Interesting BBN vs QPP middlegame sideline

[Nordlandia]

The queen is overdog here. Can white defend ?

White struggles with poor coordination of the minor pieces.

[d]r3k2r/1p6/p2pp2p/6p1/3q4/4NPBP/P3KP2/R4B1R w kq - 0 23

Stockfish recommend this line

[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[PlyCount "48"]

{[#]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Ng4 7. Bg5 h6
8. Bh4 g5 9. Bg3 Bg7 10. h3 Ne5 11. Nf5 Bxf5 12. exf5 Nbc6 13. Nd5 e6 14. fxe6
fxe6 15. Ne3 Qa5+ 16. c3 Nf3+ 17. gxf3 Bxc3+ 18. bxc3 Qxc3+ 19. Ke2 Nd4+ 20.
Qxd4 Qxd4 21. Rd1 Qb2+ 22. Rd2 Qb5+ 23. Ke1 Qb1+ 24. Nd1 O-O *[/pgn]

[peter]

The queen is overdog here. Can white defend ?

White struggles with poor coordination of the minor pieces.

[d]r3k2r/1p6/p2pp2p/6p1/3q4/4NPBP/P3KP2/R4B1R w kq - 0 23

Stockfish recommend this line

[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[PlyCount "48"]

{[#]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Ng4 7. Bg5 h6
8. Bh4 g5 9. Bg3 Bg7 10. h3 Ne5 11. Nf5 Bxf5 12. exf5 Nbc6 13. Nd5 e6 14. fxe6
fxe6 15. Ne3 Qa5+ 16. c3 Nf3+ 17. gxf3 Bxc3+ 18. bxc3 Qxc3+ 19. Ke2 Nd4+ 20.
Qxd4 Qxd4 21. Rd1 Qb2+ 22. Rd2 Qb5+ 23. Ke1 Qb1+ 24. Nd1 O-O *[/pgn]

Fen doesn't fit position at 23rd in .pgn, Jon.

After some Forward- Backward from the Fen, Cfish has, if at all very slow progress in output and about -1 pawn eval.
So I tried Crystal too:

r3k2r/1p6/p2pp2p/6p1/3q4/4NPBP/P3KP2/R4B1R w kq - 0 1

Analysis by Crystal 051220:

23.Rd1 Qa4 24.h4 Kf7 25.a3 Rac8 26.hxg5 hxg5 27.Rxh8 Rxh8 28.Rxd6 Qb5+ 29.Ke1 Rh1 30.Rd2 Qb3 31.Bd6 a5 32.Ke2 Qb5+ 33.Ke1 Ke8 34.Rd1 Qb3 35.Kd2 Kf7 36.Ke2 Qb5+ 37.Ke1 Qb2 38.Rd2 Qc3 39.Ke2 Ke8 40.Rd3 Qb2+ 41.Rd2 Qb5+ 42.Rd3 e5 43.Kd2 Qb2+ 44.Ke1 Rh4 45.Nd1 Qc1 46.Bxe5 Rh1 47.Rc3 Qb1 48.Rc5 a4 49.Bc3 Rxf1+ 50.Kxf1 Qxd1+ 51.Kg2 g4 52.fxg4 Qxg4+ 53.Kf1 Qd1+ 54.Kg2
-/+ (-0.89) Depth: 37/93 00:16:52 9510MN, tb=499470

Seems not impossible, that a fortress could be built up, but probably it's just a won but
YAVLEJ, yet another very long endgame of Jon's.


If I'll have free hardware- ressources in nearer future, I'll try to let it be played out with SF against Crystal maybe.

Season greetings

[Nordlandia]

Stockfish won the game as black but last available Cfish managed to hold this against Lc0. Take the result with grain of salt as the net used can be questioned.

[pgn][Event "?"]
[Site "https://lichess.org/dxpK7VFv"]
[Date "2020.12.29"]
[Round "?"]
[White "Cfish Dev BMI2"]
[Black "lc0-pro"]
[Result "1/2-1/2"]
[WhiteElo "?"]
[BlackElo "?"]
[Variant "From Position"]
[TimeControl "1800+30"]
[ECO "?"]
[Opening "?"]
[Termination "Normal"]
[FEN "r3k2r/1p6/p2pp2p/6p1/3q4/4NPBP/P3KP2/R4B1R w kq - 0 23"]
[SetUp "1"]
[Annotator "lichess.org"]

23. Rd1 Qb2+ 24. Rd2 Qb5+ 25. Ke1 Qb1+ 26. Nd1 O-O 27. Bd3 Qb6 28. Ke2 Qc6 29. Be4 d5 30. Bd3 Rac8 31. Re1 d4 32. Kf1 Qxf3 33. Kg1 Rc1 34. Bc2 Rxc2 35. Rxc2 e5 36. Rce2 Re8 37. Re4 b5 38. Bxe5 d3 39. R4e3 Qd5 40. Nc3 Qc4 41. a3 a5 42. Rd1 b4 43. axb4 axb4 44. Rdxd3 Rxe5 45. Rd8+ Kf7 46. Rxe5 bxc3 47. Rd1 c2 48. Rc1 Qd3 49. Kg2 Qd2 50. Ree1 Kf6 { The game is a draw. } 1/2-1/2[/pgn]

[peter]

Seems not impossible, that a fortress could be built up, but probably it's just a won but
YAVLEJ, yet another very long endgame of Jon's.


