Improve GreedyAgent #139
Description
- Try to prevent the opponent from jumping over us, at least in a simple case where they both start going forward
- Find which one is the best place to put a wall rather than the first one
- May choose to block even if its winning, when blocking would provide a significant advantage.
- Add some randomness, e.g. when to block or advance, or which of the optimal places to put a wall is used