Mate with pinned piece (x4 different mate images)

Changed pin —Crossing checks—Royal battery—Square vacation—Transferred mate

1.g7? [2.g8=Q#]

1...Sxb4 (a)  2.g8=Q+ Kxc5+  3.Se4# (1)

1...Sc7  2. 2.g8=Q+ Se6  2.Qg2#

1...dxc5!(b)

 

1.Sg8? [2.Se7#]

1...dxc5 (b)  2.Se7+ Kd6+  3.Se4# (2)

1...Sxb4!(a)

 

1. Sg4! [2.Se3#]

1...Sxb4 (a)  2.Se3+ Kxc5+  3.Se4#  (3)

1...dxc5 (b) 2.Se3+ Kd6+  3.Se4# (4)

 

1...Qxc5 2.Rxc5+ Rxc5/dxc5  3.Se3#

 

Author´s note: The harmony of the problem is shown by these qualities:

1-Each try has a defense that ends with a thematic mate

2-The refutation of one try is the thematic defense of the other try, and vice versa.

3-In actual play both defenses/refutations reappear as defenses and with a thematic mate.

4-The 4 thematic mates, in tries and actual play, have a different mate images.

Probably  this thematic content is novelty

 

 

(1) n1R3Q1/1p1p4/R1qp1B1N/r1k2P2/Pn2N3/8/8/7K

(2) n1R5/1p1pN3/R1qk1BP1/r1p2P2/PP2N3/8/n7/7K

(3) n1R5/1p1p4/R1qp1BP1/r1k2P2/Pn2N3/4N3/8/7K

(4) n1R5/1p1p4/R1qk1BP1/r1p2P2/PP2N3/4N3/n7/7K