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Up Topic The Rybka Lounge / Computer Chess / CCC: Danish Gambit Accepted 3|2 {is it sound?}
- By MrKris (****) Date 2021-06-27 17:28
Romantic Openings: Danish Gambit Accepted (3|2)
https://www.chess.com/computer-chess-championship#event=romantic-openings-danish-gambit-accepted

{is it sound?} - I am acquainted with the basics, its an interesting question because the top 3 are undefeated with white - even vs. each other.
Interesting is that so far none have played 5...d5 returning one pawn for a nearly even game (say humans and near 0.00 Stockfish).

All games 1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2
- in progress

1 Dragon (3600) 53.5/78
2 Stockfish (3862) 52.5/78
3 Lc0 (3640) 48.5/76
4 Igel (3500) 43.5/76
5 Rubi (3471) 43.5/76
6 Ethereal (3590) 43/78
7 Pedone (3098) 41.5/78
8 Komodo (3526) 38/76
9 Stoofvlees (3553) 37.5/78
10 Xiphos (3428) 28/76
11 SlowChess (3422) 24.5/76
12 Nemorino (3102) 8/78

So far:
   Dragon vs Ethereal:  6.5-1.5[+5] 1½1½111½
Stockfish vs Ethereal:  3.5-2.5[+1] ½½1½½½


So far the top 3 have 100% draws vs. each other, and they are all undefeated with black, as expected, but with white also:
     Dragon (78)
White  65.38%   +  12  -   0  =  27    25.5 /  39
Black  71.79%   +  17  -   0  =  22    28.0 /  39
     Stockfish (78)
White  65.38%   +  12  -   0  =  27    25.5 /  39
Black  69.23%   +  15  -   0  =  24    27.0 /  39
     Lc0 (76)
White  64.47%   +  11  -   0  =  27    24.5 /  38
Black  63.15%   +  10  -   0  =  28    24.0 /  38

 
[Event "Romantic Openings: Danish Gambit Accepted (3|2)"]
[Site "chess.com"]
[Date "2021.06.24"]
[Round "1"]
[White "Stockfish"]
[Black "Dragon"]
[Result "1/2-1/2"]
[ECO "C21"]
[GameDuration "00:07:30"]
[GameEndTime "2021-06-24T09:58:00.045 PDT"]
[GameStartTime "2021-06-24T09:50:29.507 PDT"]
[Opening "Danish gambit"]
[PlyCount "97"]
[Termination "adjudication"]
[TimeControl "180+2"]

1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Nf6 6. e5 Bb4+ 7. Bc3 Qe7 8.
Qe2 Ng8 9. Nf3 Nh6 10. O-O O-O 11. Bxb4 Qxb4 12. Rc1 Qa5 13. Nc3 Nc6 14. Rab1 d6
15. exd6 cxd6 16. h3 a6 17. Nd5 Be6 18. Nb6 Rae8 19. Bxe6 Rxe6 20. Qd3 Ne5 21.
Nxe5 dxe5 22. Nd7 Rd8 23. Rxb7 e4 24. Qe3 Qd5 25. Qb3 Qxb3 26. axb3 Nf5 27. Rd1
Ree8 28. Ra7 e3 29. fxe3 Nxe3 30. Ra1 f6 31. R1xa6 Rc8 32. Ra1 Rc2 33. R7a2 Rec8
34. b4 Rxa2 35. Rxa2 Rc1+ 36. Kf2 Nd5 37. Rb2 Nc3 38. Kg3 Nb5 39. Nc5 Rc4 40.
Kf2 Kf7 41. Rd2 g5 42. Rd7+ Kg6 43. g4 h5 44. Ne6 hxg4 45. hxg4 f5 46. gxf5+ Kf6
47. Kf3 Kxf5 48. Rd5+ Kxe6 49. Rxb5 1/2-1/2

