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Old 2017-02-23, 03:58   #1
MooMoo2
 
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Default Engine-assisted game vs Stockfish, move 27 discussion

The most popular move on the move 26 poll was ...Nxb4. Stockfish played 27. cxb4, and the FEN is:
2r2r1k/6bp/1q1p4/3Q1p2/1P2pP2/8/1P2B1PP/3R1R1K b - - 0 27

Game so far: 1.e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Bxf6 gxf6 11. Nd5 f5 12. c3 Bg7 13. Bd3 Be6 14. Nc2 O-O 15. O-O fxe4 16. Bxe4 Rc8 17. a4 f5 18. axb5 axb5 19. Bf3 e4 20. Be2 Kh8 21. Qd2 Be5 22. f4 Bxd5 23. Qxd5 Qb6+ 24. Kh1 Bg7 25. Rad1 b4 26. Nxb4 Nxb4 27. cxb4

Depth: 61 ply. Nodes searched: 952,704,596,348 (~953 G)
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Old 2017-02-23, 12:53   #2
WMHalsdorf
 
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27...Qxb4 gets us to an even position.
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Old 2017-02-23, 20:04   #3
richs
 
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Back in the Move 25 Discussion thread, Mr. Barnes suggested Qxb4 or Rc2 as the response . I believe he is away on a business trip. In the past dh1 has run Komodo and made suggestions; perhaps he is still following this game?
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Old 2017-02-23, 21:00   #4
dh1
 
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Houdini 5, 44-ply:
0.00 27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4
-0.15 27. ... Qxb4 28.b3 Qc5 29.Bc4 Rcd8 30.Rg1 Qxd5
-0.23 27. ... Qc6 28.Qxc6 Rxc6 29.Rd2 d5 30.Rxd5 Rc2
-0.23 27. ... Bxb2 28.b5 Qe3 29.Bh5 Qc5 30.Qxd6 Qxb5


Komodo-10.3, 37-ply:
0.00 27. ... Qxb4 28.b3 Rcd8 29.Bc4 Qc5 30.g3 Bc3
0.00 27. ... Rc2 28.Bc4 Qxb4 29.b3 Bc3 30.h3 Qb8
0.00 27. ... Bxb2 28.Qxd6 Qxd6 29.Rxd6 Ba3 30.Rb1 Rc2
-0.25 27. ... Qc6 28.b3 Qxd5 29.Rxd5 Bc3 30.Rxd6 Bxb4


Komodo-10.3, 57-ply (multipv only 2)
0.00 27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4
0.00 27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6
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Old 2017-02-25, 10:15   #5
gd_barnes
 
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I will be back in town on Tuesday in time to vote in the next poll.

I think that dh1 has more firepower than me so is able to look deeper using Komodo so I'll defer to his analysis.

I am OK with Qxb4 or Rc2.
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Old 2017-02-27, 19:41   #6
The Carnivore
 
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Quote:
Originally Posted by dh1 View Post
Houdini 5, 44-ply:
0.00 27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4
-0.15 27. ... Qxb4 28.b3 Qc5 29.Bc4 Rcd8 30.Rg1 Qxd5
I'm wondering what the trend is on Qxb4. Does it get worse than Rc2 as depth increases, or does it close the gap? What are the scores like for 35 ply and 40 ply?
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Old 2017-02-28, 10:10   #7
dh1
 
