Kepler & K2 provide long-baseline, high-precision photometry for exoplanet and astrophysics research.
The basic and most common additional rule for Doubles play is that where a Double exists at the end of any train, the Double must then be 'satisfied' (laid against) in the next turn, even if the Double is on another player's train that is not marked.
The match consists of 2 out of 3 sets or games OR 3 out of 5 sets or games. If the match goes to the deciding set or game, it is played to 15 points for all rules groups. I know it is confusing. You play games in the fall with your school team and then play sets with your club team in the spring. They are the same thing, just different rules call them different things.