Question: what is the difference between classical rapid and blitz chess?
Answer: Rapid games are usually played with a 20 or 25 min each clock time for the whole game with probably 10 sec increment for each move. The game usually ends in an hour. Blitz games have 5 min or 3 min per each player for the game and 2–5 sec increment per move. A blitz game end within 15 minutes usually.