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Quote:
Originally Posted by The Carnivore View Post
I'm wondering what the trend is on Qxb4. Does it get worse than Rc2 as depth increases, or does it close the gap? What are the scores like for 35 ply and 40 ply?
I've not been saving analysis runs, but re-ran a two variation . I have been unable to confirm Qxb4 being inferior as in my previous Houdini-post with any engines.
Code:
 12/26    0.00    27. ... Qxb4 28.b3 Rf6 29.Rc1 Rcf8 30.Rc7 Qa3 31.Rd1 Qb2 32.Rd2 Qb1+ 33.Rd1
 12/26    0.00    27. ... Rc2 28.Bc4 Rxb2 29.b5 Rc2 30.Rc1 Rb2 31.Rcd1
---------------------------------------------------------------------------        
 13/26    0.00    27. ... Qxb4 28.b3 Rf6 29.Rc1 Rcf8 30.Rc7 Qa3 31.Rd1 Qb2 32.Rd2 Qb1+ 33.Rd1 Qb2
 13/26    0.00    27. ... Rc2 28.Bc4 Rxb2 29.b5 Rc2 30.Rc1 Rb2 31.Rcd1
---------------------------------------------------------------------------        
 14/31    0.00    27. ... Qxb4 28.b3 Rf6 29.Rc1 Rcf8 30.Rc7 Qa3 31.Rd1 Qb2 32.Rd2 Qb1+ 33.Rd1 Qb2
 14/31    0.00    27. ... Rc2 28.Bc4 Rxb2 29.b5 Rc2 30.Rc1 Rb2 31.Rcd1
---------------------------------------------------------------------------        
 15/31    0.00    27. ... Qxb4 28.b3 Rf6 29.Rc1 Rcf8 30.Rc7 Qa3 31.Rd1 Qb2 32.Rd2 Qb1+ 33.Rd1 Qb2
 15/31    0.00    27. ... Rc2 28.Bc4 Rxb2 29.b5 Qc5 30.Rb1 Rc8 31.Qxc5 Rxc5 32.Rxb2 Bxb2 33.Be2 Rc2 34.Bd1 Rc5
---------------------------------------------------------------------------        
 16/32    0.00    27. ... Qxb4 28.b3 Rf6 29.Rc1 Rcf8 30.Rc7 Qa3 31.Rd1 Qb2 32.Rd2 Qb1+ 33.Rd1 Qb2
 16/32    0.00    27. ... Rc2 28.Bc4 Rxb2 29.b5 Qc5 30.Qe6 Rb4 31.Be2 Rb2 32.Bc4
---------------------------------------------------------------------------        
 17/35    0.00    27. ... Qxb4 28.b3 Rcd8 29.Bc4 Qc5 30.Qe6 Rfe8 31.Qf7 Rf8 32.Qe6
 17/35    0.00    27. ... Rc2 28.Bc4 Rxb2 29.b5 Qc5 30.Qe6 Rc2 31.Rc1 Rb2 32.Rcd1
---------------------------------------------------------------------------        
 18/38    -0.08    27. ... Qxb4 28.b3 Rcd8 29.Bc4 Qc5 30.g4 Qxd5 31.Bxd5 Bc3 32.Rf2 fxg4 33.Bxe4 Rde8 34.Bc6 Re1+ 35.Rxe1 Bxe1 36.Rf1 Bd2 37.Kg2 Kg7 38.Kg3
 18/38    0.00    27. ... Rc2 28.Bc4 Rxb2 29.b5 Qc5 30.Qe6 Rc2 31.Rc1 Rd2 32.Rcd1 Rc2
---------------------------------------------------------------------------        
 19/43    -0.18    27. ... Rc2 28.Bc4 Rxb2 29.b5 Qc5 30.Qxc5 dxc5 31.Rb1 Rb4 32.Rxb4 cxb4 33.Rd1 Rb8 34.Kg1 Bf6 35.Kf2 b3 36.Bxb3 Rxb5 37.Be6 Kg7 38.Ke3
 19/43    -0.15    27. ... Qxb4 28.b3 Rcd8 29.Bc4 Qc5 30.g4 Qxd5 31.Bxd5 Bc3 32.Rf2 fxg4 33.Bxe4 Rde8 34.Bc6 Re1+ 35.Rxe1 Bxe1 36.Re2 Bc3 37.Re4 Bd2 38.b4 Bxf4 39.b5 h5 40.b6
