a) 1.Rc8+ Rc7 2.Ra7 Rc8:#
b) 1.Ra6+ Rb6 2.Rb8 Ra6:#
Would be OK as the final positions of a longer s#, as published: hmmmmmmm... [Jorma Paavilainen]
394. Milan Velimirovic Yugoslavia
s#4
8+5
1.Qf2! (~)
1... Ra3 2.Rc4+ Rd3 3.Rd4 Kc1 4.Qc2+
1... Ra4 2.Rc5+ Re4 3.Re5 Kc1 4.Qc2+
1... Rb5: 2.Rc6+ Rf5 3.Rf6 Kc1 4.Qc2+
1... Ra6: 2.Rc7+ Rg6 3.Rg7 Kc1 4.Qc2+
WR vs. BR opposition duel. With WB on d4 (instead on h8) the key 1.Bh8! would be visually more beautiful, but I think that non-standard waiting move more original and difficult. [Author]
A kind of a systematic movement in a perfect setting. [Jorma Paavilainen]