Complicated position found

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Nordlandia
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Complicated position found

Post by Nordlandia »

Leela excels as black here. Won handful of games against Stockfish and Komodo already. Net 280 being used.

Cfish Pure with contempt at 0 managed to hold once. Would be interesting to see position played out on strong hardware.

[d]r3kb1r/p1pb1ppp/3n4/4p3/5n1Q/2P5/PP1P1PPP/RNB1K2R w KQkq - 1 13
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peter
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Full name: Peter Martan

Re: Complicated position found

Post by peter »

Nordlandia wrote: ↑Fri Oct 23, 2020 7:23 pm Would be interesting to see position played out on strong hardware.
Why not give weak hardware some longer TC?
Peter.
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Tony P.
Posts: 216
Joined: Sun Jan 22, 2017 8:30 pm
Location: Russia

Re: Complicated position found

Post by Tony P. »

To add a bit of context, the position itself is interesting, however, it arises from a human opening variation (Two Knights: Fritz, Gruber Variation, 8. Ne4) where both sides blunder :mrgreen:

[pgn][Event "Computer chess game"]
[Site "PC"]
[Date "2020.10.24"]
[Round "?"]
[White "PC"]
[Black "PC"]
[Result "*"]
[ECO "C57"]
[Opening "Two Knights"]
[Variation "Fritz, Gruber Variation (8.Ne4)"]
[Termination "unterminated"]
[PlyCount "24"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nd4? (5. .. Na5) 6. c3 b5
7. Bf1 Nxd5 8. Ne4? (8. cxd4) 8. .. Qh4 9. Bxb5+?? (9. Ng3) 9. .. Nxb5 10.
Qa4 Bd7?? (10. .. Nf4{SF eval around -3}) 11. Nd6+ Nxd6 12. Qxh4 Nf4 *

[/pgn]
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Nordlandia
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Re: Complicated position found

Post by Nordlandia »

peter wrote: ↑Fri Oct 23, 2020 8:15 pm
Nordlandia wrote: ↑Fri Oct 23, 2020 7:23 pm Would be interesting to see position played out on strong hardware.
Why not give weak hardware some longer TC?
I'll give it a try ;)
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Nordlandia
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Re: Complicated position found

Post by Nordlandia »

Surprisingly Komodo 14 Monte Carlo managed to hold.

[pgn][Event "?"]
[Site "https://lichess.org/ver8mjgA"]
[Date "2020.10.24"]
[Round "?"]
[White "komodo-14-64bit-bmi2"]
[Black "lc0"]
[Result "1/2-1/2"]
[WhiteElo "?"]
[BlackElo "?"]
[Variant "From Position"]
[TimeControl "2700+30"]
[ECO "?"]
[Opening "?"]
[Termination "Normal"]
[FEN "r3kb1r/p1pb1ppp/3n4/4p3/5n1Q/2P5/PP1P1PPP/RNB1K2R w KQkq - 1 13"]
[SetUp "1"]
[Annotator "lichess.org"]

13. Qg3 Bb5 14. a4 Bd3 15. b4 h5 16. Rg1 g5 17. Na3 Rh6 18. Nb5 Nf5 19. Nxc7+ Kd7 20. Nxa8 Nxg3 21. hxg3 Ne2 22. Rh1 Nxc1 23. Rxc1 Bd6 24. f3 Kc6 25. Kf2 Rh8 26. g4 h4 27. g3 Kb7 28. gxh4 gxh4 29. Rce1 Kxa8 30. Re3 Bc2 31. a5 Kb7 32. d3 Ka6 33. Rc1 Ba4 34. Re2 Bd7 35. c4 h3 36. Rb1 f6 37. Ree1 Bc7 38. b5+ Kxa5 39. Rec1 f5 40. Ra1+ Kb6 41. c5+ Kxb5 42. c6 Bc8 43. Rab1+ Ka4 44. Ra1+ Kb3 45. Rab1+ Ka4 46. Kg1 fxg4 47. Ra1+ Kb3 48. Rab1+ Ka3 49. Ra1+ Kb4 50. Rab1+ Ka3 51. Ra1+ Kb4 52. Rab1+ Ka5 53. Ra1+ Kb6 54. Rab1+ Ka6 { The game is a draw. } 1/2-1/2[/pgn]
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peter
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Full name: Peter Martan

Re: Complicated position found

Post by peter »

Nordlandia wrote: ↑Sun Oct 25, 2020 5:25 am Surprisingly Komodo 14 Monte Carlo managed to hold.
...
[TimeControl "2700+30"]
Now you're on the right track!
:)
Peter.
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Nordlandia
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Location: Sortland, Norway

Re: Complicated position found

Post by Nordlandia »

Amazing game by leela. I didn't think the endgame in the end was won. Maybe lack of time made SF lose that or was it already lost no matter the time available ?