---------------------------------------------------------------------------        
 20/43    -0.20    27. ... Rc2 28.Bc4 Qxb4 29.b3 Bc3 30.Rg1 Rf2 31.g3 Bg7 32.Rg2 Rxg2 33.Kxg2 Qc3 34.Rf1 Qb2+ 35.Kh1 Qd4 36.Qxd4 Bxd4 37.b4 Rc8 38.Be6 Rb8 39.Rb1 Bc3
 20/43    0.00    27. ... Qxb4 28.b3 Rcd8 29.Bc4 Qc5 30.Qe6 Rfe8 31.Qf7 Rf8 32.Qe6
---------------------------------------------------------------------------        
 21/50    -0.24    27. ... Rc2 28.Bc4 Bxb2 29.Rd2 Rxd2 30.Qxd2 Bg7 31.Rb1 Qc6 32.Be6 Qc3 33.Qe2 Qf6 34.Qc4 Qd4 35.Qxd4 Bxd4 36.Rd1 Bc3 37.b5 e3 38.Bc4 Bd2
 21/50    0.00    27. ... Qxb4 28.b3 Rcd8 29.Bc4 Qc5 30.Qe6 Rfe8 31.Qf7 Rf8 32.Qe6
---------------------------------------------------------------------------        
 22/50    0.00    27. ... Rc2 28.Bc4 Bxb2 29.Rd2 Rxd2 30.Qxd2 Bg7 31.Rb1 Qd4 32.Qxd4 Bxd4 33.Rd1 Bc3 34.b5 Rc8 35.Be6 Re8 36.Bc4 Rc8
 22/50    0.00    27. ... Qxb4 28.b3 Rcd8 29.Rg1 Qc5 30.Bc4 Qxd5 31.Rxd5 Bc3 32.g4 fxg4 33.Rxg4 Rf6 34.Kg2 Rdf8 35.Rg3 Bb4 36.f5 Bc5 37.Rg4 e3 38.Rf4 Re8
---------------------------------------------------------------------------        
 23/50    -0.25    27. ... Qxb4 28.b3 e3 29.Qe6 Rce8 30.Qxd6 Qxb3 31.Rfe1 Qc2 32.Qd3 Qc7 33.Bh5 Qxf4 34.Rf1 Qe4 35.Bxe8 e2 36.Bb5 Qxd3 37.Bxd3 exf1Q+ 38.Bxf1 Be5 39.Rd7 Bg7 40.Rc7
 23/50    0.00    27. ... Rc2 28.Bc4 Bxb2 29.Rd2 Rxd2 30.Qxd2 Bg7 31.Rb1 Qd4 32.Qxd4 Bxd4 33.Rd1 Bc3 34.b5 Rc8 35.Be6 Re8 36.Bc4 Rc8
---------------------------------------------------------------------------        
 24/56    -0.06    27. ... Qxb4 28.b3 e3 29.Qf3 Qe4 30.Rxd6 Rc2 31.Rg1 Bc3 32.Rc6 Rxe2 33.Rxc3 Qxf3 34.gxf3 Re8 35.b4 Rb2 36.Re1 Kg7 37.Rexe3 Rxe3 38.Rxe3 Rxb4 39.Kg2 Rxf4 40.Re7+ Kg6
 24/56    0.00    27. ... Rc2 28.Bc4 Bxb2 29.Rd2 Rxd2 30.Qxd2 Bg7 31.Rb1 Qd4 32.Qxd4 Bxd4 33.Rd1 Bc3 34.b5 Rc8 35.Be6 Re8 36.Bc4 Rc8
---------------------------------------------------------------------------        
 25/56    -0.16    27. ... Qxb4 28.b3 e3 29.Qf3 Qe4 30.Rxd6 Rc2 31.h3 Bb2 32.Kh2 Rg8 33.Rd3 Bc1 34.Rd5 Qxf3 35.Bxf3 e2 36.Rxc1 Rxc1 37.Bxe2 Rc2 38.Bf3 Rf8 39.Re5 Kg7 40.Bd5 Rf6 41.Re7+ Kg6 42.Bc4 h6 43.Kg3
 25/56    -0.09    27. ... Rc2 28.Bc4 Bxb2 29.Rd2 Rxd2 30.Qxd2 Bg7 31.Rb1 Qd4 32.Qxd4 Bxd4 33.Rd1 Bc3 34.b5 Rc8 35.Bf1 Bb4 36.Rb1 Bc5 37.b6 Kg7 38.b7 Rb8 39.g3 Kf6 40.Bc4 Ke7 41.Kg2
---------------------------------------------------------------------------        
 26/56    -0.19    27. ... Rc2 28.Bc4 Bxb2 29.Rd2 Rxd2 30.Qxd2 Bg7 31.Rb1 Qd4 32.Qxd4 Bxd4 33.g3 Kg7 34.Rd1 Bc3 35.b5 Rc8 36.Bf1 Bb4 37.Rb1 Bc5 38.b6 Rb8 39.b7 Kf6 40.Bc4 Ke7 41.Kg2 Kd7 42.Bg8 h6 43.Bh7 Kc7 44.Bxf5 d5 45.Rb5 Kc6
 26/56    0.00    27. ... Qxb4 28.b3 e3 29.Qf3 Qe4 30.Rxd6 Rc2 31.h3 Bb2 32.Qh5 Rd2 33.Rh6 Qe7 34.Bf3 Bd4 35.Re1 Qg7 36.Re6 Qd7 37.Ra6 Qe7 38.Qh6 Re8 39.Bc6 Rf8 40.Bf3
