LC0 uses positional skills to "Lock Down" Gull 3

[supersharp77]

Excellent game for LC0 showing positional prowess vs a strong engine opponent...small net was used....no time control issues...solid and strong play...observed in real time...can LC0 make noise in the upcoming World KO Champs? An important moment ....can stellar positional skills overcome tactical shortcomings?...We shall see...

[Event "World Engs Swiss Champs 2020"]
[Site "SW USA"]
[Date "2020.06.18"]
[Round "5"]
[White "Lc0 v0.21.1(orig)"]
[Black "Gull 3 x64 (syzygy)"]
[Result "1-0"]
[ECO "A31"]
[WhiteElo "2800"]
[BlackElo "2800"]
[Annotator "Ross-SF Ipman SE3"]
[PlyCount "103"]
[EventDate "2020.06.06"]
[Source "AAR"]
[TimeControl "40/300+10:30/120+10:60+10"]


[pgn]{Intel(R) Core(TM)2 Duo CPU T6670 @ 2.20GHz 0 MHz W=5.7 ply; 0kN/s; Kasparov.
ctg B=15.5 ply; 591kN/s; D-4.ctg} 1. d4 {[%eval 0,0] [%emt 0:00:00]} Nf6 {
[%eval 0,0] [%emt 0:00:00]} 2. c4 {[%eval 0,0] [%emt 0:00:00]} g6 {
[%eval 0,0] [%emt 0:00:00]} 3. Nf3 {[%eval 0,0] [%emt 0:00:00]} c5 !? {
Benoni Gambit...a complicated flank attack for Black... [%eval 36,16] [%emt 0:
00:20]} 4. d5 {(e3) [%eval 93,5] [%emt 0:00:16]} a6 $6 {
(Bg7) [%eval 51,15] [%emt 0:00:15]} (4... b5! {The correct play...or e6.....} 5. cxb5
a6) 5. a4 ! {(Nc3) [%eval 102,6] [%emt 0:00:21]} a5 {
(Bg7) [%eval 49,16] [%emt 0:00:16]} 6. Nc3 {[%eval 120,6] [%emt 0:00:25]} Na6 {
(d6) [%eval 56,18] [%emt 0:00:21]} 7. e4 {[%eval 120,6] [%emt 0:00:24]} d6 {
[%eval 56,16] [%emt 0:00:01]} 8. h3 {(Be2) [%eval 114,6] [%emt 0:00:20]} Nb4 {
[%eval 49,19] [%emt 0:00:28]} 9. Bf4 {(Be2) [%eval 124,5] [%emt 0:00:20]} Bg7 {
[%eval 45,17] [%emt 0:00:24]} 10. Be2 {[%eval 134,5] [%emt 0:00:16]} h6 {
(0-0) [%eval 47,18] [%emt 0:00:20]} 11. Qd2 {(0-0) [%eval 184,5] [%emt 0:00:18]
} g5 {[%eval 46,17] [%emt 0:00:31]} 12. Bh2 {[%eval 186,6] [%emt 0:00:17]} Kf8
{(g4) [%eval 52,16] [%emt 0:00:52]} (12... O-O 13. O-O {With a slight plus....}
