Thom27: If I may put in an opinion: In reversi the situation is different from backgammon. There it is indeed an autopass, since the move involves the intervening dice throw.

In reversi, however, the situation resembles more that of checkers, where a piece jumps several pieces in a row. If, after player1's move player2 has no playable fields, player1 must place another piece (or pass, if he can't, in which case the game is ended here). It should be treated as a multi-move, not as an autopass.

That's the way it is implemented, for example, on Goldtoken. I don't know about other sites.