That's fine!
Yet I think, luck's what you'd need.
One more tipp out of my tries in this direction: the engine or it's setting, that's best in Backward of the positions should have best chances with long computing started with empty hash.
I didn't try Sting very long till now, cause it can use 8G hash only, so TCs of more than an hour probably wouldn't help much with this one, even if it for sure is the best one as for cyclic Zugzwang together with lazy King- demand. E.g. it solves Constrictor(1), which I wouldn't have thought to be possible some years ago, when Mihai composed it.
As for tweaking his engine Marek could give Sting special code for each an every study probably, but he's fair enough to say so, if he did, and probably it would make the engine weaker as for other positions.
McBrain with switched off nullmove and maybe ICCF- option chosen too, Matefinder with Study Mode on are both good at Chichitza, Houdini (ev.Tactical) for some other positions too, maybe to change Houdini's 50 move- boundary could help as for the fortress Stubbornness, lowering it much, and or letting it compute rather long, question would be, if the output- line then would be a correct one, even it the eval would get somewhat near to 0.0 together with correct first move.
Here's some output after short computing with 50Moves set to 10 and Tactical1:
5: Mihai Neghina5 - Stubbornness, White to move and draw
8/b4kp1/2p1p3/5pB1/p1PP4/1p6/3K1P2/3N4 w - - 0 1
Analysis by Houdini 6.03 Pro x64-popc:
1.Kc3 Bxd4+ 2.Kxd4 b2 3.Nxb2 a3 4.Nd3 a2 5.Ne5+ Ke8 6.f4 a1Q+ 7.Kc5 Qa6 8.Kd6 Qb7 9.Kxe6 Qc7 10.Bh4 Qa5 11.Kxf5 Qa1 12.Bg5 Qh1 13.Ke6 Qd1 14.Kf5 Qb3 15.Kg6 Kf8 16.Kf5 Qh3+ 17.Ke4 Kg8 18.Kd4 Qa3 19.Bh4 Qd6+ 20.Ke3 g6 21.Bg5 Qa3+ 22.Kd4 Qb4 23.Ke3 Kg7 24.Kd3 Qb6 25.Ke2
-/+ (-1.25) Depth: 35/75 00:06:00 13167MN
Now one could say, -1.25 at least isn't a for sure losing one eval anymore, and of course, going into the line it's getting smaller more and more.
Yet 0.0 at the starting position still is something different and -1.25 isn't a real drawing eval neither.
Give me your news.