) 13. e5 {(Rc1) [%eval 326,6] [%emt 0:00:22]} dxe5 {
[%eval 29,14] [%emt 0:00:04]} 14. Nxe5 {(Bxe5) [%eval 339,6] [%emt 0:00:18]} h5
{(Nd7) [%eval 49,14] [%emt 0:00:10]} 15. O-O {[%eval 330,6] [%emt 0:00:24]} Bh6
{(g4) [%eval 43,16] [%emt 0:01:15]} 16. Nb5 {(Qd1) [%eval 332,6] [%emt 0:00:26]
} g4 {(Ra6) [%eval 32,12] [%emt 0:00:08]} 17. Bf4 {
(Qc3) [%eval 385,7] [%emt 0:00:14]} Bxf4 {[%eval -13,14] [%emt 0:00:11]} 18.
Qxf4 {[%eval 341,8] [%emt 0:00:13]} gxh3 {[%eval -4,14] [%emt 0:00:11]} 19. g3
! {(Rad1) [%eval 315,6] [%emt 0:00:28]} (19. Rad1 hxg2 20. Kxg2 Rg8+ 21. Kh1)
19... Ra6 {[%eval 0,13] [%emt 0:00:13]} 20. Rad1! {
A quiet move....... [%eval 306,5] [%emt 0:00:20]} Bd7 {
(Rh7) [%eval 37,14] [%emt 0:00:27]} 21. Kh2 {(Nxd7+)...LC0 eval showed a big
advantage..4.46...fantastic attacking position for white here... [%eval 446,5]
[%emt 0:00:23]} Bxb5 {[%eval 65,15] [%emt 0:01:09]} (21... Rh7 22. Bf3) 22.
axb5 {[%eval 408,6] [%emt 0:00:13]} Rd6 {[%eval 81,17] [%emt 0:00:26]} 23. Rd2
{(Kxh3) [%eval 463,5] [%emt 0:00:18]} Rh7 {[%eval 53,13] [%emt 0:00:18]} 24.
Bf3 {
(Kxh3) Whites e5 knight dominates the board... [%eval 479,5] [%emt 0:00:23]} e6
{(Nd7) [%eval 53,14] [%emt 0:00:18]} (24... a4 25. Re2 Qa5 26. Rfe1 Kg8) 25.
Rfd1 {(Kxh3) [%eval 650,7] [%emt 0:00:15]} exd5 {[%eval 58,11] [%emt 0:00:03]}
26. cxd5 {[%eval 603,7] [%emt 0:00:15]} Ng4+ {[%eval 80,13] [%emt 0:00:08]} 27.
Bxg4 {[%eval 815,7] [%emt 0:00:18]} hxg4 {[%eval 108,13] [%emt 0:00:04]} 28.
Qxg4 {[%eval 784,6] [%emt 0:00:21]} Rg7 {(Rhh6) [%eval 99,15] [%emt 0:00:13]}
29. Qe4 {(Qxh3) [%eval 862,6] [%emt 0:00:24]} (29. Qxh3 Kg8 30. Kg2 Nxd5 $1 {
threat nf4 check!}) 29... Qe7 {[%eval 118,14] [%emt 0:00:12]} 30. f4 ! {
(Re2) [%eval 877,6] [%emt 0:00:20]} Kg8 {(f6) [%eval 65,14] [%emt 0:00:12]} 31.
Qf3 {(Re1) [%eval 1054,6] [%emt 0:00:19]} Qe8 {
(Qd8) [%eval 87,14] [%emt 0:00:28]} 32. Nc4 {[%eval 728,5] [%emt 0:00:16]} Rd8
{(Rdg6) [%eval 89,16] [%emt 0:00:12]} (32... Rdg6 33. d6 $1) (32... Rd7 33. Re2
