An easy trap to the black queen.
Nice other examples of the situation. In your examples the black has the opportunity to save the queen, but I think that they would lose even in your examples.
Thanks for posting Scotrtf and blueemu.

Ha, nice one. I'm sure I could be black in the first one of salatoy ;-(
to blueemu: Why don't black play 6. ... dxe5?
Ha, nice one. I'm sure I could be black in the first one of salatoy ;-(
to blueemu: Why don't black play 6. ... dxe5?
Hahaha, I'm almost sure that you weren;t my opponent.