Engine 64 bit

[Krzysztof Grzelak]

I have a question as to whether it is difficult to rewrite engine versions with 32 bit to 64 bit.

[BertTuyt]

I would say that is doable-ish.
Keep in mind that it is only efficient if the software design already was using the benefits of 64bit (like 64bit bitboards).
Otherwise you wont see any speed improvement (or even worse performance).

Bert