) 33. Ne3 {(d6) [%eval 1265,5] [%emt 0:00:18]} Qd7 {
(Qxb5) [%eval 136,14] [%emt 0:00:17]} (33... Qxb5 34. Nf5 Rg6 35. Ne7+) 34. d6
{(Qh5) [%eval 1340,5] [%emt 0:00:20]} Re8 {(c4) [%eval 129,11] [%emt 0:00:07]}
(34... Qxb5 35. Nf5) (34... b6 {
White slowly crushes black positionally...move by move...} 35. g4 !) 35. f5 {
(g4) [%eval 1509,5] [%emt 0:00:18]} f6 {[%eval 303,12] [%emt 0:00:10]} 36. Ng4
! {[%eval 1904,5] [%emt 0:00:12]} Rf8 {[%eval 343,14] [%emt 0:00:14]} 37. Re2
{(Qe4) [%eval 1662,5] [%emt 0:00:20]} Qxb5 {
Black runs out of useful moves.. [%eval 330,12] [%emt 0:00:08]} 38. Nh6+ {
[%eval 853,5] [%emt 0:00:16]} Kh7 {[%eval 450,15] [%emt 0:00:12]} 39. Qh5 {
[%eval 729,6] [%emt 0:00:14]} Qxe2+ {(Nc6) [%eval 450,15] [%emt 0:00:01]} 40.
Qxe2 {[%eval 3631,5] [%emt 0:00:11]} Kxh6 {[%eval 450,14] [%emt 0:00:00]} 41.
d7 {(Kxh3) [%eval 3356,5] [%emt 0:00:25]} Nc6 {[%eval 512,15] [%emt 0:00:16]}
42. Qe8 {(Rd6) [%eval 1857,5] [%emt 0:00:19]} Rgg8 {
[%eval 423,14] [%emt 0:00:26]} 43. Qe6 {[%eval 2071,6] [%emt 0:00:19]} Kh7 {
(Kg7) [%eval 423,15] [%emt 0:00:05]} (43... Nd8 44. Qb6 Kg7 45. Qxc5 Kh6 46.
Rd6 Kg7 47. Qxa5 Kh6 48. Qd5 Kg7 49. Re6) 44. Rd6 {
[%eval 2658,5] [%emt 0:00:18]} a4 {(Nd8) [%eval 423,14] [%emt 0:00:00]} 45.
Kxh3 {[%eval 1909,5] [%emt 0:00:20]} Nd8 {(Rg7) [%eval 458,16] [%emt 0:00:14]}
46. Qe7+ {(Qe3) [%eval 2671,5] [%emt 0:00:18]} Rf7 {
[%eval 440,13] [%emt 0:00:06]} 47. Qe8 {(Qe4) [%eval 2587,5] [%emt 0:00:17]} b5
{(Kg7) [%eval 419,15] [%emt 0:00:20]} 48. Kg2 {
(Qe3) [%eval 2394,4] [%emt 0:00:18]} b4 {(Kg7) [%eval 437,15] [%emt 0:00:14]}
49. Ra6 {(Qe3) [%eval 2500,4] [%emt 0:00:17]} Rgf8 {
(a3) [%eval 755,15] [%emt 0:00:07]} 50. Ra8 {[%eval 4872,4] [%emt 0:00:16]} Nb7
{(Kg7) [%eval 1037,20] [%emt 0:00:28]} 51. Qxf8 {[%eval 3822,4] [%emt 0:00:15]}
Rxf8 {[%eval 1078,19] [%emt 0:00:13]} 52. Rxf8 {A positional masterpiece...
gull suffers in a passive position vs LC0.... [%eval 3000,6] [%emt 0:00:11]}
1-0