If I'll have free hardware- ressources in nearer future, I'll try to let it be played out with SF against Crystal maybe.

12 threads each of 3GHz Xeon CPU, 6men Syzygys:

[pgn][Event "SCHWARZERBLITZ, Schnellschach 45m+5s"]
[Site "SchwarzerBlitz"]
[Date "2020.12.29"]
[Round "1"]
[White "Crystal 051220"]
[Black "CF EXT 081220 x64 SSE41 N"]
[Result "0-1"]
[Annotator "-0.62;-1.57"]
[SetUp "1"]
[FEN "r3k2r/1p6/p2pp2p/6p1/3q4/4NPBP/P3KP2/R4B1R w kq - 0 23"]
[PlyCount "100"]
[TimeControl "2700+5"]

23. Rd1 Qb2+ {[%eval -157,38] [%emt 0:01:34]} 24. Rd2 {[%eval -62,31] [%emt 0:
00:49]} Qb5+ {[%eval -184,36] [%emt 0:00:27]} 25. Ke1 {[%eval -54,30] [%emt 0:
00:01]} Qb1+ {[%eval -169,39] [%emt 0:00:43]} 26. Nd1 {[%eval -55,32] [%emt 0:
00:00]} O-O {[%eval -180,37] [%emt 0:00:34]} 27. Bd3 {[%eval -66,31] [%emt 0:
01:12]} Qb6 {[%eval -110,38] [%emt 0:00:37]} 28. Ke2 {[%eval -74,37] [%emt 0:
02:43]} Qc6 {[%eval -175,43] [%emt 0:00:48]} 29. Be4 {[%eval -51,30] [%emt 0:
00:03]} d5 {[%eval -122,45] [%emt 0:05:42]} 30. Bd3 {[%eval -46,35] [%emt 0:00:
00]} Rac8 {[%eval -120,39] [%emt 0:00:37]} 31. Re1 {[%eval -50,33] [%emt 0:00:
14]} d4 {[%eval -132,40] [%emt 0:00:23]} 32. Kf1 {[%eval -75,33] [%emt 0:00:49]
} Qxf3 {[%eval -112,41] [%emt 0:00:27]} 33. Kg1 {[%eval -55,33] [%emt 0:00:32]}
Rc1 {[%eval -121,39] [%emt 0:00:06]} 34. Bc2 {[%eval -53,32] [%emt 0:01:02]}
Rxc2 {[%eval -150,40] [%emt 0:00:00]} 35. Rxc2 {[%eval -62,32] [%emt 0:02:06]}
e5 {[%eval -127,45] [%emt 0:01:51] (Te8)} 36. Rce2 {[%eval -69,31] [%emt 0:00:
59]} Re8 {[%eval -122,41] [%emt 0:00:14]} 37. Re4 {[%eval -78,32] [%emt 0:01:
05]} d3 {[%eval -105,44] [%emt 0:00:00]} 38. R4e3 {[%eval -82,32] [%emt 0:01:
39]} d2 {[%eval -126,40] [%emt 0:00:08]} 39. R1e2 {[%eval -60,30] [%emt 0:00:
36]} Qd5 {[%eval -137,37] [%emt 0:00:37]} 40. Bxe5 {[%eval -51,30] [%emt 0:00:
09]} a5 {[%eval -168,35] [%emt 0:00:58]} 41. Bc3 {[%eval -63,29] [%emt 0:00:01]
} Rxe3 {[%eval -164,35] [%emt 0:00:47]} 42. fxe3 {[%eval -65,32] [%emt 0:01:22]
} Qxa2 {[%eval -159,36] [%emt 0:00:00]} 43. Rxd2 {[%eval -79,27] [%emt 0:00:43]
} Qa3 {[%eval -174,37] [%emt 0:00:55]} 44. Kf2 {[%eval -75,30] [%emt 0:04:53]
(Kg2)} Qf8+ {[%eval -184,30] [%emt 0:00:29]} 45. Ke2 {[%eval -67,24] [%emt 0:
00:37] (Ke1)} a4 {[%eval -181,32] [%emt 0:00:36]} 46. e4 {[%eval -123,29]
[%emt 0:07:12] (Sf2)} a3 {[%eval -113,41] [%emt 0:03:12] (Dc8)} 47. Ne3 {
[%eval -81,24] [%emt 0:00:27]} Qc5 {[%eval -165,36] [%emt 0:00:17] (Dc8)} 48.
