Probably two, my best one was at the very end of a game and I was able to place the remaing 7 letters I had in the top right corner and down and because there were no tiles left it was the end of the game after that! BONUS!
Not Enough! My husband usually beats me but our highest games get into the 400 range. We are both very competitive and don't use a time limit so our games can get pretty L O N G It is great mental gymnastics!