[/pgn]

[MikeGL]

Thanks for that entertaining game.
here's another one where SF11 was crushed in a B vs R exchange sacrifice of Lc0. Don't know where SF11 made mistake but it reported +5 eval then after a few moves realized SFs own eval was wrong, SF was actually losing.

[pgn]
[Event "?"]
[Site "?"]
[Date "2020.06.15"]
[Round "323"]
[White "Stockfish11_20041220"]
[Black "Lc0"]
[Result "0-1"]
[TimeControl "40/0:300"]
[Termination "adjudication"]
[PlyCount "115"]
[WhiteType "human"]
[BlackType "human"]

1. c4 {book} Nf6 {book} 2. Nc3 {book} g6 {book} 3. g3 {book} Bg7 {book} 4.
Bg2 {book} O-O {book} 5. d3 {book} c5 {book} 6. Bg5 {book} Nc6 {book} 7.
Qd2 {book} Nd4 {book} 8. h4 {book} h5 {book} 9. e3 {+0.75/17 0.65s} Nc6
{-0.16/7 0.28s} 10. Bxf6 {+0.96/14 0.078s} Bxf6 {-0.34/9 0.21s} 11. Ne4
{+1.00/16 0.12s} d6 {-0.36/9 0.28s} 12. Nxf6+ {+1.06/16 0.14s} exf6
{-0.39/9 0.23s} 13. Ne2 {+1.22/16 0.19s} Bg4 {-0.37/8 0.36s} 14. Nc3
{+1.22/18 0.22s} Ne5 {-0.36/9 0.23s} 15. O-O {+1.24/16 0.12s} Kg7 {-0.34/8
0.23s} 16. b3 {+1.17/20 0.57s} Nf3+ {-0.30/11 0.27s} 17. Bxf3 {+1.23/15
0.090s} Bxf3 {-0.30/10 0.23s} 18. e4 {+1.31/15 0.13s} Qd7 {-0.32/9 0.33s}
19. Kh2 {+1.48/17 0.13s} Rae8 {-0.35/9 0.50s} 20. Rae1 {+1.47/16 0.18s} Qg4
{-0.32/8 0.21s} 21. Nd5 {+2.26/16 0.16s} b6 {-0.35/8 0.49s} 22. b4
{+2.55/21 0.85s} Rh8 {-0.37/6 0.37s} 23. b5 {+2.39/19 0.56s} g5 {-0.50/6
0.32s} 24. Ne3 {+2.50/19 0.47s} Qd7 {-0.49/7 0.22s} 25. a4 {+2.52/16 0.12s}
Re5 {-0.43/6 0.25s} 26. a5 {+2.98/17 0.18s} Rg8 {-0.44/7 0.29s} 27. axb6
{+3.20/17 0.63s} axb6 {-0.51/7 0.21s} 28. Nd5 {+3.12/20 0.44s} Qg4 {-0.42/7
0.39s} 29. Rg1 {+3.24/18 0.20s} Rxd5 {-0.43/7 0.28s} 30. exd5 {+3.34/19
0.21s} Kg6 {-0.59/7 0.50s} 31. Re7 {+4.19/18 0.16s} Ra8 {-0.75/7 0.21s} 32.
Rb7 {+4.46/19 0.16s} Qd4 {-0.69/6 0.47s} 33. Rxb6 {+5.73/18 0.21s} Re8
{-0.86/8 0.21s} 34. Rxd6 {-0.91/24 1.2s} gxh4 {+0.33/6 0.22s} 35. Rg2
{-0.67/22 0.092s} h3 {+0.30/8 0.25s} 36. Kxh3 {-0.76/23 0.27s} Qa1 {+0.39/9
0.21s} 37. Rh2 {-0.74/24 0.23s} Re5 {+0.59/10 0.26s} 38. Kh4 {-0.19/22
0.35s} Qg1 {+0.50/11 0.34s} 39. Rh3 {0.00/22 0.20s} Bg4 {+0.51/12 0.21s}
40. f4 {+0.40/22 0.60s} Re2 {-0.48/7 0.53s} 41. Qc3 {+2.24/19 0.17s} Be6
{+0.50/8 0.56s} 42. dxe6 {-5.99/23 1.8s} Rh2 {+2.26/8 0.48s} 43. Qxf6+
{-4.68/23 0.42s} Kxf6 {+5.28/9 0.61s} 44. exf7+ {-6.72/22 0.31s} Kxf7
{+5.76/8 0.52s} 45. Rxh2 {-6.64/20 0.17s} Qxh2+ {+5.33/10 0.49s} 46. Kg5
{-6.64/1 0s} Qxg3+ {+6.05/8 0.44s} 47. Kf5 {-6.91/20 0.24s} Ke7 {+7.70/7
1.2s} 48. Rg6 {-7.66/21 1.7s} Qxd3+ {+10.67/6 0.62s} 49. Kg5 {-7.45/17
0.15s} Qxc4 {+10.72/5 1.0s} 50. b6 {-9.40/18 0.98s} Kd7 {+11.42/5 0.35s}
51. f5 {-7.52/17 0.25s} Qc1+ {+9.40/5 0.52s} 52. Kxh5 {-6.86/14 0.048s} Qf4
{+9.78/5 0.41s} 53. Rg7+ {-7.14/23 0.36s} Kc6 {+10.91/5 0.26s} 54. Rf7
{-11.54/16 0.29s} Kxb6 {+25.97/5 0.37s} 55. Rf6+ {-47.97/19 0.62s} Kc7
{+38.28/5 0.33s} 56. Rf7+ {-12.85/24 0.20s} Kd6 {+35.29/5 0.25s} 57. Kg6
{-24.51/20 0.33s} Qf3 {+37.10/4 0.23s} 58. Rf6+ {-12.33/16 0.15s, Black
wins by adjudication} 0-1
[/pgn]