Rd8+ {[%eval -99,27] [%emt 0:01:26]} Kf7 {[%eval -127,37] [%emt 0:00:08]} 49.
Kd3 {[%eval -87,29] [%emt 0:01:38] (Kd2)} Qb5+ {[%eval -185,37] [%emt 0:00:39]}
50. Kd2 {[%eval -96,27] [%emt 0:00:17]} a2 {[%eval -185,36] [%emt 0:01:41]} 51.
Ra8 {[%eval -107,30] [%emt 0:00:00] (Td5)} Qd7+ {[%eval -208,36] [%emt 0:00:35]
} 52. Kc2 {[%eval -118,28] [%emt 0:00:00]} Qe6 {[%eval -208,38] [%emt 0:01:48]}
53. Kd3 {[%eval -121,29] [%emt 0:00:00]} h5 {[%eval -218,38] [%emt 0:00:36]}
54. Ra5 {[%eval -111,27] [%emt 0:00:12] (Ta7)} Kg6 {[%eval -218,45] [%emt 0:00:
30] (Db3)} 55. Ra8 {[%eval -74,27] [%emt 0:00:39]} h4 {[%eval -226,36] [%emt 0:
00:11]} 56. Ng4 {[%eval -112,27] [%emt 0:00:45]} Kf7 {[%eval -235,41] [%emt 0:
01:01] (Db3)} 57. Ra5 {[%eval -110,33] [%emt 0:00:28]} Qd6+ {[%eval -243,42]
[%emt 0:00:22] (Db3)} 58. Kc2 {[%eval -80,28] [%emt 0:00:36] (Ld4)} Qg3 {
[%eval -264,31] [%emt 0:00:31]} 59. Rxa2 {[%eval -125,27] [%emt 0:02:15]} Qxh3
{[%eval -319,35] [%emt 0:00:00]} 60. Ne5+ {[%eval -134,30] [%emt 0:00:41]} Ke7
{[%eval -375,31] [%emt 0:00:09] (Ke6)} 61. Ra8 {[%eval -220,25] [%emt 0:01:10]
(Tb2)} Qh1 {[%eval -400,31] [%emt 0:00:33]} 62. Bb4+ {[%eval -203,23] [%emt 0:
00:09]} Kf6 {[%eval -455,31] [%emt 0:00:31]} 63. Ng4+ {[%eval -305,25] [%emt 0:
00:39]} Kf7 {[%eval -621,35] [%emt 0:03:24]} 64. Nf2 {[%eval -404,27] [%emt 0:
00:42]} Qg2 {[%eval -643,28] [%emt 0:00:02]} 65. Rf8+ {[%eval -484,26] [%emt 0:
01:29]} Ke6 {[%eval -736,30] [%emt 0:00:00] (Kg7)} 66. Bd2 {[%eval -493,23]
[%emt 0:01:13]} Kd7 {[%eval -795,29] [%emt 0:00:00]} 67. Rf5 {[%eval -500,22]
[%emt 0:02:06] (Kc3)} g4 {[%eval -904,26] [%emt 0:00:23]} 68. Kc3 {[%eval -799,
23] [%emt 0:02:06] (Td5+)} h3 {[%eval -1076,27] [%emt 0:00:34]} 69. Rd5+ {
[%eval -649,20] [%emt 0:00:23]} Kc8 {[%eval -1137,30] [%emt 0:02:08]} 70. Rc5+
{[%eval -1081,22] [%emt 0:00:00]} Kd7 {[%eval -1139,27] [%emt 0:01:13] (Kb8)}
71. Rd5+ {[%eval -1166,21] [%emt 0:00:46]} Kc8 {[%eval -1126,27] [%emt 0:00:10]
} 72. Rc5+ {[%eval -1177,18] [%emt 0:00:03]} Kb8 {[%eval -1165,29] [%emt 0:00:
17]} 0-1
[/pgn]

[Nordlandia]

Thanks Peter. If you want the last cfish.

Chess2u has a cfish thread. Bookmark it for convenience

https://pixeldrain.com/u/qZtPbsLG

https://www.chess2u.com/t11930p375-cfish#101962

[peter]

Thanks Peter. If you want the last cfish.

Chess2u has a cfish thread. Bookmark it for convenience

https://pixeldrain.com/u/qZtPbsLG

https://www.chess2u.com/t11930p375-cfish#101962

Thanks, Jon, got the latest one compiled already yesterday at Outskirts.