A simple method to check if a move delivers checks.

[OliverBr]

Have I missed something?

Castling ? This is the only king move that can give a direct chess, through the rook actually.

Nice one! As Castling is a "King-move" in OliThink also I would have missed this.

[OliverBr]

Also, the way you access data with arrays etc is quite inefficient, but since I don't know your code and what you're trying to achieve, I will ignore that.

Do you mean, by e.g.

Code: Select all

BIT[t]

instead of

Code: Select all

1LL << t

?

Easily explained: I tested it thoroughly with millions of games and BIT[t] was a little faster.
My explanation: BIT[64] (or nmoves[64]) are small arrays and fit easily in any level x cache. Maybe I am wrong, but this was my reasoning.