用什么水洗脸对皮肤好处多 Play Chess vs computer or a friend

The Computer Player is GarboChess and is very skilled.

Easy mode is a little bit hard, and hard is very hard indeed, with an ELO above 2500.

Castling

To castle, move the king two spaces towards the castle like this: And you get this:

Note: according to the rules of chess you are only allowed to castle if neither King nor Castle he moved, there is a clear path between, and no part of path (including King) is threatened.