Giving away couple of pawns against the dreaded SF11 is no joke, but here Lc0 just did it and still won.
Excellent light square domination on K side of SF which proves fatal.

[MikeGL]

I analyzed this game again, there is no big nor any obvious blunder committed by Stockfish 11 here.
It just lost, probably horizon problems up to endgame.

Thanks for that entertaining game.
here's another one where SF11 was crushed in a B vs R exchange sacrifice of Lc0. Don't know where SF11 made mistake but it reported +5 eval then after a few moves realized SFs own eval was wrong, SF was actually losing.

[pgn]
[Event "?"]
[Site "?"]
[Date "2020.06.15"]
[Round "323"]
[White "Stockfish11_20041220"]
[Black "Lc0"]
[Result "0-1"]
[TimeControl "40/0:300"]
[Termination "adjudication"]
[PlyCount "115"]
[WhiteType "human"]
[BlackType "human"]

1. c4 {book} Nf6 {book} 2. Nc3 {book} g6 {book} 3. g3 {book} Bg7 {book} 4.
Bg2 {book} O-O {book} 5. d3 {book} c5 {book} 6. Bg5 {book} Nc6 {book} 7.
Qd2 {book} Nd4 {book} 8. h4 {book} h5 {book} 9. e3 {+0.75/17 0.65s} Nc6
{-0.16/7 0.28s} 10. Bxf6 {+0.96/14 0.078s} Bxf6 {-0.34/9 0.21s} 11. Ne4
{+1.00/16 0.12s} d6 {-0.36/9 0.28s} 12. Nxf6+ {+1.06/16 0.14s} exf6
{-0.39/9 0.23s} 13. Ne2 {+1.22/16 0.19s} Bg4 {-0.37/8 0.36s} 14. Nc3
{+1.22/18 0.22s} Ne5 {-0.36/9 0.23s} 15. O-O {+1.24/16 0.12s} Kg7 {-0.34/8
0.23s} 16. b3 {+1.17/20 0.57s} Nf3+ {-0.30/11 0.27s} 17. Bxf3 {+1.23/15
0.090s} Bxf3 {-0.30/10 0.23s} 18. e4 {+1.31/15 0.13s} Qd7 {-0.32/9 0.33s}
19. Kh2 {+1.48/17 0.13s} Rae8 {-0.35/9 0.50s} 20. Rae1 {+1.47/16 0.18s} Qg4
{-0.32/8 0.21s} 21. Nd5 {+2.26/16 0.16s} b6 {-0.35/8 0.49s} 22. b4
{+2.55/21 0.85s} Rh8 {-0.37/6 0.37s} 23. b5 {+2.39/19 0.56s} g5 {-0.50/6
0.32s} 24. Ne3 {+2.50/19 0.47s} Qd7 {-0.49/7 0.22s} 25. a4 {+2.52/16 0.12s}
Re5 {-0.43/6 0.25s} 26. a5 {+2.98/17 0.18s} Rg8 {-0.44/7 0.29s} 27. axb6
{+3.20/17 0.63s} axb6 {-0.51/7 0.21s} 28. Nd5 {+3.12/20 0.44s} Qg4 {-0.42/7
0.39s} 29. Rg1 {+3.24/18 0.20s} Rxd5 {-0.43/7 0.28s} 30. exd5 {+3.34/19
