You cannot afford to fold frequently in the big blind. Depending on the opponent's raise size, you should defend between 55% and almost 100% of hands to prevent being exploited by constant steals. Theoretical Frameworks How I Play Heads Up No Limit Hold'em

Because there is only one opponent, traditional hand values shift. You must be willing to play a much wider range of hands, often opening roughly 80-90% from the button (small blind).

The button is the most powerful tool in HUNL. You act last on every post-flop street, allowing you to control the pot size and put maximum pressure on the big blind.

Expert Heads Up No Limit Hold'em (HUNL) is a poker format that requires deep theoretical analysis, as every hand involves the highest possible frequency of decision-making . Unlike full-ring or 6-max games, HUNL is defined by extremely wide ranges and constant aggression, making mastery of game theory and exploitative adjustments essential. Strategic Foundations