---------------------------------------------------------------------------        
 27/56    0.00    27. ... Rc2 28.Bc4 e3 29.Qe6 Qc6 30.Bd5 Re8 31.Qf7 Qb5 32.Rfe1 Rf8 33.Qe6 Re8 34.Qxd6 e2 35.Ra1 Bf8 36.Qf6+ Bg7 37.Qd6
 27/56    0.00    27. ... Qxb4 28.b3 Ra8 29.Bc4 Ra2 30.h3 Bc3 31.Qc6 Qc5 32.Rxd6 Qe3 33.Rd7 Qg3 34.Rg1 Qxf4 35.Rf7 Rxf7 36.Qe8+ Kg7 37.Qxf7+ Kh6 38.Qe6+ Kg5 39.Rf1 Rf2 40.Qg8+ Kh6
---------------------------------------------------------------------------        
 28/57    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.h3 d5 32.Bxd5 Qb6 33.Qe7 Qf6 34.Qxf6+ Bxf6 35.Bc4 Bh4 36.Rd5 Bg3 37.Re5 Kg7 38.Re7+ Kh8 39.Bd5 Rb2 40.Bc4 Rc2
 28/57    0.00    27. ... Rc2 28.Bc4 e3 29.Qe6 Qc6 30.Bd5 Re8 31.Qf7 Qb5 32.Rfe1 Rf8 33.Qe6 Re8 34.Qxd6 e2 35.Rb1 Bf8 36.Qf6+ Bg7 37.Qd6
---------------------------------------------------------------------------        
 29/58    -0.28    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.h3 d5 32.Bxd5 Qb6 33.Qd7 Qa7 34.Bb7 Bg7 35.Qe7 Qb6 36.Rd7 Qg6 37.Rg1 Qf6 38.Qxf6 Bxf6 39.g4 Rc3 40.Kh2 Rxb3 41.Rg2 Rb8 42.Bd5 Rb2
 29/58    0.00    27. ... Rc2 28.Bc4 e3 29.Qe6 Qc6 30.Bd5 Re8 31.Qf7 Qb5 32.Rfe1 Rf8 33.Qe6 Re8 34.Qxd6 e2 35.Rb1 Bf8 36.Qf6+ Bg7 37.Qd6
---------------------------------------------------------------------------        
 30/61    -0.12    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Rxd5 Qf2 36.Rd1 e3 37.Qb5 Qxf4 38.Be2 Qe5 39.Qd3 Qc3 40.Rf1 Qxd3 41.Rxf8+ Bxf8 42.Bxd3 Bc5 43.g3 Kg7 44.Kg2 h5 45.Kf3 Kh6 46.h4 Kg7
 30/61    -0.05    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.Qe7 d5 32.Qxc5 Bxc5 33.Rxd5 Bb4 34.g4 fxg4 35.Re5 Rd8 36.Rg1 e3 37.Rxg4 Rd1+ 38.Rg1 Rxg1+ 39.Kxg1 Bd6 40.Rg5 h6 41.Rg8+ Kh7 42.Bd3+ Kxg8 43.Bxc2 Bxf4 44.h3 Kf7 45.Kg2 Bd6 46.Kf3 Bc5 47.Bd3 Kf6 48.Kf4 Kf7 49.Ke4 Kf6
---------------------------------------------------------------------------        
 31/63    -0.13    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf8 37.Qg5 Bd4 38.Qe7 Bg7 39.Rd8 Qf2 40.Rxf8+ Bxf8 41.Qe5+ Bg7 42.Qf5 Qxf5 43.Bxf5 e3 44.Kg2 Bd4 45.Kf3 Kg7 46.Be4 h6 47.Bd3 Bc5 48.Be2 Kf6 49.Kf4 Kg6 50.Bf3
 31/63    -0.01    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.Qe7 d5 32.Qxc5 Bxc5 33.Rxd5 Bb4 34.g4 fxg4 35.Re5 Kg7 36.Rxe4 Bd6 37.h3 Ra8 38.Rfe1 gxh3 39.R1e2 Rxe2 40.Bxe2 Rf8 41.Kh2 Rxf4 42.Rxf4 Bxf4+ 43.Kxh3 Bc7 44.Bd3 h5 45.Kh4 Kh6 46.b4 Bb6 47.Kh3 Kg7
---------------------------------------------------------------------------        
 32/63    -0.15    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.Qe7 d5 32.Qxc5 Bxc5 33.Rxd5 Bb4 34.Re5 Bc3 35.Re7 Bf6 36.Re6 Kg7 37.g4 fxg4 38.Rxe4 Rd8 39.Re2 Rdd2 40.Rfe1 h5 41.Kg2 Rxe2+ 42.Rxe2 Rxe2+ 43.Bxe2 Bc3 44.h3 gxh3+ 45.Kxh3 Bd2 46.f5 Kf6 47.Bd3 Kg5 48.Kh2 Bf4+
