Camillo Gamnitzer, StrateGems 2017, 2. Preis
Position: 4Q1b1/1pp2p2/2P2P1n/3N3R/4N1p1/5kPp/p1p4p/r1b2Knr w - - 0 1
 
selfmate in 5

Black: Bg8, b7, c7, f7, Nh6, g4, Kf3, h3, a2, c2, h2, Ra1, Bc1, Ng1, Rh1
White: Qe8, c6, f6, Nd5, Rh5, Ne4, g3, Kf1

Some non-thematic attempts:
1. cxb7? (2. Dc6/Da4) Lh7!
1. Dd8?/Dd7?/Dc8?/Db8? (2. Sg5+ Kxg3 3. Dxc7+ Lf4#)
1. - Kxe4!

Thematic:
1. De5? (2. Df4+ Lxf4#) L~+! 2. Dxa1...

1. De7! (2. Dxc7! [3. Df4+/S~+] Kxe4 3. De5+ Kd3 4. Dc3+ Ke4 5. De3+ Lxe3#; 3. - Kf3? 4. Df4+/De3+ LxD#)
1. - Tb1
2. De5! Tb~ → defence-replacement, leaving battery-position instead of battery-fire
3. Sd2+! Lxd2 → without annoying check
Finale: 
4. De2+ Kxg3
5. Dg2+! hxg2#
6. Ke1??!

Calm, flightsquare-giving full-length-threat leads to
voluntary black battery-destruction, Brunner Dresden.
Special outcome: battery-front-piece c1 gains control over
a white K-flightsquare...on battery-line! Motive inversion.

The problem demonstrates the patented logical style which Camillo is known for (aus dem Preisbericht)