Cfish static and dynamic contempt at 0.

FEN position holdable or lost ?

[d]3k4/2p5/3b2Q1/n1r5/8/2PKP3/8/8 b - - 0 58

[pgn][Event "?"]
[Site "https://lichess.org/zMnOZXyG"]
[Date "2020.11.18"]
[Round "?"]
[White "CF_EXT_x64_161120_E_BMI2"]
[Black "lc0"]
[Result "0-1"]
[WhiteElo "?"]
[BlackElo "?"]
[Variant "From Position"]
[TimeControl "1800+30"]
[ECO "?"]
[Opening "?"]
[Termination "Unknown"]
[FEN "r3kb1r/p1p2ppp/3n4/1b2p3/5n2/2P3Q1/PP1P1PPP/RNB1K2R w KQkq - 0 14"]
[SetUp "1"]
[Annotator "lichess.org"]

14. Qf3 Nd3+ 15. Kd1 e4 16. Qe3 Be7 17. b3 O-O 18. Kc2 Rfe8 19. a4 Ba6 20. f4 Bh4 21. g3 Nf5 22. Qg1 Bf6 23. Na3 Nb4+ 24. Kb1 Bd3+ 25. Kb2 e3 26. dxe3 Nd6 27. Bd2 Rab8 28. g4 g6 29. f5 Na6 30. Nb5 Nc5 31. fxg6 hxg6 32. Ra3 Nxb5 33. axb5 Red8 34. Qg3 Be4 35. Rd1 Be5 36. Qg1 Bf3 37. Kc1 Bxd1 38. Qxd1 Ne4 39. Rxa7 Nxd2 40. Qh1 Nxb3+ 41. Kc2 Rxb5 42. Ra8 Rxa8 43. Qxa8+ Kg7 44. Qe8 Na1+ 45. Kd3 Rc5 46. h4 Nb3 47. h5 Bd6 48. hxg6 fxg6 49. Qe6 Na5 50. g5 Rxg5 51. Qd7+ Kh6 52. Qe8 Rc5 53. Qh8+ Kg5 54. Qd8+ Kf5 55. Qc8+ Kf6 56. Qh8+ Ke7 57. Qh7+ Kd8 58. Qxg6 Kc8 59. Qe4 Kb8 60. Qd4 Nb7 61. Ke4 Be5 62. Qd1 Bxc3 63. Qb3 Ka7 64. Qa3+ Kb6 65. Kd3 Na5 66. Qa4 Be5 67. Ke2 Bd6 68. Qd4 Nc6 69. Qd3 Nb4 70. Qg6 Re5 71. Kf3 Rd5 72. e4 Rc5 73. Qg1 Be5 74. Kg4 Nc6 75. Qf2 Na5 76. Qf7 Nc4 77. Qf2 Kb5 78. Qe1 c6 79. Kh4 Ka4 80. Qd1+ { Black wins. } 0-1[/pgn]

https://lichess.org/zMnOZXyG#26
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Nordlandia
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Re: Complicated position found

Post by Nordlandia »

Dragon dynamism at 80 instead of 100.

