dxe6
THE HARDEST MATE IN ONE!!

And for some easier mate in ones (the first one looks difficult so a hint is: it's from a pawn)(and the third one looks difficult so the hint is: with a pawn underpromotion)

Other mate in ones you can try if the first one looks difficult: (but they still look difficult)
I'm not sure if you did it on purpose or not, but you can literally just capture the king on the first one 💀

Other mate in ones you can try if the first one looks difficult: (but they still look difficult)
I'm not sure if you did it on purpose or not, but you can literally just capture the king on the first one 💀
Thanks for reminding me! There should be a knight on d6, but I forgot it!

Easy mate in 2.
For mate in 1, you have to attack g7 and h8 with one move, which i don’t think is possible.

This is the hardest mate in one!