[Event "Danish Gambit Accepted (3|2)"]
[Site "chess.com"]
[Date "2021.06.24"]
[Round "1"]
[White "Dragon"]
[Black "Lc0"]
[Result "1/2-1/2"]
[ECO "C21"]
[GameDuration "00:09:12"]
[GameEndTime "2021-06-24T07:50:00.629 PDT"]
[GameStartTime "2021-06-24T07:40:48.165 PDT"]
[Opening "Danish gambit"]
[PlyCount "110"]
[TimeControl "180+2"]

1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Nf6 6. e5 d5 7. exf6 Bb4+ 8.
Bc3 Bxc3+ 9. Nxc3 dxc4 10. fxg7 Rg8 11. Qf3 Nc6 12. Nge2 Be6 13. Rd1 Qe7 14. O-O
Rxg7 15. Nd5 Bxd5 16. Qxd5 Rd8 17. Qxc4 Rg6 18. Ng3 Rxd1 19. Rxd1 Rd6 20. Rxd6
cxd6 21. h4 a6 22. Qg4 Qe1+ 23. Nf1 Qb1 24. h5 Nd8 25. Qg8+ Ke7 26. Qg5+ Kd7 27.
Qg8 Qe4 28. Ng3 Qb1+ 29. Nf1 Qe4 30. Ng3 Qd3 31. Nf1 b5 32. g4 Qe4 33. Ng3 Qc2
34. Nf1 a5 35. g5 Qc5 36. Ng3 Qc2 37. Qg7 Ke7 38. Qf6+ Kd7 39. Nf1 Qe4 40. Qg7
Qf4 41. Qxh7 Qxg5+ 42. Ng3 b4 43. h6 Qg6 44. Qh8 Ne6 45. Qb8 Nc7 46. Qh8 Ne8 47.
Kg2 Nf6 48. Qb8 Qxh6 49. Qb5+ Ke6 50. Qc4+ Ke5 51. Qe2+ Kd5 52. Qb5+ Ke6 53.
Qc4+ Ke5 54. Qe2+ Kd5 55. Qb5+ Ke6 1/2-1/2

[Event "Danish Gambit Accepted (3|2)"]
[Site "?"]
[Date "2021.06.26"]
[Round "1"]
[White "Lc0"]
[Black "Stockfish"]
[Result "1/2-1/2"]
[ECO "C21"]
[GameDuration "00:08:59"]
[GameEndTime "2021-06-26T16:55:23.305 PDT"]
[GameStartTime "2021-06-26T16:46:23.435 PDT"]
[Opening "Danish gambit"]
[PlyCount "115"]
[Termination "adjudication"]
[TimeControl "180+2"]

1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Nf6 6. e5 Bb4+ 7. Bc3 Qe7 8.
Qe2 Ng8 9. Nf3 Nh6 10. O-O O-O 11. Qe4 d5 12. Bxd5 Bxc3 13. Nxc3 c6 14. Bc4 Be6
15. a4 a5 16. h4 Na6 17. Ng5 Bf5 18. Qf4 Nc5 19. Nce4 Nxe4 20. Nxe4 Rfe8 21. Nd6
Qxe5 22. Qxe5 Rxe5 23. Nxb7 Re7 24. Nc5 Re5 25. Nb3 Kf8 26. Rac1 Bd7 27. Bd3 Rd8
28. Rfe1 Rxe1+ 29. Rxe1 Be6 30. Nc5 Bf5 31. Be4 Bxe4 32. Rxe4 Nf5 33. Nb3 Rd5
34. Rc4 Ke7 35. Rxc6 Nd4 36. Rb6 g6 37. g3 Nxb3 38. Rxb3 Rd4 39. Rb7+ Kf6 40.
Rb6+ Kg7 41. Ra6 Rxa4 42. Kg2 h6 43. Kh3 Ra1 44. Kg4 Ra4+ 45. Kh3 Ra2 46. Kg2
Ra3 47. Kh3 Rf3 48. Rxa5 Rxf2 49. Ra7 Rf3 50. Kg2 Re3 51. Kf2 Rc3 52. Kg2 Rd3
53. Kh3 Rd2 54. Rc7 Ra2 55. Rb7 Ra4 56. Rb1 Re4 57. Ra1 Kf6 58. Rf1+ 1/2-1/2
- By MrKris (****) Date 2021-07-05 07:53
Romantic Openings: Danish Gambit Accepted (3|2)
https://www.chess.com/computer-chess-championship#event=romantic-openings-danish-gambit-accepted

