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.
Card game rules: Frustration. The Rules of the Card Game Frustration - Version 1.1, 2006-02-28. The goals of the various hands are as follows: Two sets of three of a kind. Two runs of three. Three of a kind and a run of four. Two sets of four of a kind. Three of a kind and a run of five. Three sets of three of a kind.