Vinvin wrote: ↑Wed Aug 14, 2019 10:59 pm
Is there some conclusion for this position now ?
Eval from Stockfish_190726 (3 best moves) after Bg4!? with a bit of learning.
[d]r3r1k1/pp1q1p2/2p2npb/PPPp2np/3PpNb1/2N1P1PP/1R1B1PBK/3Q1R2 w - - 1 20
Code: Select all
Stockfish_19072603_x64_modern:
...
34/48 01:35 834 126 572 8 764 135 -1,81 20.Qc1 Nf3+ 21.Bxf3 exf3 22.hxg4 Bxf4 23.exf4 Nxg4+ 24.Kg1 Ne5 25.f5 Nd3 26.Qb1 Qxf5 27.Kh2 Nxb2 28.Qxb2 h4 29.Qc1 Qg4 30.Bg5 hxg3+ 31.fxg3 f6 32.Bxf6 Kf7 33.Qf4 Qxf4 34.gxf4 Re3 35.Nxd5 cxd5 36.Be5 Rb3 37.Kg3 Rxb5 38.Kxf3 Rxa5 39.Rh1 Ke6 40.Rh7 Rb5 41.Rg7 Rb3+ 42.Kg4
34/51 01:35 834 126 572 8 764 135 -1,33 20.hxg4 hxg4 21.Rh1 Nf3+ 22.Bxf3 gxf3 23.Nh3 Kg7 24.Qf1 Rh8 25.Kg1 g5 26.Ra2 g4 27.a6 gxh3 28.Qxh3 Qxh3 29.Rxh3 Bxe3 30.Rh4 Bxd2 31.Rxd2 Rhb8 32.axb7 Rxb7 33.bxc6 Rc7 34.Ra2 a5 35.Kf1 Rxc6 36.Ke1 Kg6 37.Na4 Re6 38.Nb6 Rae8 39.Rxa5 e3 40.Ra7 exf2+ 41.Kxf2
35/54 01:35 834 126 572 8 764 135 -0,85 20.Qb1 Nf3+ 21.Bxf3 Bxf3 22.Ng2 a6 23.bxc6 bxc6 24.Rb7 Qe6 25.Ne1 Ng4+ 26.hxg4 hxg4 27.Rh1 Kg7 28.Kg1 Bxh1 29.Kxh1 Bg5 30.Kg1 Rh8 31.Nd1 Qf5 32.Bc3 Rh3 33.Rb8 Rxb8 34.Qxb8 Bf6 35.Kf1 Qh5 36.Ke2 Rh1 37.Qb7 Qh3 38.Kd2 Qf1 39.Kc1 Qc4
Vincent,
Here is a PGN of the research I have done with Stockfish of all 3 of the moves that you asked about. A lot of times I had to guide Stockfish on Black's moves and some of White's moves because it didn't understand (as most chess programs don't seem to understand) the position and therefore made seemingly (to me) inferior moves. Of course I am open to ANY suggested improvements for Black or White on any of the moves I have in this PGN, and of course any suggestions that are not in this PGN.
[pgn][Event "Computer chess game"]
[Site "WORKSTATION-PC"]
[Date "2019.08.14"]
[Round "?"]
[White "Workstation"]
[Black "Workstation"]
[Result "*"]
[BlackElo "2400"]
[Time "19:25:29"]
[WhiteElo "2400"]
[TimeControl "1800+5"]
[SetUp "1"]
[FEN "r3r1k1/pp1q1p2/2p2npb/PPPp2np/3PpNb1/2N1P1PP/1R1B1PBK/3Q1R2 w - - 1 20"]
[Termination "unterminated"]
[PlyCount "12"]
[WhiteType "human"]
[BlackType "human"]
20. Qb1 (20. Qc1 20. .. Nf3+ 21. Bxf3 Bxf3! {And not 21...exf3 like
Stockfish suggest although that move wins also} 22. Ng2 (22. a6 Ng4+ 23.
Kg1 Ne5 (23. .. Bxf4 24. exf4 Ne5 25. Kh2 Nd3 26. Qa1 Nxb2 27. Qxb2 b6 28.
bxc6 Qxc6 29. f5 bxc5 30. Qb7 Qxb7 31. axb7 Rab8 32. dxc5 d4 33. Nd5 Rxb7
34. Nf6+ Kf8 35. Bh6+ Ke7 36. Nxe8 Kxe8 37. g4 Rb2 38. Bg7 Rd2 39. Kg3 d3
40. gxh5 gxh5 41. h4 Rc2 {Stockfish +8.74 for Black}) 24. Kh2 Bxf4 25. exf4
Nd3) 22. .. Ng4+! 23. hxg4 hxg4 24. Rh1 (24. a6 Kg7 {Stockfish +6.23 for
Black}) 24. .. Kg7 25. Kg1 Rh8 26. Kf1 Bg5 27. Rg1 Rh2 28. Ne2 Rah8 29. Bb4
Qf5 {Stockfish: +4.94 for Black}) (20. hxg4 hxg4 21. Rh1 Nf3+ 22. Bxf3 gxf3
23. Nxg6 (23. Nd3 23. .. Kg7! 24. bxc6 (24. Kg1 Rh8 {Stockfish: +7.60 for
Black}) 24. .. Ng4+ 25. Kg1 bxc6 26. Ne5 Nxe5 27. dxe5 Bg5 {+6.80 for black
says Stockfish}) (23. Nh3 Kg7 {Stockfish: +6.25 for Black} 24. bxc6) 23. ..
fxg6 24. Kg1 Bg5 25. a6 (25. Qf1? Kg7!) 25. .. b6! 26. bxc6 (26. cxb6 axb6
{Stockfish: +6.12 for Black}) 26. .. Qxc6 {Stockfish: +5.09 for Black}) 20.
.. Nf3+ 21. Bxf3 Bxf3 22. Ng2 {This move is probably worse than 22.a6} (22.
a6 Ng4+ 23. Kg1 Bxf4 {23...Ne5 and 23...Nf6 also work here.} 24. exf4 Nh6
{Threatining mate in 2 beginning with 25...Qxh3} 25. Kh2 bxa6 26. bxc6 Qxc6
27. Qc1 (27. Be3 Ng4+ 28. hxg4 (28. Kg1 Qe6 29. h4 Nxe3 30. fxe3 Qh3 31.
Kf2 Qg2+ 32. Ke1 Qxg3+ 33. Kd2 Qxh4) 28. .. hxg4 29. Rh1 Kg7 30. Kg1 Rh8
31. Rh4 Rxh4 32. gxh4 Rh8 33. Ne2 Qf6 {Stockfish: +4.98 for Black}) 27. ..
Rab8 28. Nd1 (28. Be3 Kg7) 28. .. Rxb2 29. Qxb2 Ng4+ 30. hxg4 hxg4 31. Rh1
Kg7 32. Kg1 Bxd1 33. f5 Bf3 34. Rh2 gxf5 {This continuation is probaly the
best that White can do Stockfish +4.04 for Black}) 22. .. h4! 23. a6 (23.
g4 Qc7+ 24. Nf4 Reb8 25. g5 Bxg5 26. a6 Bh6 27. bxc6 bxc6 28. Rb7 Qc8 29.
Nfe2 g5 30. Ng1 Rxb7 31. Qxb7 Qb8+ 32. Qxb8+ Rxb8 {Stockfish: +5.04 for
Black}) 23. .. Ng4+! 24. hxg4 Kg7! 25. axb7 Qxg4!! {ignoring white's
insignificant counterplay, and Stockfish finally sees that the position is
hopeless, Stockfish +6.25 for Black} *[/pgn]