Messiah: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 Ngf6 11. Bd2 e6 12. Qe2 Be7 13. O-O-O O-O 14. Rhe1 a5 15. Nf5?!<Deviating from Huebner vs Larsen, 1980 15. Kb1, where Hübner was tortured for a long time.>
15...Bb4!?
<I fail to see what was wrong with 15...exf5 16. Qxe7 Ne4 17. Qxd8 Rfxd8 18. Re2 Ndf6=, however, 15...Bb4 also holds equality.>
16. Nxh6+ gxh6 17. c3 Re8!?
<Sacrificing the bishop to open wide the a-file, hoping for back rank mates - if White does not capture, then the bishop will return to f8, and Black's position is better to play.>
18. cxb4 axb4 19. Ne5 Rxa2 20. Bxh6 b3 21. Nxd7?
<This knight offer should not have been accepted. White has three ideas that make sense:>
<The 21. Rd3 Ra1+ 22. Kd2 Qa5+ 23. Rc3 Ra2 24. Qf3 Rxb2+ 25. Kd3 Qb5+ 26. Rc4 Nc5+! <(26...Nb6?? 27. Qg3+ with checkmate)> 27. dxc5 Rd8+ 28. Ke3 Nd5+ 29. Kd4 Nc3+ 30. Ke3 Nd5+ 31. Kd4 Nf6+ 32. Ke3 draw must be calculated very precisely.>
<21. Qe3 Nxe5 22. Qg5+?! <(better is 22. Qxe5 <(22. dxe5?? Ra1#)> Kh7 23. Bg5 Ng4 24. Bxd8 Nxe5, and both captures lead to a complicated equality)> Ng6! 23. hxg6 Ra1+ 24. Kd2 Rxd1+, and the Black queen arrives on d4 with a check.>
<21. Nc4?! tries to slow down the operations on the queenside, to which Black can reply with some extreme variations:>
<<21...Qa8 22. Rd3 Kh7 (slows down kingside ideas) 23. Bg5 Ra1+ 24. Kd2 Nb6! 25. Rc3! Nxc4+ 26. Qxc4 Rxe1 27. Bxf6! Qa1 28. Qd3+ Kh6 29. Qf3! Rg8 and Black is objectively a little bit better, the wild play may go on.>>
<<21...Ra1+ 22. Kd2 Ra4 23. Qf3 Kh7 24. Bf4! Nd5 25. Bg3 f5 26. Qxb3 Rb4 27. Qc2 Qg5+ (why not?) 28. Ke2 N7f6 29. Kf1 Qxh5 30. Nd6 guarantees zero advantage for Black.>>
<<21...Nb6 22. Qd3 (threatens Qg3) <(22. Kb1 Nxc4 23. Qxc4 Qa5 24. Qxb3 Ra1+ 25. Kd2 with complicated play)> Ra1+ <(or 22...Ng4 immediately, harassing the f2 pawn)> 23. Kd2 Rxd1+ 24. Kxd1 Ng4 25. Be3 Nd5 26. Qxb3 Qh4 seems to cement Black's advantage, although tactics are ever-present on both sides.>>
<<21...Nc5?! and the engine thinks 22. Qe5 Kh7 23. Bg5 Nfe4 24. Rxe4 Qxg5+! 25. Rf4 Qxe5 26. Nxe5 f5 27. dxc5 Ra1+ 28. Kd2 Rd8+ 29. Nd3 Rxd3+ 30. Kxd3 Rxd1+ 31. Kc3 Rc1+ 32. Kxb3 Rxc5 is the way to equality.>>
<<21...Qe7 (with devilish ideas of a later Qa3) 22. Qd3 Ng4 23. Qg3 Nf6 24. Nd6 Rd8 <(24...Rea8? 25.f3 and the knight falls.)> 25. Bf4 c5 26. dxc5 Qc7 27. Qxb3 Qxc5+ 28. Qc4 Qxf2 29. Re2 and I think Black has the pull.>>
<<21...Kh7 22. Bg5 Rg8 23. f4 b5 24. Qd3+ Kg7 25. Ne5 Nxe5 26. fxe5 Qa5 27. Bxf6+ Kf8 28. Qc3 Qxc3+ 29. bxc3 Rgxg2 30. Kb1 leads nowhere.>>
<<21...Ra4 22. Na3 Qa5 23. Rd3 Ra8 24. Rg3+ Kh7 25. Bd2 Qf5 26. Rxb3 Rxd4 27. Rf3 Qxh5 28. Rh3 Rh4 29. Qd3+ Kg7 30. Reh1 Rxh3 31. Rxh3 Qc5+ 32. Bc3 and it is highly difficult to find an advantage for Black.>>
[to be continued...]