Knightmare Chess is a proprietary game published by Steve Jackson Games.  It is something like a combination of chess and Magic: the Gathering.  In Knightmare Chess you play a regular game of chess, but in addition, you have a hand of cards that gives you "special powers".  This problem is inspired by that game.

We'll start off with a really easy one.

Amy

White to move and mate in 1.

Your special power:  After you make your move, you get to convert one of your bishops into a white knight or one of your opponent's bishops into a black knight.

Assume that in reply to your move, your opponent can only make a standard chess move; i.e., he has no special powers available.

Oh a magic bishop?

I love Steve Jackson games - he's got me hooked on "Munchin" - lol

Anyway, 1.Nf5+ (B on g6 changes to a N, either color!), mate!

Barefoot_Player

(does this make a firster? ;)

Yep.. Nf5 then transform Bg6 into a Knight

Swish!

Right, good job !  (Although, just for the sake of completeness, your special power only allows you to convert Bg6 into a black knight)

I'll have more Knightmare Chess problems in the future...just for fun.

Nf5+ Bg6=N #