0 LEVEL OF THINKING - when players are only thinking about their cards. They don't think about what cards the opponent has. And they don't think about what the opponent is thinking.
THINKING LEVEL 1 - when the player thinks about what cards the opponent has. And thinks what the opponent thinks.
LEVEL 2 THINKING - what does my opponent think, what cards do I have ?
THINKING LEVEL 3 - what my opponent is thinking, so that I can think about what cards he has.
Always know what level your opponent is thinking at and think one level above. If you think one step below, you lose. If you think more than one step higher, you will also not communicate with your opponent and you may lose 🙂 .
We highly recommend everyone to watch a cool, free video by poker coach "Brilliant" on the psychology of poker
