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.
Playing the Game. 1  1. The white player makes the first move. 2  2. Incorporate the en passant rule. 3  3. Take turns.  4. Always think a step or two in 1  advance. 5. Know how to castle..  6. Win the game by checkmating your opponent's king.