Yeah, so he's using heads-up hand strengths. So how well QQ fares vs all other hands, for instance, but only one hand at a time. (It's not QQ in a pot with 9 ot

Yeah, so he's using heads-up hand strengths. So how well QQ fares vs all other hands, for instance, but only one hand at a time. (It's not QQ in a pot with 9 other hands.) Then he computing weighted hand strengths based on frequency of opponents playing a hand. So now QQ doesn't win as often, given that the opponent doesn't play 27o very often so you don't actually get to win hands vs 27o (they don't occur). BUT to determine how often an opponent plays a given hand, he's using the IRC poker database, which is full-table hands. So we see that people play K7 infrequently, for instance, which is true at a full ring game. But in a heads-up match, K7 is played very, very frequently. 85%+ I'd say, but easily 75%. [1] [1] I played heads-up poker professionally for a few years. I logged millions of hands.