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'''Chess960''', (or Fischer Random Chess)<br/>
a chess variant invented by former [https://en.wikipedia.org/wiki/World_Chess_Champion World Chess Champion] [https://en.wikipedia.org/wiki/Bobby_Fischer Bobby Fischer], introduced on June 19, 1996 in [https://en.wikipedia.org/wiki/Buenos_Aires Buenos Aires], [https://en.wikipedia.org/wiki/Argentina Argentina] <ref>[http://www.chessvariants.org/diffsetup.dir/fischerh.html The birth of Fischer Random Chess] by [[Eric van Reem]]</ref> . Randomizing the pieces on its back rank has been known as ''Shuffle Chess'', but Chess960 introduces rules so that [[Castling|castling]] options are retained in all starting positions, one player's bishops must start on opposite-color squares, and the king must start on a square between the rooks, resulting in 960 unique positions, while the classical [[Initial Position|initial position]] is one of them. Chess960 practically handicaps the application of [http://en.wikibooks.org/wiki/Chess_Opening_Theory opening theory] in classical chess with the [[Opening Book|memorization]] of opening moves, both for human as well for chess programs.
=Make castling moves with chess GUIs=
For chess, players typically make a castling move by moving their Kings to two cells, left or right. However, for Chess960 sometimes they can’t move their King to two cells since the target cell maybe still occupied by a piece. Many chess GUIs solved that difficulty/ambiguity by changing the way to make castling move: move the King to capture it own Rook.
=Programming=
