Hello All,
After almost exactly 6.5 years, there's a new release of Myrddin, version 0.88. Testing estimates an increase of about 110-115 elo at 1 CPU, plus slight efficiency improvement with my Very Lazy SMP (previous versions were about +90 at 4 CPU and this is around +100).
Many thanks to all who kept me interested over the long break, particularly Martin Sedlak (Cheng) who guided me through tuning, Graham Banks who regularly expressed a desire for a new version, and Lars Hallerstrom for his invaluable testing.
You can download the package here:
http://computer-chess.org/doku.php?id=c ... ddin:index
jm
Myrddin v0.88 Release
Moderators: hgm, Rebel, chrisw
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Myrddin v0.88 Release
John Merlino - Myrddin chess engine
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Re: Myrddin v0.88 Release
Hi John, good to see you active again.
I put Myrddin 0.88 on the rack for the Gambit Rating List.
1400 games.
You can follow the progress here - http://rebel13.nl/a/grl.htm
Page automatically refreshes each 30 seconds.
Good start after 19 games.
I put Myrddin 0.88 on the rack for the Gambit Rating List.
1400 games.
You can follow the progress here - http://rebel13.nl/a/grl.htm
Page automatically refreshes each 30 seconds.
Good start after 19 games.
90% of coding is debugging, the other 10% is writing bugs.
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- Posts: 1357
- Joined: Wed Mar 08, 2006 10:15 pm
- Location: San Francisco, California
Re: Myrddin v0.88 Release
Thanks very much, Ed!Rebel wrote: ↑Sun Jul 18, 2021 9:26 pm Hi John, good to see you active again.
I put Myrddin 0.88 on the rack for the Gambit Rating List.
1400 games.
You can follow the progress here - http://rebel13.nl/a/grl.htm
Page automatically refreshes each 30 seconds.
Good start after 19 games.
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- Posts: 1362
- Joined: Sat Jul 21, 2018 7:43 am
- Location: Szentendre, Hungary
- Full name: Gabor Szots
Re: Myrddin v0.88 Release
This must be an April's Fool joke. But if true, which I seriously doubt, thanks John.
Gabor Szots
CCRL testing group
CCRL testing group
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Re: Myrddin v0.88 Release
I know. I can't believe it either!Gabor Szots wrote: ↑Sun Jul 18, 2021 10:01 pm This must be an April's Fool joke. But if true, which I seriously doubt, thanks John.
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Re: Myrddin v0.88 Release
Code: Select all
Gambit Rating List
Running : gauntlet Myrddin 0.88
Time Control : Time control 40/120
Games : 1400
Results from file gauntlet-Myrddin.pgn:
No. Name Win Draw Loss Unf. Score Games %
----------------------------------------------------------
1 Myrddin 0.88 +699 =348 -353 *0 873.0 1400 62.4%
2 Zahak 4.0 +50 =77 -73 *0 88.5 200 44.2%
3 Jumbo 0.6.10 +60 =49 -91 *0 84.5 200 42.2%
4 Monolith 0.3 +53 =51 -96 *0 78.5 200 39.2%
5 Orion 04 +48 =55 -97 *0 75.5 200 37.8%
6 Foxsee 7.20.1 +53 =44 -103 *0 75.0 200 37.5%
7 CT800 1.42 +49 =36 -115 *0 67.0 200 33.5%
8 Jumbo 0.5.3 +40 =36 -124 *0 58.0 200 29.0%
Total Games: 1400
White Wins: 513 (36.6%)
Black Wins: 539 (38.5%)
Draws: 348 (24.9%)
Unfinished: 0 (0.0%)
Estimated ratings for this elo 2489 pool
# PLAYER : RATING POINTS PLAYED (%)
1 Myrddin 0.88 : 2567.3 873.0 1400 62
2 Zahak 4.0 : 2526.8 88.5 200 44
3 Jumbo 0.6.10 : 2512.5 84.5 200 42
4 Monolith 0.3 : 2490.7 78.5 200 39
5 Orion 04 : 2479.6 75.5 200 38
6 Foxsee 7.20.1 : 2477.7 75.0 200 38
7 CT800 1.42 : 2447.1 67.0 200 34
8 Jumbo 0.5.3 : 2410.3 58.0 200 29
90% of coding is debugging, the other 10% is writing bugs.
