variant engie for Alice Chess

[H.G.Muller]

I realized that it only required a trivial change to convert Fairy-Max into an engine for Alice Chess, when you map the two boards on which Alice Chess is normally played into one. (Which can always be done, because only one of the two corresponding squares on each board can hold a piece. So I made a version of it dedicated to Alice Chess, which I called "Looking Glass 4.8S". It can be downloaded from

http://hgm.nubati.net/Alice.zip .

There is no explicit support for Alice Chess in WinBoard yet; it has to be played as variant normal, with legality checking off. (As it will regularly have sliders jump over many other pieces, because these other pieces are in reality on the "other board". But you will have to remember which piece is on which board yourself, as WinBoard will not yet indicate this.)

I used rules where there is no e.p. capture. (I don't feel that most proposals for how to do those are consistent.) as for castling, it is possible when K and R are on the same board, and will bring both K and R to the other board. But all squares in between K and R have to be empty on both boards, and don't ask me which squares exactly must not be attacked. Usually this will seldomly be a problem, however.