[pgn][Event "i7-5960X 4.5GHz / 2x 2080 Supe"]
[Site "https://lichess.org/UhIfYODp"]
[Date "2020.11.27"]
[Round "?"]
[White "dragon-64bit-avx2"]
[Black "lc0"]
[Result "0-1"]
[WhiteElo "?"]
[BlackElo "?"]
[Variant "From Position"]
[TimeControl "-"]
[ECO "?"]
[Opening "?"]
[Termination "Normal"]
[FEN "r3kb1r/p1p2ppp/3n4/1b2p3/5n2/2P3Q1/PP1P1PPP/RNB1K2R w KQkq - 0 14"]
[SetUp "1"]
[Annotator "lichess.org"]

14. a4 Bd3 15. b4 h5 16. h4 Rh6 17. Qh2 Ne4 18. Na3 Rd8 19. Rg1 Rg6 20. g3 Ne2 21. Rg2 a5 22. Nb5 c6 23. Nc7+ Kd7 24. f3 N4xg3 25. Na6 Bxa6 26. b5 cxb5 27. Rxe2 Nxe2 28. Qxe2 b4 29. Qe4 bxc3 30. dxc3 Rg1+ 31. Kf2 Bc5+ 32. Be3 Bxe3+ 33. Qxe3 Rxa1 34. Qa7+ Ke8 35. Qxa6 Ra2+ 36. Kg3 Kf8 37. Qc4 Ra1 38. Qc5+ Kg8 39. Qxa5 Re8 40. c4 g6 41. c5 Rc8 42. Qb4 Rg1+ 43. Kh3 Rc1 44. a5 e4 45. Qxe4 R1xc5 46. Qb7 R5c7 47. Qa6 Rd8 48. Qb6 Rcd7 49. Kg3 Ra8 50. f4 Rd3+ 51. Kg2 Rc8 52. Qb1 Rd2+ 53. Kf3 Rd5 54. Qb6 Ra8 55. a6 Rd3+ 56. Kg2 Ra3 57. f5 R3xa6 { White resigns. } 0-1[/pgn]

Brief lichess server analysis - https://lichess.org/UhIfYODp
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mmt
Posts: 343
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Re: Complicated position found

Post by mmt »

Latest SF dev thinks it's a draw:

78/94 6:13:39 580,591,250k 25,897k 0.00 1.Qg3 Bb5 2.Qf3 Nd3+ 3.Kd1 e4 4.Qe3 Bc6 5.Kc2 Nf5 6.Qe2 Nb4+ 7.Kd1 Nd3 8.f3 Bc5 9.fxe4 0-0-0 10.Rf1 Ne3+ 11.dxe3 Nf4+ 12.Nd2 Nxe2 13.Kxe2 Bd6 14.Rxf7 Bxh2 15.c4 Be5 16.Nf3 Bf6 17.e5 Be8 18.Rxc7+ Kxc7 19.exf6 gxf6 20.Bd2 Rd7 21.Bc3 Rg8 22.Rg1 Rg4 23.b3 Rd6 24.Kf2 Kc8 25.g3 h5 26.Rh1 Bg6 27.Bd4 Ra6 28.a4 Ra5 29.c5 Bf7 30.Nd2 Ra6 31.Rh3 Bg6 32.Rh2 Kd7 33.Rh1 Kc8
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Nordlandia
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Re: Complicated position found

Post by Nordlandia »

mmt wrote: ↑Thu Dec 03, 2020 3:48 pm Latest SF dev thinks it's a draw:

78/94 6:13:39 580,591,250k 25,897k 0.00 1.Qg3 Bb5 2.Qf3 Nd3+ 3.Kd1 e4 4.Qe3 Bc6 5.Kc2 Nf5 6.Qe2 Nb4+ 7.Kd1 Nd3 8.f3 Bc5 9.fxe4 0-0-0 10.Rf1 Ne3+ 11.dxe3 Nf4+ 12.Nd2 Nxe2 13.Kxe2 Bd6 14.Rxf7 Bxh2 15.c4 Be5 16.Nf3 Bf6 17.e5 Be8 18.Rxc7+ Kxc7 19.exf6 gxf6 20.Bd2 Rd7 21.Bc3 Rg8 22.Rg1 Rg4 23.b3 Rd6 24.Kf2 Kc8 25.g3 h5 26.Rh1 Bg6 27.Bd4 Ra6 28.a4 Ra5 29.c5 Bf7 30.Nd2 Ra6 31.Rh3 Bg6 32.Rh2 Kd7 33.Rh1 Kc8
As long SF agrees to trade the queen for two minor pieces around the white king then yes, the game should end in a draw. The pitfall occur when SF try to cling on the queen advantage.
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