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- Posts: 1357
- Joined: Wed Mar 08, 2006 10:15 pm
- Location: San Francisco, California
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- Posts: 1362
- Joined: Sat Jul 21, 2018 7:43 am
- Location: Szentendre, Hungary
- Full name: Gabor Szots
Re: Myrddin v0.88 Release
It seems there is a problem with repetition detection. Here is a sample game (played under Arena 3.5.1):
[pgn][Event "Myrddin 0.88 64-bit - Jul 19"]
[Site "Szentendre"]
[Date "2021.07.19"]
[Round "6"]
[White "Yace 0.99.87"]
[Black "Myrddin 0.88 64-bit"]
[Result "1-0"]
[ECO "D32"]
[Opening "QGD Tarrasch"]
[Time "19:46:20"]
[Variation "von Hennig-Schara Gambit, 7.Qxd5 Nc6 8.Bg5"]
[TimeControl "120+1"]
[PlyCount "171"]
1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 5. Qa4+ {+0.74/10 8} Bd7 {-0.25/15
4} 6. Qxd4 {+0.65/11 7} exd5 {-0.39/14 3} 7. Qxd5 {+0.65/10 6} Nc6
{-0.34/13 3} 8. Bg5 {+0.50/10 5} Nf6 {-0.33/13 3} 9. Qd2 {+0.55/9 2} Be7
{-0.34/12 3} 10. Bxf6 {+0.50/9 2} Bxf6 {+0.13/13 3} 11. Rd1 {+0.28/9 4} Be6
{+0.07/13 3} 12. Qxd8+ {+0.10/9 3} Rxd8 {+0.49/15 3} 13. Rxd8+ {+0.07/10 3}
Kxd8 {+0.44/16 3} 14. a3 {+0.18/11 3} Kc7 {+0.44/14 3} 15. e4 {+0.36/9 1}
Re8 {+0.42/13 5} 16. Nge2 {+0.31/10 3} Bb3 {+0.32/12 3} 17. f4 {+0.53/11 3}
Rd8 {+0.41/12 3} 18. e5 {+0.48/11 3} Be7 {+0.36/13 3} 19. Nc1 {+0.49/10 3}
Be6 {+0.38/13 3} 20. Bd3 {+0.39/10 3} Nd4 {+0.29/12 4} 21. O-O {+0.67/10 3}
Nf5 {+0.35/12 2} 22. b4 {+0.81/10 2} h5 {+0.16/11 2} 23. Be4 {+0.87/10 2}
Kb8 {+0.13/12 2} 24. Re1 {+0.81/9 1} Rd4 {+0.03/12 2} 25. Nd3 {+0.82/9 2}
Rc4 {+0.12/14 2} 26. Na4 {+0.67/10 2} b6 {+0.35/14 3} 27. g3 {+0.64/10 2}
g6 {+0.50/13 2} 28. Ndb2 {+0.66/9 1} Rc8 {+0.48/14 2} 29. Nd1 {+0.43/10 2}
h4 {+0.56/14 2} 30. g4 {+0.68/10 1} Nd4 {+0.23/14 2} 31. Ne3 {+0.36/10 2}
Bd7 {+0.20/13 2} 32. Nb2 {+0.85/9 2} h3 {+0.08/13 2} 33. Rd1 {+0.89/10 2}
Ne2+ {+0.08/14 2} 34. Kf1 {+0.83/11 2} Bb5 {-0.04/15 2} 35. Bd3 {+0.92/11
2} Bxd3 {-0.39/16 6} 36. Nxd3 {+0.93/11 2} Nc3 {-0.39/16 2} 37. Rc1
{+0.92/11 2} a5 {-0.35/15 3} 38. g5 {+0.94/10 2} axb4 {-0.22/14 2} 39. Nxb4
{+0.88/10 1} Kb7 {-0.14/15 2} 40. Rc2 {+0.85/10 1} Ne4 {-0.45/15 4} 41. Rb2
{+0.83/10 2} Bc5 {+0.04/13 1} 42. Ned5 {+0.74/10 2} Bg1 {0.00/13 3} 43. Nd3
{+0.90/10 2} Rd8 {-0.02/13 1} 44. Kxg1 {+1.09/11 1} Rxd5 {-0.16/16 1} 45.
