2. Original intention: It means that one of the opposing sides loses two games first and then wins three games back.
3. Comfort/encouragement means "Come on". For example, "hey ... we have lost two games, so let's catch up with three in the next game."
4. Tactics are tactical strategies. Deliberately lose the weakness in the first two games or let the other side relax their vigilance, and then win back in the next three games.
5. Crushing means that you are very strong and can abuse your opponent. Let the opponent win two games first, and then crush the opponent to win in the next three games.