0.21s} Kg6 {-0.59/7 0.50s} 31. Re7 {+4.19/18 0.16s} Ra8 {-0.75/7 0.21s} 32.
Rb7 {+4.46/19 0.16s} Qd4 {-0.69/6 0.47s} 33. Rxb6 {+5.73/18 0.21s} Re8
{-0.86/8 0.21s} 34. Rxd6 {-0.91/24 1.2s} gxh4 {+0.33/6 0.22s} 35. Rg2
{-0.67/22 0.092s} h3 {+0.30/8 0.25s} 36. Kxh3 {-0.76/23 0.27s} Qa1 {+0.39/9
0.21s} 37. Rh2 {-0.74/24 0.23s} Re5 {+0.59/10 0.26s} 38. Kh4 {-0.19/22
0.35s} Qg1 {+0.50/11 0.34s} 39. Rh3 {0.00/22 0.20s} Bg4 {+0.51/12 0.21s}
40. f4 {+0.40/22 0.60s} Re2 {-0.48/7 0.53s} 41. Qc3 {+2.24/19 0.17s} Be6
{+0.50/8 0.56s} 42. dxe6 {-5.99/23 1.8s} Rh2 {+2.26/8 0.48s} 43. Qxf6+
{-4.68/23 0.42s} Kxf6 {+5.28/9 0.61s} 44. exf7+ {-6.72/22 0.31s} Kxf7
{+5.76/8 0.52s} 45. Rxh2 {-6.64/20 0.17s} Qxh2+ {+5.33/10 0.49s} 46. Kg5
{-6.64/1 0s} Qxg3+ {+6.05/8 0.44s} 47. Kf5 {-6.91/20 0.24s} Ke7 {+7.70/7
1.2s} 48. Rg6 {-7.66/21 1.7s} Qxd3+ {+10.67/6 0.62s} 49. Kg5 {-7.45/17
0.15s} Qxc4 {+10.72/5 1.0s} 50. b6 {-9.40/18 0.98s} Kd7 {+11.42/5 0.35s}
51. f5 {-7.52/17 0.25s} Qc1+ {+9.40/5 0.52s} 52. Kxh5 {-6.86/14 0.048s} Qf4
{+9.78/5 0.41s} 53. Rg7+ {-7.14/23 0.36s} Kc6 {+10.91/5 0.26s} 54. Rf7
{-11.54/16 0.29s} Kxb6 {+25.97/5 0.37s} 55. Rf6+ {-47.97/19 0.62s} Kc7
{+38.28/5 0.33s} 56. Rf7+ {-12.85/24 0.20s} Kd6 {+35.29/5 0.25s} 57. Kg6
{-24.51/20 0.33s} Qf3 {+37.10/4 0.23s} 58. Rf6+ {-12.33/16 0.15s, Black
wins by adjudication} 0-1
[/pgn]

Giving away couple of pawns against the dreaded SF11 is no joke, but here Lc0 just did it and still won.
Excellent light square domination on K side of SF which proves fatal.

[Dr.Wael Deeb]

Thanks for that entertaining game.
here's another one where SF11 was crushed in a B vs R exchange sacrifice of Lc0. Don't know where SF11 made mistake but it reported +5 eval then after a few moves realized SFs own eval was wrong, SF was actually losing.

[pgn]
[Event "?"]
[Site "?"]
[Date "2020.06.15"]
[Round "323"]
[White "Stockfish11_20041220"]
[Black "Lc0"]
[Result "0-1"]
[TimeControl "40/0:300"]
[Termination "adjudication"]
[PlyCount "115"]
[WhiteType "human"]
[BlackType "human"]

