In this game my opponent made a mistake... and then I almost overlooked checkmate because I thought it was too simple!

I'm not sure what you mean you "quadruple checked". I'm thinking 1) visualize it in your mind 2) use the analysis board 3) ask your friend who is a master 4) put it into Rybka. Of course I'm kidding! (the last two would be cheating and I know Erik's not a cheater)

Very nicely played by white!

Cool! I probably would have missed that if it was my game. good job.

yeah. i just kept looking over and over for a way for the black king to escape or block the check. it just seemed implausible!

It's a helpmate, basically..... black has to cooperate to bring it about.

Which is why helpmates are the best form of chess composition.....

From one of my crazy 3 min gambit openings, a similar idea (I can't remember how the king's position is named here, something to do with his own self-imposed prison... anyone?) And if white plays Kd1, what do you think happens?

Nice one!  Also probably 9 e5 gave you a won position (9... de 10 Nxe5 Nxe5 11 Bxb7).

nice play Erik, does seem like a strange mate: distant Q-check on an open board!

This should be called Lewis' mate:

Although young Sabine Guettler seems to have been quicker (in the case of her opponent, resistance evidently was - ah- futile):

I think ur opponent won that game!

erik, ur 13 move mate was fantastic, thanks for posting!

i do 10 move mates hahah

Oh man!

 u try but ur opponent won, ur moves were smart.

 making use of  possible checks yep more keenly playing nice one bro.