Subgame … something you can cut off cannot cut through Information Sets Subgame perfect … in every subgame you cut off your strategy is perfect

- game is a subgame of itself
- strategy … plan for the whole game

- strg 1 from player 2 is not good
- strg 2 from player 2 is better even in the less optimal case
- strg 4 from payer 2 is interesting
- if I could destroy all cherries from existing, player 1 would be incentiviced to choose vanilla