| Black: | Na8, Ra7, c7, Na6, b6, c6, g5, b4, Kf4, Rg4, g3, Bh3, g2 |
| White: | Nf8, e7, Nf7, Ke6, Bf6, c5, c3, d3, f3, Qe2, Rg1 |
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Tries:
1. Txg2!?! Lxg2!
1. Sh7? bxc3!
1. c4!! thr. (2. Sh7! ~ 3. Dd2+ Kxf3 4. Shxg5+! Txg5#)
1. - Sb8! (2. - Ta2 3. - Txd2!)
Attention:
2. Txg2!! thr. (3. De5+ Kxf3 4. De4+! Txe4#) Lxg2
Attention:
3. Lxg5+! Txg5, without harmful(!) chess
4. Sg6+! Txg6#!
Direct mate by the [former] battery-front-piece...
5. Kd7?? → well-camouflaged reason of 1. c4! Sb8!
[2. - Sd7? 3. Lxg5+ Txg5#; 4. Kf6??]
Another contribution to one of my favorite sujets:
Quiet destruction of black batteries, presented in special form and within just four moves (CG)
Perfect! (Erik Zierke)
Compare e. g. "StrateGems" 2019, S#4
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Camillo Gamnitzer, The Problemist 2019 