Nf2 {+0.98/11 1} Nxf2 {-0.26/17 1} 46. Kxf2 {+1.00/10 2} Rd3 {-0.25/17 2}
47. Re2 {+1.38/12 1} Rxa3 {-0.45/17 2} 48. e6 {+1.18/12 1} fxe6 {-0.44/17
1} 49. Rxe6 {+1.33/13 1} b5 {-0.34/16 2} 50. Rxg6 {+1.20/12 1} b4 {-0.34/16
2} 51. Re6 {+1.22/12 1} b3 {-0.21/15 2} 52. Re1 {+1.19/12 2} Kc7 {-0.30/15
1} 53. Rb1 {+1.13/12 2} Kd6 {-0.32/16 1} 54. Kf3 {+1.18/13 2} b2+ {-0.77/17
1} 55. Kg4 {+1.09/15 1} Rb3 {-0.85/19 1} 56. g6 {+1.28/15 1} Ke7 {-0.78/19
1} 57. Kg5 {+1.28/15 1} Rb4 {-0.32/20 7} 58. f5 {+1.25/14 1} Rb5 {-0.32/20
1} 59. g7 {+0.97/14 1} Kf7 {-0.32/20 1} 60. Kh6 {+0.92/14 1} Rb7 {-0.32/18
1} 61. f6 {+0.92/14 1} Rb4 {0.00/18 2} 62. Rg1 {+0.89/13 1} Rh4+ {0.00/17
1} 63. Kg5 Rb4 {0.00/17 1} 64. Kh5 {+0.89/13 1} Rb8 {0.00/16 1} 65. Rb1
{+0.89/14 1} Rb4 {0.00/19 1} 66. Kh6 {+0.83/13 1} Rh4+ {0.00/19 1} 67. Kg5
Rb4 {0.00/19 1} 68. Kf5 {+0.89/13 1} Rb8 {0.00/19 1} 69. Kf4 {+0.89/14 1}
Kxf6 {0.00/20 1} 70. Rxb2 {+0.98/14 1} Rg8 {0.00/23 1} 71. Rb3 {+0.98/14 0}
Rxg7 {0.00/27 1} 72. Rxh3 {+0.95/14 1} Rg8 {0.00/129 2} 73. Rh6+ {+1.01/12
1} Kf7 {0.00/129 2} 74. h4 {+1.11/13 1} Kf8 {0.00/129 2} 75. h5 {+1.16/13
1} Ke7 {0.00/129 2} 76. Ra6 {+1.25/13 1} Rh8 {0.00/129 2} 77. h6 {+1.43/14
1} Kf7 {0.00/129 2} 78. Kf5 {+1.40/15 1} Rd8 {0.00/129 2} 79. Rf6+
{+1.37/15 1} Kg8 {0.00/129 2} 80. Kg6 {+1.27/16 1} Kh8 {0.00/129 2} 81. Ra6
{+0.08/16 1} Kg8 {0.00/129 2} 82. Rf6 {+0.07/16 0} Kh8 {0.00/129 2} 83. Ra6
{+0.06/16 1} Kg8 {0.00/129 2} 84. Re6 {+0.05/17 1} Kh8 {0.00/129 2} 85. Rc6
{+0.04/16 1} Kg8 {0.00/129 2} 86. Ra6 {+0.05/18 1} ... {Black forfeits on
time} 1-0
[/pgn]
The final position has indeed occurred already 3 times, only the side to move is different.