 32/63    -0.15    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf8 37.Qg5 Bd4 38.Qe7 Bg7 39.Rd8 Qf2 40.Rxf8+ Bxf8 41.Qe5+ Bg7 42.Qf5 Qxf5 43.Bxf5 e3 44.Kg2 Bd4 45.Kf3 Kg7 46.Bd3 h5 47.Ke4 Bc5 48.Be2 h4 49.gxh4 Kh7 50.Kf3 Kg7
---------------------------------------------------------------------------        
 33/63    -0.15    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.Qe7 d5 32.Qxc5 Bxc5 33.Rxd5 Bb4 34.Re5 Bc3 35.Re7 Bf6 36.Re6 Kg7 37.g4 fxg4 38.Rxe4 Rd8 39.Re2 Rdd2 40.Rfe1 h5 41.Kg2 Rxe2+ 42.Rxe2 Rxe2+ 43.Bxe2 Bc3 44.h3 gxh3+ 45.Kxh3 Bd2 46.Kg3 h4+ 47.Kg4 h3
 33/63    -0.15    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Rxd5 Qc4 36.Rd1 e3 37.Qe7 Qxf4 38.Be2 Qe5 39.Qb4 Qf6 40.Qg4 Qe5 41.Rf1 Rxf1+ 42.Bxf1 Qf6 43.Qd1 Qd4 44.Qf3 Qf6 45.Qxf6 Bxf6 46.g3 Bd4 47.Kg2 Kg7 48.Kf3 Kf6
---------------------------------------------------------------------------        
 34/72    -0.15    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Rxd5 Qc4 36.Rd1 e3 37.Qe7 Qxf4 38.Be2 Qe5 39.Qb4 Qf6 40.Qg4 Qe5 41.Rf1 Rxf1+ 42.Bxf1 Qf6 43.Qd1 Qd4 44.Qf3 Qf6 45.Qxf6 Bxf6 46.g3 Kg7 47.Kg2 h5 48.Bd3 Kh6 49.Kf3 h4 50.Ke2
 34/72    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.Rc1 Rd2 32.Bd5 Bc3 33.Qe7 Rc8 34.Be6 Qc7 35.Qg5 Rf8 36.Bxf5 Rd5 37.Qg3 Rdxf5 38.Rxc3 Qf7 39.Rc6 Rxf4 40.Qc3+ Kg8 41.Qg3+ Kh8
---------------------------------------------------------------------------        
 35/72    -0.15    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Rxd5 Qf2 36.Rd1 e3 37.Qb5 Qxf4 38.Be2 Qe5 39.Qc4 Rf2 40.Rf1 Rxf1+ 41.Bxf1 Qf6 42.Qd3 Qd4 43.Qf5 Qf6 44.Qxf6 Bxf6 45.g3 Kg7 46.Kg2 h5 47.Kf3 Bd4 48.Bd3 Kf6 49.Ke4 Bb6
 35/72    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.Rc1 Rd2 32.Bd5 Bc3 33.Qe7 Rc8 34.Be6 Qc7 35.Qg5 Rf8 36.Bxf5 Rd5 37.Qg3 Rdxf5 38.Rxc3 Qf7 39.Rc6 Rxf4 40.Qc3+ Kg8 41.Qg3+ Kh8
---------------------------------------------------------------------------        
 36/72    -0.15    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Rxd5 Qf2 36.Rd1 e3 37.Qb5 Qxf4 38.Be2 Qe5 39.Qc4 Rf2 40.Rf1 Rxf1+ 41.Bxf1 Qf6 42.Qd3 Qd4 43.g3 Qxd3 44.Bxd3 Bf8 45.Kg2 Kg7 46.Kf3 h5 47.Kxe3 Bd6 48.Kf3 h4 49.Kf2 hxg3+ 50.hxg3 Bc5+ 51.Kf3 Bg1 52.Kg2 Be3 53.Kf3 Bc1
 36/72    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Bb5 Re7 34.Bc4 Re8
---------------------------------------------------------------------------        
 37/77    -0.15    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Rxd5 Qf2 36.Rd1 e3 37.Qb5 Qxf4 38.Be2 Qe5 39.Qb4 Qf6 40.Qc4 Qc3 41.Qg4 Qe5 42.Kg1 Rf2 43.Rf1 Qf6 44.Qc8+ Qf8 45.Qxf8+ Rxf8 46.g3 Rxf1+ 47.Kxf1 Bd4 48.Kg2 Kg7 49.Kf3 Bc5 50.Bd3 h5 51.Be2 Kf6
