Why Andernach? :)

 

PG 3.5 Andernach*, Breton Adverse**, Extinction***

* Andernach chess is a chess variant in which a piece making a capture (except kings) changes colour. 

** When a piece is captured, another piece of same nature belonging to captured side (if any) must also disappear.

*** A side is in check if it is threatened to no more have a kind of piece it owned in the diagram position. Promotions to King are allowed.

Sol. 1.e3 Sc6 2.Bb5+ Se5 3.Qh5+ g5 4.f4#

The Killing King

PG 7.0 Disparate*

1.f3 Sh6 2.Kf2 f6 3.Kg3 f5 4.Kh4 f4 5.Kg5 Sf5 6.h4 Kf7 7.Rh3 Kg6#

* If one side makes a move with a piece type “x” (black, white, neutral, half-neutral, etc., King included), the other side cannot answer immediately by moving a piece of the same type “x”.