11.Qf8+, Qe8;
12.Nf7+, Kd7;
13.Qd6#;
EDIT: Please note that at time of posting, the puzzle wasn't corrected yet.
11.Qf8+, Qe8;
12.Nf7+, Kd7;
13.Qd6#;
EDIT: Please note that at time of posting, the puzzle wasn't corrected yet.
11.Qf8+, Qe8;
12.Nf7+, Kd7;
13.Qd6#;
Dunno why Steinitz didn't played like that...
I was kind of confused as to why he played the way he did. But that is why he is the master I guess.
Man, that is pretty amazing - the fact that he could check his king repeatedly to mate, not taking any of the material - which he could have easily done - if I am ever that good - I should probably be entering tournaments because 9 times out of 10 I would probably just be happy being up a queen...oh and winning the game of course 
GOOD LUCK!