[pgn][Event "Myrddin 0.88 64-bit - Jul 19"]
[Site "Szentendre"]
[Date "2021.07.19"]
[Round "6"]
[White "Yace 0.99.87"]
[Black "Myrddin 0.88 64-bit"]
[Result "1-0"]
[ECO "D32"]
[Opening "QGD Tarrasch"]
[Time "19:46:20"]
[Variation "von Hennig-Schara Gambit, 7.Qxd5 Nc6 8.Bg5"]
[TimeControl "120+1"]
[PlyCount "171"]
1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 5. Qa4+ {+0.74/10 8} Bd7 {-0.25/15
4} 6. Qxd4 {+0.65/11 7} exd5 {-0.39/14 3} 7. Qxd5 {+0.65/10 6} Nc6
{-0.34/13 3} 8. Bg5 {+0.50/10 5} Nf6 {-0.33/13 3} 9. Qd2 {+0.55/9 2} Be7
{-0.34/12 3} 10. Bxf6 {+0.50/9 2} Bxf6 {+0.13/13 3} 11. Rd1 {+0.28/9 4} Be6
{+0.07/13 3} 12. Qxd8+ {+0.10/9 3} Rxd8 {+0.49/15 3} 13. Rxd8+ {+0.07/10 3}
Kxd8 {+0.44/16 3} 14. a3 {+0.18/11 3} Kc7 {+0.44/14 3} 15. e4 {+0.36/9 1}
Re8 {+0.42/13 5} 16. Nge2 {+0.31/10 3} Bb3 {+0.32/12 3} 17. f4 {+0.53/11 3}
Rd8 {+0.41/12 3} 18. e5 {+0.48/11 3} Be7 {+0.36/13 3} 19. Nc1 {+0.49/10 3}
Be6 {+0.38/13 3} 20. Bd3 {+0.39/10 3} Nd4 {+0.29/12 4} 21. O-O {+0.67/10 3}
Nf5 {+0.35/12 2} 22. b4 {+0.81/10 2} h5 {+0.16/11 2} 23. Be4 {+0.87/10 2}
Kb8 {+0.13/12 2} 24. Re1 {+0.81/9 1} Rd4 {+0.03/12 2} 25. Nd3 {+0.82/9 2}
Rc4 {+0.12/14 2} 26. Na4 {+0.67/10 2} b6 {+0.35/14 3} 27. g3 {+0.64/10 2}
g6 {+0.50/13 2} 28. Ndb2 {+0.66/9 1} Rc8 {+0.48/14 2} 29. Nd1 {+0.43/10 2}
h4 {+0.56/14 2} 30. g4 {+0.68/10 1} Nd4 {+0.23/14 2} 31. Ne3 {+0.36/10 2}
Bd7 {+0.20/13 2} 32. Nb2 {+0.85/9 2} h3 {+0.08/13 2} 33. Rd1 {+0.89/10 2}
Ne2+ {+0.08/14 2} 34. Kf1 {+0.83/11 2} Bb5 {-0.04/15 2} 35. Bd3 {+0.92/11
2} Bxd3 {-0.39/16 6} 36. Nxd3 {+0.93/11 2} Nc3 {-0.39/16 2} 37. Rc1
{+0.92/11 2} a5 {-0.35/15 3} 38. g5 {+0.94/10 2} axb4 {-0.22/14 2} 39. Nxb4
{+0.88/10 1} Kb7 {-0.14/15 2} 40. Rc2 {+0.85/10 1} Ne4 {-0.45/15 4} 41. Rb2
{+0.83/10 2} Bc5 {+0.04/13 1} 42. Ned5 {+0.74/10 2} Bg1 {0.00/13 3} 43. Nd3
{+0.90/10 2} Rd8 {-0.02/13 1} 44. Kxg1 {+1.09/11 1} Rxd5 {-0.16/16 1} 45.
