From what I read in this web page http://www.g-sei.org/acqua/
the engine don't know about some chess rules, incluing "en passant". If such is the case, this is not an engine for chess but for an unnamed chess variant.
"Per ora sa giocare malissimo. Non conosce stallo, en passant"
Last edited by xadrez1978 on Tue May 24, 2016 5:39 pm; edited 2 times in total (Reason for editing : typing)