draw tier.

• Registration Rules: To register for a specific blind draw tier, your individual CPI must fall within the range provided by the director. For example, if a blind draw tier is designated for players with a CPI between 5.25 and 6.25, you must have a CPI within that exact range to be eligible to register.
• Why It Works: This system ensures that the randomized teams are formed from players with a similar skill level. By grouping players into specific CPI ranges, directors can create more competitive blind draw brackets where the outcome of the draw doesn't drastically favor one team over another.