 37/77    -0.08    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Bb5 Re7 34.Rc6 e3 35.Be2 Rxe2 36.Rxc3 h5 37.b4 Rf2 38.Rb1 Rxf4 39.Kg1 Rfe4 40.b5 e2 41.Re1 Kg7 42.Kf2 R4e5 43.Rc6 Rxb5 44.Rxe2 Rxe2+ 45.Kxe2 Rb3 46.h3 h4 47.Kf2 Rb2+ 48.Kf3 Rb4 49.Re6
---------------------------------------------------------------------------        
 38/77    -0.15    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Rxd5 Qf2 36.Rd1 e3 37.Qb5 Qxf4 38.Be2 Qe5 39.Qb4 Qf6 40.Qc4 Qc3 41.Qg4 Qe5 42.Kg1 Rf2 43.Rf1 Qf6 44.Qc8+ Qf8 45.Qxf8+ Rxf8 46.g3 Rxf1+ 47.Kxf1 Bd4 48.Kg2 Kg7 49.Kf3 Bc5 50.Bd3 h5 51.Be2
 38/77    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Bb5 Re7 34.Rd8+ Kg7 35.Bc4 Bb4 36.Rg8+ Kf6 37.Rb8 Bd2 38.g3 e3 39.Rf8+ Kg6 40.Rg8+ Kf6 41.Rf8+
---------------------------------------------------------------------------        
 39/77    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 39/77    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 40/79    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 40/79    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 41/82    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 41/82    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.h3 d5 32.Bxd5 Qc3 33.Qe7 Bc5 34.Qc7 Qb2 35.Rb1 Qc3 36.Rbe1 Bb4 37.Qxc3+ Bxc3 38.Rc1 Rxc1 39.Rxc1 Bd2 40.Rf1 h5 41.g3 Kg7 42.Kg2 Rd8 43.Bc4 h4 44.gxh4 Kg6 45.Kg3 Rd6 46.Rh1 Kh6 47.Rd1 Rg6+ 48.Kf2 Bxf4 49.Rd5 Rf6 50.Be2 Bb8 51.Ke3
---------------------------------------------------------------------------        
 42/82    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 42/82    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 43/82    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 43/82    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 44/82    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 44/82    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 45/83    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 45/83    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 46/86    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 46/86    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 47/88    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 47/88    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 48/97    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 48/97    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 49/97    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 49/97    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
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Old 2017-02-28, 15:33   #8
The Carnivore
 