1. c4 {book} Nf6 {book} 2. Nc3 {book} g6 {book} 3. g3 {book} Bg7 {book} 4.
Bg2 {book} O-O {book} 5. d3 {book} c5 {book} 6. Bg5 {book} Nc6 {book} 7.
Qd2 {book} Nd4 {book} 8. h4 {book} h5 {book} 9. e3 {+0.75/17 0.65s} Nc6
{-0.16/7 0.28s} 10. Bxf6 {+0.96/14 0.078s} Bxf6 {-0.34/9 0.21s} 11. Ne4
{+1.00/16 0.12s} d6 {-0.36/9 0.28s} 12. Nxf6+ {+1.06/16 0.14s} exf6
{-0.39/9 0.23s} 13. Ne2 {+1.22/16 0.19s} Bg4 {-0.37/8 0.36s} 14. Nc3
{+1.22/18 0.22s} Ne5 {-0.36/9 0.23s} 15. O-O {+1.24/16 0.12s} Kg7 {-0.34/8
0.23s} 16. b3 {+1.17/20 0.57s} Nf3+ {-0.30/11 0.27s} 17. Bxf3 {+1.23/15
0.090s} Bxf3 {-0.30/10 0.23s} 18. e4 {+1.31/15 0.13s} Qd7 {-0.32/9 0.33s}
19. Kh2 {+1.48/17 0.13s} Rae8 {-0.35/9 0.50s} 20. Rae1 {+1.47/16 0.18s} Qg4
{-0.32/8 0.21s} 21. Nd5 {+2.26/16 0.16s} b6 {-0.35/8 0.49s} 22. b4
{+2.55/21 0.85s} Rh8 {-0.37/6 0.37s} 23. b5 {+2.39/19 0.56s} g5 {-0.50/6
0.32s} 24. Ne3 {+2.50/19 0.47s} Qd7 {-0.49/7 0.22s} 25. a4 {+2.52/16 0.12s}
Re5 {-0.43/6 0.25s} 26. a5 {+2.98/17 0.18s} Rg8 {-0.44/7 0.29s} 27. axb6
{+3.20/17 0.63s} axb6 {-0.51/7 0.21s} 28. Nd5 {+3.12/20 0.44s} Qg4 {-0.42/7
0.39s} 29. Rg1 {+3.24/18 0.20s} Rxd5 {-0.43/7 0.28s} 30. exd5 {+3.34/19
0.21s} Kg6 {-0.59/7 0.50s} 31. Re7 {+4.19/18 0.16s} Ra8 {-0.75/7 0.21s} 32.
Rb7 {+4.46/19 0.16s} Qd4 {-0.69/6 0.47s} 33. Rxb6 {+5.73/18 0.21s} Re8
{-0.86/8 0.21s} 34. Rxd6 {-0.91/24 1.2s} gxh4 {+0.33/6 0.22s} 35. Rg2
{-0.67/22 0.092s} h3 {+0.30/8 0.25s} 36. Kxh3 {-0.76/23 0.27s} Qa1 {+0.39/9
0.21s} 37. Rh2 {-0.74/24 0.23s} Re5 {+0.59/10 0.26s} 38. Kh4 {-0.19/22
0.35s} Qg1 {+0.50/11 0.34s} 39. Rh3 {0.00/22 0.20s} Bg4 {+0.51/12 0.21s}
40. f4 {+0.40/22 0.60s} Re2 {-0.48/7 0.53s} 41. Qc3 {+2.24/19 0.17s} Be6
{+0.50/8 0.56s} 42. dxe6 {-5.99/23 1.8s} Rh2 {+2.26/8 0.48s} 43. Qxf6+
{-4.68/23 0.42s} Kxf6 {+5.28/9 0.61s} 44. exf7+ {-6.72/22 0.31s} Kxf7
{+5.76/8 0.52s} 45. Rxh2 {-6.64/20 0.17s} Qxh2+ {+5.33/10 0.49s} 46. Kg5
{-6.64/1 0s} Qxg3+ {+6.05/8 0.44s} 47. Kf5 {-6.91/20 0.24s} Ke7 {+7.70/7
1.2s} 48. Rg6 {-7.66/21 1.7s} Qxd3+ {+10.67/6 0.62s} 49. Kg5 {-7.45/17
0.15s} Qxc4 {+10.72/5 1.0s} 50. b6 {-9.40/18 0.98s} Kd7 {+11.42/5 0.35s}
51. f5 {-7.52/17 0.25s} Qc1+ {+9.40/5 0.52s} 52. Kxh5 {-6.86/14 0.048s} Qf4
{+9.78/5 0.41s} 53. Rg7+ {-7.14/23 0.36s} Kc6 {+10.91/5 0.26s} 54. Rf7
{-11.54/16 0.29s} Kxb6 {+25.97/5 0.37s} 55. Rf6+ {-47.97/19 0.62s} Kc7
{+38.28/5 0.33s} 56. Rf7+ {-12.85/24 0.20s} Kd6 {+35.29/5 0.25s} 57. Kg6
{-24.51/20 0.33s} Qf3 {+37.10/4 0.23s} 58. Rf6+ {-12.33/16 0.15s, Black
wins by adjudication} 0-1
[/pgn]

