I think bughouse is the most popular of chess variants (if you don't count national variants like Xiangi or Shogi). It is usually played by 4 people, but I think 2-player version should be fun as well.
(скрий) Поддържайте Входащата си кутия чиста като Архивирате важните съобщения и използвате опцията "Изтрий всички съобщения". (pauloaguia) (покажи всички подсказки)