Camillo Gamnitzer, The Problemist 2004, 2. Lob
Position: n4Q2/npP5/1Pp5/1b3N2/1Pp1P2R/4Pkp1/2pp4/2rrbKB1 w - - 0 1
 
selfmate in 5

Black: Na8, Na7, b7, c6, Bb5, c4, Kf3, g3, c2, d2, Rc1, Rd1, Be1
White: Qf8, c7, b6, Nf5, b4, e4, Rh4, e3, Kf1, Bg1

This composer never makes life easy for solvers, but the rewards are considerable (JMR)

1. Dg8? 1. Dg7? (2. Dxg3+ Lxg3#) g2+!

1. Dd6? (2. Dxg3+) c3+!
2. Dd3 forced (3. De2+ Lxe2#) La4!

1. Df6! (2. Sxg3+ Kxg3 3. Dg5+ Kf3 4. Dg6! ~
5. Th3+ Lg3#)
1. - La6! (4. - c3+ 5. b5...)
2. Dd6! c3+
3. Dd3
 (4. De2+) Sb5! → instead of - La4
4. Sd4+ Sxd4
5. exd4+! Lxd3#
  
1. - c5? (4. - Ld7 5. - Lxh3+) 2. De5! ~ [c3? 4. Dxb5??]
3. Dxg3+