[tfseoksh] chess variants more elegant than chess

we propose chess variants based on correcting "nits" of orthodox chess, things that had made orthodox chess inelegant and complicated.  the given answers to questions below correspond to orthodox chess.  other answers would define variants.

two-square initial pawn push?  Y
(if Y:
  en passant capture by pawn?  Y
  en passant capture by other pieces?  N
)

castling?  Y
(if Y:
  castling while in check?  N
  castling through check?  N
  en passant capture of rook?  N
  castling privilege can be regained by moving king and rook back to starting squares?  N
)

passing?  N
(if N:
  outcome when no moves except king moving into check (win, draw, loss, forced pass)?  draw (stalemate)
  outcome for player with no moves at all (win, draw, loss, forced pass)?  draw (stalemate)
)

black guaranteed same number of moves, e.g., draw by mutual checkmate or both kings captured?  N

underpromotion?  Y (future post mpyfvglu)

50-move rule?  Y