The ordering is critical and was a source of subtle bugs: \pushstate must be called after \makemove (which populates the \save@* registers) but before \updategamestate (which modifies them). Reverse for unmake: \popstate first, then \unmakemove. Getting this wrong produces moves that look almost right but occasionally corrupt castling rights or en passant state (the kind of bug that shows up once every 50 games).
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Александра Лисица (Редактор отдела «Забота о себе»)
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int main(int argc, char **argv) {