That's because you were playing a computer, which has no randomness in it.
Most Recent
Forum Legend
Following
New Comments
Locked Topic
Pinned Topic
http://www.chess.com/livechess/game?id=680078976
http://www.chess.com/livechess/game?id=680380581
Look at the moves and positions at any given time before the endgame. They are really similar.