Range Asymmetry View

What Is Range Asymmetry?

Range asymmetry refers to the fundamental differences between two players' possible hand distributions in a poker hand. When one player's range contains hands that the other player cannot have — such as strong pocket pairs or specific suited connectors — it creates an asymmetry that profoundly influences optimal strategy.

Understanding range asymmetry is a cornerstone of GTO (Game Theory Optimal) poker. It determines who has the "range advantage" on a given board texture and, consequently, who should bet more aggressively or defend more passively.

How to Use This Tool

Enter two poker hand ranges using standard notation or select from the preset dropdown menus. The 13×13 grid instantly updates to show which hands are unique to each range and which are shared. Use this to study:

• Range advantage: Which player has more premium combinations?
• Unique holdings: Which hands can only one player have? These often become ideal bluff or value candidates.
• Overlap analysis: How much do the ranges intersect? High overlap means similar strategies; low overlap means more polarized play.

Range Notation Guide

• Individual hands: AKs (suited), AKo (offsuit), AK (both)
• Plus notation: QQ+ means QQ, KK, AA. ATs+ means ATs, AJs, AQs, AKs.
• Dash notation: 77-JJ means all pairs from 77 to JJ. A2s-A5s means A2s through A5s.
• Combine freely: JJ+, ATs+, KQs, 87s-65s, AQo+
• Solver format: Paste directly from PioSOLVER or other solvers. The combo format (Ac7d: 1, KhKs: 0.5) is automatically detected.

Why Range Asymmetry Matters

Consider a CO vs BTN battle. The CO opens a tighter range while the BTN defends wider. On a board like A-K-7 rainbow, the CO has a significant range advantage because their opening range is weighted heavily toward strong Ax and Kx hands. The BTN, with many small pairs and suited connectors, has fewer nutted combinations on this texture.

Conversely, on a board like 7-6-5 with two clubs, the BTN's wider range containing many suited connectors and small pairs gives them the range advantage. The CO's tight opening range largely misses this board texture.

This tool helps you visualize these differences before you sit down at the table, so you can develop board-specific strategies based on who actually has the range advantage.