Nf2 {+0.98/11 1} Nxf2 {-0.26/17 1} 46. Kxf2 {+1.00/10 2} Rd3 {-0.25/17 2}
47. Re2 {+1.38/12 1} Rxa3 {-0.45/17 2} 48. e6 {+1.18/12 1} fxe6 {-0.44/17
1} 49. Rxe6 {+1.33/13 1} b5 {-0.34/16 2} 50. Rxg6 {+1.20/12 1} b4 {-0.34/16
2} 51. Re6 {+1.22/12 1} b3 {-0.21/15 2} 52. Re1 {+1.19/12 2} Kc7 {-0.30/15
1} 53. Rb1 {+1.13/12 2} Kd6 {-0.32/16 1} 54. Kf3 {+1.18/13 2} b2+ {-0.77/17
1} 55. Kg4 {+1.09/15 1} Rb3 {-0.85/19 1} 56. g6 {+1.28/15 1} Ke7 {-0.78/19
1} 57. Kg5 {+1.28/15 1} Rb4 {-0.32/20 7} 58. f5 {+1.25/14 1} Rb5 {-0.32/20
1} 59. g7 {+0.97/14 1} Kf7 {-0.32/20 1} 60. Kh6 {+0.92/14 1} Rb7 {-0.32/18
1} 61. f6 {+0.92/14 1} Rb4 {0.00/18 2} 62. Rg1 {+0.89/13 1} Rh4+ {0.00/17
1} 63. Kg5 Rb4 {0.00/17 1} 64. Kh5 {+0.89/13 1} Rb8 {0.00/16 1} 65. Rb1
{+0.89/14 1} Rb4 {0.00/19 1} 66. Kh6 {+0.83/13 1} Rh4+ {0.00/19 1} 67. Kg5
Rb4 {0.00/19 1} 68. Kf5 {+0.89/13 1} Rb8 {0.00/19 1} 69. Kf4 {+0.89/14 1}
Kxf6 {0.00/20 1} 70. Rxb2 {+0.98/14 1} Rg8 {0.00/23 1} 71. Rb3 {+0.98/14 0}
Rxg7 {0.00/27 1} 72. Rxh3 {+0.95/14 1} Rg8 {0.00/129 2} 73. Rh6+ {+1.01/12
1} Kf7 {0.00/129 2} 74. h4 {+1.11/13 1} Kf8 {0.00/129 2} 75. h5 {+1.16/13
1} Ke7 {0.00/129 2} 76. Ra6 {+1.25/13 1} Rh8 {0.00/129 2} 77. h6 {+1.43/14
1} Kf7 {0.00/129 2} 78. Kf5 {+1.40/15 1} Rd8 {0.00/129 2} 79. Rf6+
{+1.37/15 1} Kg8 {0.00/129 2} 80. Kg6 {+1.27/16 1} Kh8 {0.00/129 2} 81. Ra6
{+0.08/16 1} Kg8 {0.00/129 2} 82. Rf6 {+0.07/16 0} Kh8 {0.00/129 2} 83. Ra6
{+0.06/16 1} Kg8 {0.00/129 2} 84. Re6 {+0.05/17 1} Kh8 {0.00/129 2} 85. Rc6
{+0.04/16 1} Kg8 {0.00/129 2} 86. Ra6 {+0.05/18 1} ... {Black forfeits on
time} 1-0
[/pgn]
The final position has indeed occurred already 3 times, only the side to move is different.
