Actually if there is a force mate since the very beginning of a game , the only thing people will do is to remember the steps of that mate in X. If you want to find a force mate since a position which both players play a few moves to create a pattern, you can search "Chess traps". Actually the fool's mate is a force mate since the second move and it is a forced mate in one.
Fastest forced mate?
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OK, so we all know about the fastest mate (Fool's mate), but what I'm interested in is the fastest forced mate that can occur in chess... this for a chess program I am writing, in which I need to test it's capacity to see checkmates more than one ply ahead.
EDIT: Perhaps my question is not very clear. What I mean to ask is this: what is the shortest (requiring least amount moves) way to achieve a position from which one side can create a forced mate?
Thanks!