Knightmare Chess - Mate in 1
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!
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.
