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A curious position in the Marshall Attack - Spanish game

A favorite position of mine in the Marshall attack arises after

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 Nf6 12.d4 Bd6 13.Re1 Ng4 14.h3 Bh2+ 15.Kf1 Nxf2 16.Qf3* Nh1

Can this odd position be better understood by performing analysis? Other resources perhaps do a more complete analysis, but what can we produce on our own with commercial chess analysis software and some available computer time?

Section A: 17.g4 this move is perhaps a logical first-choice... but instead we discover

best is 17...Bb7 18.d5 Qh4 19.Qxh1 and now:

[-0.57]  d=28  19...Rae8 20.Re3 f5 21.d6+ Kh8 22.Qxb7 Bxd6 23.Rxe8 Rxe8 24.Be6 Qxh3+ 25.Qg2 Qd3+ 26.Qe2 Qxe2+ 27.Kxe2 fxg4 28.Be3 Rxe6 29.Kd3 h5 30.Nd2 Kh7 31.Ne4 Kg6 32.Rg1 Bh2 33.Rg2 Be5 34.Bd4 Bf4 ouch... let's see if a deeper run keeps the advantage

[+0.00]  d=28  19...Rfe8 20.Re3 Rxe3 21.Bxe3 Qxh3+ 22.Ke2 Bc8 23.Kd2 Bxg4 24.Na3 Re8 25.Nc2 Bf3 26.Qf1 Qg4 27.a4 h5 28.axb5 axb5 29.Qxb5 Qg2+ 30.Kc1 Qh1+ 31.Kd2 Qg2+ 32.Kc1 Qh1+ 33.Kd2 Qg2+ 34.Kc1 Qh1+

Section B: 17.Bf4 this move appears best

best is now 17...Bb7 18.d5 Bxf4 19.Qxf4 g5 20.Qf3 Qd6 and now:

[+0.49]  d=31  21.Nd2** Rae8 22.Kg1 Ng3 23.Kf2 Qf4 24.Qxf4 gxf4 25.Kf3 Kg7*** 26.c4 bxc4 27.Bxc4 Nf5 28.Kxf4 Ne7 29.b3 Bxd5 30.Rac1 Ng6+ 31.Kg3 Rxe1 32.Rxe1 Rd8 33.Bxd5 Rxd5 34.Nf3 Rc5 35.Re4 Ra5 36.Re2

**after 21.Kg1 Rfe8 22.Nd2 Ng3 23.Kf2 Qf4 24.Qxf4 gxf4 there is:

[+0.51]  d=32  25.Kf3 Kg7 26.a4 Rxe1 27.Rxe1 bxa4 28.Bc4 Nf5 29.Kxf4 Nh4 30.Re4 Rd8 31.Nf3 Ng6+ 32.Ke3 a5 33.g4 Bxd5 34.Bxd5 Rxd5 35.Rxa4 Rb5 36.Ra3 Rxb2 37.Rxa5 Rb8 38.Nd4 Rb1 39.Rc5 Rh1 40.Rh5

***[+1.08]  d=25  25...Nh5 26.Ne4 Rd8 27.Red1 Kh8 28.a4 Rg8 29.axb5 axb5 30.Kf2 Rde8

*Section C: 16.Kxf2

we look at 16...Qh4+ 17.Kf1 Bxh3

[+0.56]  d=28  18.Re3 Bg4 19.Qe1 Qh5 20.Nd2 Bf4 21.Ne4 Qh1+ 22.Kf2 Qh4+ 23.Rg3 Bxg3+ 24.Nxg3 Rfe8 25.Be3 Re7 26.Kg1 Rae8 27.Nf1 Qxe1 28.Rxe1 Be6 29.d5 Bc8 30.Kf2 Bb7 31.Nh2 Rd7 32.Rd1 Red8 33.Bg5

[+0.48]  d=28  18.Qf3 Bg4 19.Re4 Rae8 20.Qxg4 Rxe4 21.Qxh4 Rxh4 22.Nd2 Bf4 23.Nf3 Rh1+ 24.Ng1 Bg3 25.Be3 Re8 26.Bf2 Bxf2 27.Kxf2 g5 28.Rf1 Re7 29.Nf3 Rxf1+ 30.Kxf1 h6 31.Ne5 Kg7 32.Nd3 Rd7 33.g4

Komodo 9.3 65:75:-200

+0.93/41    18.Qf3 Bg4 19.Re4 Rae8 20.Qxg4 Rxe4 21.Qxh4 Rxh4 22.Nd2 Bf4 23.Kf2 g5 24.Nf1 Bxc1 25.Rxc1 Re8 26.Ng3 Rf4+ 27.Kg1 Kf8 28.Bd5 b4 29.Nh5 Rf5 30.Bf3 bxc3 31.Rxc3 Rd8 32.Rc4 g4 33.Bxg4 Rfd5 34.Rxc7 Rxd4 35.Nf6 Kg7 36.Rc6 a5 37.Bf3 Rb8 38.Nh5+ Kf8 39.Rc2 Rbd8 40.Rc7 Rb4 41.b3 a4 42.Nf6 Kg7 43.Nd5 Rd4
 

Conclusions

1. This complicated position is good for white, with Sections B or C as the main line

2. Commercial chess analysis software appears to be able to generate reasonably accurate analysis of who is better in this complicated position