Gabor Szots
CCRL testing group
CCRL testing group
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- Posts: 1357
- Joined: Wed Mar 08, 2006 10:15 pm
- Location: San Francisco, California
Re: Myrddin v0.88 Release
Hello Gabor,Gabor Szots wrote: ↑Fri Jul 23, 2021 9:15 am It seems there is a problem with repetition detection. Here is a sample game (played under Arena 3.5.1):
[pgn][Event "Myrddin 0.88 64-bit - Jul 19"]
[Site "Szentendre"]
[Date "2021.07.19"]
[Round "6"]
[White "Yace 0.99.87"]
[Black "Myrddin 0.88 64-bit"]
[Result "1-0"]
[ECO "D32"]
[Opening "QGD Tarrasch"]
[Time "19:46:20"]
[Variation "von Hennig-Schara Gambit, 7.Qxd5 Nc6 8.Bg5"]
[TimeControl "120+1"]
[PlyCount "171"]
1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 5. Qa4+ {+0.74/10 8} Bd7 {-0.25/15
4} 6. Qxd4 {+0.65/11 7} exd5 {-0.39/14 3} 7. Qxd5 {+0.65/10 6} Nc6
{-0.34/13 3} 8. Bg5 {+0.50/10 5} Nf6 {-0.33/13 3} 9. Qd2 {+0.55/9 2} Be7
{-0.34/12 3} 10. Bxf6 {+0.50/9 2} Bxf6 {+0.13/13 3} 11. Rd1 {+0.28/9 4} Be6
{+0.07/13 3} 12. Qxd8+ {+0.10/9 3} Rxd8 {+0.49/15 3} 13. Rxd8+ {+0.07/10 3}
Kxd8 {+0.44/16 3} 14. a3 {+0.18/11 3} Kc7 {+0.44/14 3} 15. e4 {+0.36/9 1}
Re8 {+0.42/13 5} 16. Nge2 {+0.31/10 3} Bb3 {+0.32/12 3} 17. f4 {+0.53/11 3}
Rd8 {+0.41/12 3} 18. e5 {+0.48/11 3} Be7 {+0.36/13 3} 19. Nc1 {+0.49/10 3}
Be6 {+0.38/13 3} 20. Bd3 {+0.39/10 3} Nd4 {+0.29/12 4} 21. O-O {+0.67/10 3}
Nf5 {+0.35/12 2} 22. b4 {+0.81/10 2} h5 {+0.16/11 2} 23. Be4 {+0.87/10 2}
Kb8 {+0.13/12 2} 24. Re1 {+0.81/9 1} Rd4 {+0.03/12 2} 25. Nd3 {+0.82/9 2}
Rc4 {+0.12/14 2} 26. Na4 {+0.67/10 2} b6 {+0.35/14 3} 27. g3 {+0.64/10 2}
g6 {+0.50/13 2} 28. Ndb2 {+0.66/9 1} Rc8 {+0.48/14 2} 29. Nd1 {+0.43/10 2}
h4 {+0.56/14 2} 30. g4 {+0.68/10 1} Nd4 {+0.23/14 2} 31. Ne3 {+0.36/10 2}
Bd7 {+0.20/13 2} 32. Nb2 {+0.85/9 2} h3 {+0.08/13 2} 33. Rd1 {+0.89/10 2}
Ne2+ {+0.08/14 2} 34. Kf1 {+0.83/11 2} Bb5 {-0.04/15 2} 35. Bd3 {+0.92/11
2} Bxd3 {-0.39/16 6} 36. Nxd3 {+0.93/11 2} Nc3 {-0.39/16 2} 37. Rc1
{+0.92/11 2} a5 {-0.35/15 3} 38. g5 {+0.94/10 2} axb4 {-0.22/14 2} 39. Nxb4
{+0.88/10 1} Kb7 {-0.14/15 2} 40. Rc2 {+0.85/10 1} Ne4 {-0.45/15 4} 41. Rb2
{+0.83/10 2} Bc5 {+0.04/13 1} 42. Ned5 {+0.74/10 2} Bg1 {0.00/13 3} 43. Nd3
{+0.90/10 2} Rd8 {-0.02/13 1} 44. Kxg1 {+1.09/11 1} Rxd5 {-0.16/16 1} 45.
