Tactics for Beginners : Overload

From one of my games (analysis, it was actually Black's move in the game):

Hammer you should not tell the solution up front.............!!!

We know that you know, but we want to find out by ourselfes  

The final moves of that same game also formed an interesting tactic... a cross-pin.

wow, that is really difficult!!!! not sure I would find in a match

Here's the whole game:

You must be really really clever, seeing this combination!!!

I used to teach tactics, at chess clubs around the Canadian Maritime provinces.

EDIT: which doesn't rule out the possibility that I'm really really clever, of course.

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Thankx blueemu for this wonderful post. Its great help for beginners like me.