A Decomposition Trick

h#2

Decomposition Chess*

Sol. 1. h5, Rh3 2. h4, (R=N+P) Nf4#

* Decomposition Chess. Rules. 1. Every man is decomposable as follows: Q=R+F; R=F+P; F=PP. 2. The decomposition is actuated with the mere removal of one of the components (the other remains on the square).