Nf2 {+0.98/11 1} Nxf2 {-0.26/17 1} 46. Kxf2 {+1.00/10 2} Rd3 {-0.25/17 2}
47. Re2 {+1.38/12 1} Rxa3 {-0.45/17 2} 48. e6 {+1.18/12 1} fxe6 {-0.44/17
1} 49. Rxe6 {+1.33/13 1} b5 {-0.34/16 2} 50. Rxg6 {+1.20/12 1} b4 {-0.34/16
2} 51. Re6 {+1.22/12 1} b3 {-0.21/15 2} 52. Re1 {+1.19/12 2} Kc7 {-0.30/15
1} 53. Rb1 {+1.13/12 2} Kd6 {-0.32/16 1} 54. Kf3 {+1.18/13 2} b2+ {-0.77/17
1} 55. Kg4 {+1.09/15 1} Rb3 {-0.85/19 1} 56. g6 {+1.28/15 1} Ke7 {-0.78/19
1} 57. Kg5 {+1.28/15 1} Rb4 {-0.32/20 7} 58. f5 {+1.25/14 1} Rb5 {-0.32/20
1} 59. g7 {+0.97/14 1} Kf7 {-0.32/20 1} 60. Kh6 {+0.92/14 1} Rb7 {-0.32/18
1} 61. f6 {+0.92/14 1} Rb4 {0.00/18 2} 62. Rg1 {+0.89/13 1} Rh4+ {0.00/17
1} 63. Kg5 Rb4 {0.00/17 1} 64. Kh5 {+0.89/13 1} Rb8 {0.00/16 1} 65. Rb1
{+0.89/14 1} Rb4 {0.00/19 1} 66. Kh6 {+0.83/13 1} Rh4+ {0.00/19 1} 67. Kg5
Rb4 {0.00/19 1} 68. Kf5 {+0.89/13 1} Rb8 {0.00/19 1} 69. Kf4 {+0.89/14 1}
Kxf6 {0.00/20 1} 70. Rxb2 {+0.98/14 1} Rg8 {0.00/23 1} 71. Rb3 {+0.98/14 0}
Rxg7 {0.00/27 1} 72. Rxh3 {+0.95/14 1} Rg8 {0.00/129 2} 73. Rh6+ {+1.01/12
1} Kf7 {0.00/129 2} 74. h4 {+1.11/13 1} Kf8 {0.00/129 2} 75. h5 {+1.16/13
1} Ke7 {0.00/129 2} 76. Ra6 {+1.25/13 1} Rh8 {0.00/129 2} 77. h6 {+1.43/14
1} Kf7 {0.00/129 2} 78. Kf5 {+1.40/15 1} Rd8 {0.00/129 2} 79. Rf6+
{+1.37/15 1} Kg8 {0.00/129 2} 80. Kg6 {+1.27/16 1} Kh8 {0.00/129 2} 81. Ra6
{+0.08/16 1} Kg8 {0.00/129 2} 82. Rf6 {+0.07/16 0} Kh8 {0.00/129 2} 83. Ra6
{+0.06/16 1} Kg8 {0.00/129 2} 84. Re6 {+0.05/17 1} Kh8 {0.00/129 2} 85. Rc6
{+0.04/16 1} Kg8 {0.00/129 2} 86. Ra6 {+0.05/18 1} ... {Black forfeits on
time} 1-0
[/pgn]
The final position has indeed occurred already 3 times, only the side to move is different.
A threefold repetition can only be claimed if the same player is on the move in all three occurrences, and that player has had an identical list of legal moves in all three occurrences. So a threefold draw could not be claimed if the side to move is different.
As for draw detection in general, I can see that Myrddin had access to TBs, and was scoring the game as a draw starting with move 61. So I don't think there's a problem there.
But the main thing I'm concerned about is Myrddin losing on time. This never happens in my testing. Has it happened more than once? Does the Arena log file have some information about that?
Thanks very much for your testing!
jm
-
- Posts: 1362
- Joined: Sat Jul 21, 2018 7:43 am
- Location: Szentendre, Hungary
- Full name: Gabor Szots
Re: Myrddin v0.88 Release
I regret to report that there were 19 or 20 time forfeits out of 512 games. Unfortunately no log is available. The only thing I can say is that mainbook and tourbook were not used (I deleted them from the Myrddin folder) but a general external book was used.
BTW, as I wrote upstream, this was under Arena where I usually have more time forfeits than other CCRL testers and some engines are particularly sensitive in this regard. Maybe my PC works on its limits.
Gabor Szots
CCRL testing group
CCRL testing group