In a manful manner; with the characteristics considered typical of a man, such as strength, courage, and determination
She manfully struggled on, however - womanfully would perhaps be a stronger and more appropriate word. She had to calculate not only how to play her own hand correctly, but she had to calculate on her partner's probable errors.
If you say that someone, especially a man, does something manfully, you mean that they do it in a very determined or brave way. They stuck to their task manfully. in a brave, determined way
in a manful manner; with qualities thought to befit a man; "having said her say Peggy manfully shouldered her burden and prepared to break up yet another home