{is it sound?} - top 3 versus each other only, 14 games each, all draws except one:
            Sf               Lc0             Dr
1 Sf                   ½½½½½½½½½½½½½½  ½½½½½½½½½½½½1½
2 Dr   ½½½½½½½½½½½½½½                  ½½½½½½½½½½½½½½
3 Lc0  ½½½½½½½½½½½½0½  ½½½½½½½½½½½½½½


All games 1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2
- final standings

1 Stockfish (3862) 105/154
2 Dragon (3600) 104/154
3 Lc0 (3640) 98/154
4 Igel (3500) 84.5/154
5 Rubi (3471) 84/154
6 Ethereal (3590) 82.5/154
7 Pedone (3098) 76.5/154
8 Komodo (3526) 75.5/154
9 Stoofvlees (3553) 75/154
10 SlowChess (3422) 68.5/154
11 Xiphos (3428) 55.5/154
12 Nemorino (3102) 15/154

The only non-draw amongst the top 3: [Event "Romantic Openings: Danish Gambit Accepted (3|2)"]
[Site "Chess.com"]
[Date "2021.06.30"]
[Round "899"]
[White "Lc0"]
[Black "Stockfish"]
[Result "0-1"]
[ECO "C21"]
[Opening "Danish gambit"]
[TimeControl "180+2"]
[Termination "normal"]
[PlyCount "172"]
[WhiteType "human"]
[BlackType "human"]