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Quote:
Originally Posted by dh1 View Post
I've not been saving analysis runs, but re-ran a two variation . I have been unable to confirm Qxb4 being inferior as in my previous Houdini-post with any engines.
Code:
 
---------------------------------------------------------------------------        
 40/79    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 40/79    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 41/82    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 41/82    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qe6 Bd4 31.h3 d5 32.Bxd5 Qc3 33.Qe7 Bc5 34.Qc7 Qb2 35.Rb1 Qc3 36.Rbe1 Bb4 37.Qxc3+ Bxc3 38.Rc1 Rxc1 39.Rxc1 Bd2 40.Rf1 h5 41.g3 Kg7 42.Kg2 Rd8 43.Bc4 h4 44.gxh4 Kg6 45.Kg3 Rd6 46.Rh1 Kh6 47.Rd1 Rg6+ 48.Kf2 Bxf4 49.Rd5 Rf6 50.Be2 Bb8 51.Ke3
---------------------------------------------------------------------------        
 42/82    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 42/82    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 43/82    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 43/82    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 44/82    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 44/82    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 45/83    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 45/83    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 46/86    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 46/86    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 47/88    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 47/88    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 48/97    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 48/97    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
---------------------------------------------------------------------------        
 49/97    0.00    27. ... Rc2 28.Rd2 Rxd2 29.Qxd2 Rd8 30.Qd5 Qxb4 31.Qxf5 d5 32.Rd1 Qxb2 33.Bg4 Qc2 34.Qg5 Rf8 35.Qxd5 Rxf4 36.g3 Rf2 37.Qd8+ Bf8 38.Qd4+ Bg7 39.Qd8+
 49/97    0.00    27. ... Qxb4 28.b3 Rc2 29.Bc4 Qc5 30.Qxd6 Qxd6 31.Rxd6 Bc3 32.Rfd1 Re8 33.Rd8 Rxd8 34.Rxd8+ Kg7 35.Rd7+ Kg6 36.Rd6+ Kg7 37.Rd7+
Looks like they're pretty much equal. Thanks!

Last fiddled with by The Carnivore on 2017-02-28 at 15:33
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Old 2017-03-01, 01:37   #9
richs
 
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Aug 2002
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If the Queen and Rook moves are rated approximately equal, I'd prefer Qxb4 to even up sooner than later.
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Old 2017-03-01, 07:26   #10
gd_barnes
 
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Quote:
Originally Posted by richs View Post
If the Queen and Rook moves are rated approximately equal, I'd prefer Qxb4 to even up sooner than later.
I agree with that.
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