Giving away couple of pawns against the dreaded SF11 is no joke, but here Lc0 just did it and still won.
Excellent light square domination on K side of SF which proves fatal.

Two quick remarks :

_1 Both 8th engines moves are odd and are typical computer chess approach ....

_ The beginning of Stockfish perish is letting the black knight occupy the e5 square on the 14th move ....

Dr.D

[yurikvelo]

I analyzed this game again, there is no big nor any obvious blunder committed by Stockfish 11 here.

Excellent light square domination on K side of SF which proves fatal.

just SF blunder, no domination

Code: Select all

+4,04	32.Re3 Kg7 33.Qb2 Kg6 34.Ra1 Rg8
+3,48	32.Qb2 Qf5 33.Qd2 Bg4 34.Re3 Kh7
+3,33	32.Ree1 Kf5 33.hxg5 fxg5 34.Re3 h4
+2,31	32.Rf1 gxh4 33.Qf4 Ra2 34.Qxg4+ hxg4
+1,71	32.Rc7 Qd4 33.Re7 Ra3 34.Re3 g4
+1,65	32.Qc2 Qd4 33.Qd2 Ra3 34.Re3 Bg4
+1,56	32.Rb7 Qd4 33.Re7 Ra3 34.Re3 g4  	 <---- Stockfish (draw indeed)
+1,00	32.Rc1 gxh4 33.Rg1 Kf5 34.Rxf7 Re8
+0,95	32.Rge1 gxh4 33.Rg1 Kf5 34.Rxf7
=0,00	32.Qe1 Ra2 33.d4 Kg7 34.dxc5 f5

+1,54	33.Re7 Ra3 34.Re3 g4 35.Rge1 Kg7
=0,00	33.Rxb6 Re8 34.Rxd6 gxh4 35.Rg2 h3		<---- Stockfish
=0,00	33.Re1 gxh4 34.Rbe7 hxg3+ 35.fxg3 Ra3
-0,29	33.hxg5 fxg5 34.Re7 h4 35.g4 Qf6


=0,00	40.Rxf6+ Kxf6 41.Qf4+ Rf5 42.Qh6+ Ke5
=0,00	40.Qf4 Rf5 41.Rxf6+ Kxf6 42.Qh6+ Ke5
-3,55	40.d4 cxd4 41.c5 Qb1 42.Rh2 Bf3
-7,68	40.f4 Re2 41.Rxf6+ Kxf6 42.Qc3+ Qd4	<---- Stockfish

33.Rxb6 has very high evaluation and fail-low at D=26 (14 MN, 3 seconds on 5 Mn/sec CPU).
At bullet time-control (0.5 sec for move on average) SF can make these 2 blunders

for high-quality Lc0 wins look at my PGNs:
http://talkchess.com/forum3/viewtopic.p ... 79#p848179

I analyzed some of them - it's really hard to find where was mistake, really positional skills, not opponent blunders