1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Nf6 {+0.65/35 0} 6. Nc3
{-0.37/18 0} d5 {+0.92/28 0} 7. Nxd5 {-0.39/23 0} Nxd5 {+0.92/31 0} 8. exd5
{-0.37/23 0} Bb4+ {+1.23/28 0} 9. Kf1 {-0.39/19 0} O-O {+1.23/30 0} 10. Qd4
{-0.52/22 0} Qg5 {+1.07/33 0} 11. h4 {-0.59/23 0} Qg4 {+1.24/33 0} 12. Qxg4
{-0.65/24 0} Bxg4 {+1.47/32 0} 13. h5 {-0.64/26 0} Re8 {+1.49/34 0} 14. h6
{-0.68/25 0} g6 {+1.21/32 0} 15. Rc1 {-0.69/24 0} Bd2 {+1.20/33 0} 16. Rb1
{-0.71/22 0} Nd7 {+1.29/32 0} 17. Nf3 {-0.72/23 0} Bxf3 {+1.25/35 0} 18.
gxf3 {-0.54/19 0} Nb6 {+1.25/39 0} 19. Bb3 {-0.56/20 0} Rad8 {+1.16/40 0}
20. Rd1 {-0.56/20 0} Bf4 {+1.42/32 0} 21. Bf6 {-0.55/18 0} Rd6 {+1.66/36 0}
22. Bg7 {-0.59/17 0} a5 {+1.26/36 0} 23. Rd4 {-0.48/22 0} a4 {+1.00/35 0}
24. Bc2 {-0.50/24 0} Bc1 {+1.08/38 0} 25. Re4 {-0.52/25 0} Ra8 {+1.07/38 0}
26. Kg2 {-0.56/23 0} Ba3 {+1.17/37 0} 27. Rhe1 {-0.57/24 0} Rdd8 {+1.22/37
0} 28. Bf6 {-0.56/26 0} Rdc8 {+1.11/35 0} 29. Rb1 {-0.51/22 0} Bd6
{+1.13/37 0} 30. Rb5 {-0.48/23 0} Nd7 {+1.12/33 0} 31. Be7 {-0.48/25 0} a3
{+0.99/34 0} 32. Bd1 {-0.51/25 0} b6 {+0.95/33 0} 33. Bxd6 {-0.52/25 0}
cxd6 {+1.04/42 0} 34. Re7 {-0.51/24 0} Ra7 {+1.20/46 0} 35. Rb3 {-0.51/24
0} Kf8 {+1.20/43 0} 36. Rbe3 {-0.44/27 0} Rca8 {+1.16/43 0} 37. Ba4
{-0.29/22 0} Ne5 {+1.26/49 0} 38. Rxa7 {-0.33/23 0} Rxa7 {+1.25/41 0} 39.
Bc6 {-0.34/24 0} Nxc6 {+1.31/40 0} 40. dxc6 {-0.34/19 0} Rc7 {+1.01/41 0}
41. Rxa3 {-0.37/21 0} Rxc6 {+0.99/40 0} 42. Ra7 {-0.33/17 0} b5 {+0.79/47
0} 43. f4 {-0.42/19 0} Rc4 {+0.95/44 0} 44. Kf3 {-0.40/19 0} Ke8 {+1.62/35
0} 45. Ra8+ {-0.49/19 0} Ke7 {+1.85/36 0} 46. Rb8 {-0.48/18 0} Rc3+
{+2.05/34 0} 47. Kg2 {-0.77/22 0} Rc5 {+2.46/38 0} 48. Rh8 {-0.81/26 0} d5
{+2.70/33 0} 49. Rxh7 {-0.79/27 0} Rc8 {+3.19/35 0} 50. Kf3 {-0.78/28 0}
Kf6 {+4.06/36 0} 51. Ke3 {-0.86/25 0} Re8+ {+4.29/36 0} 52. Kd3 {-0.88/24
0} Ra8 {+4.55/42 0} 53. Rg7 {-0.89/24 0} Rh8 {+4.72/41 0} 54. Ke3 {-0.88/24
0} b4 {+4.80/43 0} 55. f3 {-0.87/23 0} Rxh6 {+4.96/41 0} 56. Rg8 {-0.88/22
0} Rh2 {+5.12/43 0} 57. Rb8 {-0.87/20 0} Rxa2 {+5.37/41 0} 58. Rxb4
{-0.87/18 0} Ra3+ {+5.45/36 0} 59. Kf2 {-0.87/17 0} Ra7 {+5.53/32 0} 60.
Rb5 {-0.83/16 0} Ke6 {+5.78/31 0} 61. Ke3 {-0.81/16 0} Ra3+ {+6.43/27 0}
62. Ke2 {-0.79/14 0} d4 {+8.42/31 0} 63. Rb7 {-2.36/20 0} Re3+ {+8.50/21 0}
64. Kf2 {-2.90/22 0} Rc3 {+8.86/26 0} 65. Rb6+ {-3.87/21 0} Kd5 {+9.25/24
0} 66. Rf6 {-4.00/20 0} Rc2+ {+10.24/24 0} 67. Ke1 {-4.21/17 0} Rc7
{+10.76/22 0} 68. Ke2 {-4.74/18 0} Ra7 {+12.35/21 0} 69. Kd2 {-5.50/14 0}
Re7 {+14.63/21 0} 70. Kc2 {-6.46/16 0} Re3 {+56.12/24 0} 71. Rxf7 {-12.88/8
0} Ke6 {+152.61/57 0} 72. Rg7 {-38.11/4 0} Kf6 {+152.62/62 0} 73. Ra7
{-18.31/2 0} Rxf3 {+152.63/35 0} 74. Ra2 {-122.26/3 0} Rf2+ {+M57/29 0} 75.
Kb3 {-M500/2 0} Rxa2 {+M29/31 0} 76. Kxa2 {-M500/2 0} Kf5 {+M27/60 0} 77.
Kb2 {-M500/2 0} Kxf4 {+M25/78 0} 78. Kc1 {-M500/2 0} Ke4 {+M23/64 0} 79.
Kd2 {-M500/2 0} g5 {+M21/162 0} 80. Ke2 {-M500/2 0} d3+ {+M19/61 0} 81. Kd2
{-M500/2 0} g4 {+M17/102 0} 82. Ke1 {-M500/2 0} g3 {+M15/110 0} 83. Kf1
{-M500/2 0} Ke3 {+M11/245 0} 84. Kg2 {-M500/2 0} d2 {+M9/245 0} 85. Kh1
{-121.94/2 0} Kf3 {+M3/245 0} 86. Kg1 {-126.79/1 0} d1=R# {+M1/245 0} 0-1


