Thanks, Louis, stored it too.zullil wrote: ↑Sun Oct 13, 2019 5:44 pm1. Qf6+ Bxf6 2. gxf6+ Kg8 3. Ng5 Nxa3 4. Rxh7 Nb5 5. h4 Nxd4

Stockfish-dev says:

+9.24 6. Rg7+ Kh8 7. cxd4 c3 8. Bxc3 Bb5 9. Rh7+ Kg8 10. Bg4 Qa6 11. Rg7+ Kh8 12. Rd2 a3 13. h5 a2 14. hxg6 a1=Q+ 15. Bd1 Qxd1+ 16. Rxd1 fxg6 17. Bb4 Bd3 18. Kg2 Bf1+ 19. Rxf1 Qe2+ 20. Rf2 Qh5 21. Rh7+ Qxh7 22. Nxh7 Kxh7 23. Bxf8 Rxf8 24. Kh3 Rc8 25. Rf3 Kg8 26. Kg4 Rc2 27. Rxb3 Rg2+ 28. Kf3 Rh2 29. Rb8+ Kf7 30. Rb7+ Kf8 31. Re7 Rh4 32. Ke3 g5 33. Rxe6 Rh3+ 34. Kd2 Rh4 35. Kd3 Rh3+ 36. Kc2 Re3 37. Kd2 Rf3 38. Re7 g4 39. Rg7 Ke8 40. Rxg4 Kd8 41. Ke2 Rf5 42. Rg8+ Kc7 43. Rg7+ Kc8 44. Ke3 (depth 53, 0:06:40)

After another quick Backward:

1r3rk1/5p1R/1qb1pPp1/3pP1N1/p1pn3P/1pP5/1P2B3/3RB2K w - - 0 1

Analysis by asmFishWCP_2019-10-11_popcnt:

27.Tg7+ Kh8 28.cxd4 c3 29.Lxc3 Lb5 30.Lg4 Da6 31.Td2 a3 32.h5 a2 33.Th7+ Kg8 34.hxg6 a1D+ 35.Ld1 Dxd1+ 36.Txd1 fxg6 37.Tg7+ Kh8 38.Lb4 Ld3 39.Kg2 Lf1+ 40.Txf1 De2+ 41.Tf2 Dg4+ 42.Kf1 Dd1+ 43.Le1 Dd3+ 44.Kg2 De3 45.Ld2 Dxd4 46.Th7+ Kg8 47.Kf1 Dxe5 48.Tg7+ Kh8 49.Txg6 Ta8 50.f7 d4 51.Th6+ Kg7 52.Sxe6+ Dxe6 53.Txe6 Txf7 54.Tb6 Te7 55.Txb3 Ta1+ 56.Kg2 Te6 57.Tg3+ Tg6 58.Txg6+ Kxg6 59.Kg3 Ta6 60.b4 Te6 61.Tf4 d3 62.Tf2 Te4 63.Tf3 Tc4 64.Kf2 Te4 65.Txd3 Th4 66.Td8 Th3 67.Td4 Tb3 68.Ke2 Kf7 69.Td3 Tb1 70.Kf3 Kf6 71.Ke4 Ke6 72.Kd4 Kd6 73.Kc4+ Kc6 74.Td4 Kb7 75.Lc3 Tc1

+- (5.68) Tiefe: 51/98 00:02:00 3284MN

At least some more Rg7 Kh8 Rh7 Kg8 can be spared still.

So 5...Nxd4 (?) yet looses too.

Will have a closer look at 5...Nd6 even more now, if it really holds, (and I haven't found a way to avoid the fortress till now) I won't come back to this, and I just take back the ?! for it in my .pgn too.