The event was 924 games.  Here are some interesting variations from Scid-vs-PC:

1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Bb4+ 6.Nc3: +78 =167 -19 (161.5/264: 61%)

1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Nf6 6.e5: +12 =273 -69 (148.5/354: 42%)
- By MrKris (****) Date 2021-07-05 08:21
1. Stockfish, 2. Dragon, 3. Lc0 vs. each other only:

  1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2: white +0 =41 -1 (20.5/42: 49%)
-------------------------------------------------------------------------------
     5        6        7        8        9       10       11       12    
-------------------------------------------------------------------------------
1  Bb2      Nc3      Qb3      Qc3      Nf3[2]   OO       Rad1     e5        4:
    Bb4      Nf6[1]   Bc3      OO       d6       Nc6      Be6      Ne4[3]   50%

2  ...      Nc3      Nd5      ed5      Kf1      Qd4      h4       Qg4       5:
    Nf6      d5       Nd5      Bb4      OO       Qg5      Qg4      Bg4[4]   40%

3  ...      e5       ef6      Bc3      Nc3      fg7      Qf3      Nge2      2:
    ...      d5       Bb4      Bc3      dc4      Rg8      Rg7      Nc6[5]   50%

4  ...      ...      ...      ...      ...      ...      ...      Nge2     10:
    ...      ...      ...      ...      ...      ...      Nc6      Be6[6]   50%

5  ...      ...      Bc3      Nc3      ef6      fg7      Qf3      Nge2      2:
    ...      Bb4      Bc3      d5       dc4      Rg8      Nc6      Rg7[7]   50%

6  ...      ...      ...      Qe2      Nf3      OO[8]    Bb4      Rc1       3:
    ...      ...      Qe7      Ng8      Nh6      OO       Qb4      d6[9]    50%

7  ...      ...      ...      ...      ...      ...      a3       Nc3       3:
    ...      ...      ...      ...      ...      ...      Bc3      Nc6[10]  50%

8  ...      ...      ...      ...      ...      ...      Qe4      Bd5      13:
    ...      ...      ...      ...      ...      ...      d5       Bc3[11]  50%


[4]  13.h5 Re8 14.h6 g6 15.Rc1 Bd2 16.Rb1 Nd7 17.Nf3 Bxf3 18.gxf3 Nb6 19.Bb3 Rad8 20.Rd1 Bf4 21.Bf6 Rd6 22.Bg7 Nd7 =-=(118) Lc0 - Stockfish, Chess.com 2021;   =-=(142) Lc0 - Stockfish, Chess.com 2021; 
    22...a5 0-1(86) Lc0 - Stockfish, Chess.com 2021; 
  17...Nb6 18.Bb3 Bxf3 19.gxf3 Rad8 20.Rd1 Bf4 21.Bf6 Rd6 22.Bg7 Nd7 =-=(135) Lc0 - Stockfish, Chess.com 2021;
      18...Bf4 19.Rh4 Bxf3 20.gxf3 Bg5 21.Re4 Bxh6 22.Rbe1 Rxe4 =-=(58) Lc0 - Dragon, Chess.com 2021.
Up Topic The Rybka Lounge / Computer Chess / CCC: Danish Gambit Accepted 3|2 {is it sound?}

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