TCEC and CCC highlights

[Chess_Dragon]

From the 4th game below, Stockfish 1-0 Lc0.

TCEC S21 User Submitted Openings Bonus
In progress, data through game 132/616
So far Stockfish head-to-head vs. Lc0 is doing slightly better than it did at the last SuFi.

1. Stockfish 14_202108220915
overall 39.0/67
vs. Lc0v0.28_69722-vf20: 26.5/46, 58%
½11½½½½½
½½½½½1½1
½11½½½½½
01½½01½½
10½½½½½½
½½½½½1 (note: S21 SuFi Stockfish 56%)

Stockfish vs. Lc0 opening-reversed game pairs:
- 7 Stockfish 1.5/2
- all the rest 1.0/2 each (both draws or a win each).

- In all 7 Lc0 got a disadvantage, often in the ending, and then in only a few more moves was lost:

https://tcec-chess.com/#div=vsob21&game=12&season=21
93. Rd1 {TCEC 1.22} Ne5 94. Re1 Re8 95. Bf1 Kb7 96. Re3 Re6 97. Be2 Kc7 98. Bb5 Kb7 99. Bg5 Re8 100. Bf6 Kc7 101. Ke2 Re6 102. Bg5 {TCEC 3.10} Bd5 103. c4 Bc6 104. f4 Nf3 105. Bxc6 Nxg5 106. Bd5 Rxe3+ 107. Kxe3 {TCEC 6.39}

https://tcec-chess.com/#div=vsob21&game=21&season=21
28. Ke2 axb6 {TCEC -1.24} 29. Bc3 Rf8 {TCEC -1.23} 30. a5 bxa5 {TCEC -2.32} 31. Bxa5 Bd6 32. c4 Rb8 {TCEC -3.16} 33. Bc3 Bb4 34. Kd3 Rd8+ 35. Ke4 Bxc3 36. bxc3 Kxe6 {TCEC -4.27}

https://tcec-chess.com/#div=vsob21&game=58&season=21
30. Rcd1 {TCEC 1.95} Rg5 31. fxg4 Qc3 32. Nf5 {TCEC 3.20} Nd7 33. Qf2 f6 34. e5 {TCEC 4.69} Nxe5 35. Nxe7 Nxg4 36. Rxg4 {TCEC 5.25} Rxg4

https://tcec-chess.com/#div=vsob21&game=64&season=21
17. Bb4 {TCEC 0.99} e5 18. fxe5 {TCEC 1.77} Nxe5 19. Be2 Qb6+ 20. c5 {pawn sac.} dxc5 21. Bc3 Qe6 22. Rf5 Ng6 23. Rxf6 {plus exchange sac., TCEC 1.99} gxf6
--See diagram, a sacrificial refutation of 17...e5??
--Note the eval. & WLD differences after 23...gxf6.

https://tcec-chess.com/#div=vsob21&game=76&season=21
25. Rd4 {TCEC 0.94} Nb6 26. Rb4 Rhe8 27. e4 Ra5 28. Bd2 Kf8 29. Kf1 Rea8 30. e5 Nfd5 31. Rd4 Rc5 32. Bd3 Ne7 33. Rb4 Ned5 34. Re4 {TCEC 2.03} h5

[Chess_Dragon]

continued..

https://tcec-chess.com/#div=vsob21&game=77&season=21
29. Bc3 Rf8 {TCEC -0.97} 30. a5 bxa5 {TCEC -2.33} 31. Bxa5 Bd6 32. c4 Rb8 33. Bc3 Bb4 34. Kd3 Rd8+ 35. Ke4 Bxc3 {TCEC -4.17} 36. bxc3 Kxe6 37. Kf4+ Kf6 38. Rb1 Ng7 39. Rb6+ Ne6+ 40. Kg4 Rc8 {TCEC -8.21}

https://tcec-chess.com/#div=vsob21&game=128&season=21
25. Nc4 {TCEC 1.79} Bg4 26. Bc5 Ne7 27. Ne3 Nxd5 28. Rxd5 Bd7 29. Nf5 {TCEC 2.99} Qg8 30. Nxe5 Be6 31. Qa5 Rh7 32. Ne3 Bxe5 33. Rxe5 {TCEC 5.05} Nc6

[Chess_Dragon]

https://www.chess.com/computer-chess-ch ... s&game=253
After 46...Rfe8 {CCC +6.97} 47.Kg1 {CCC +9.21}
So far, it looks like all of Stockfish's wins vs. Dragon involve a blockade attempt and Stockfish breaking it.

CCC Blitz Championship 2021: Semifinals (5|5)
https://www.chess.com/computer-chess-championship#
in progress, though game 314/480

1 Stockfish (3862) 71/106
2 Lc0 (3640) 61.5/106
3 Dragon (3600) 56.5/106
4 Allie (3289) 50.5/106
5 Ethereal (3590) 41/106
6 Stoofvlees (3553) 37.5/106

Stockfish_210812 vs. the others:
13-9 [+4} Lc0
15-7 [+8] Dragon
14.5-7.5 [+7] Allie
15-5 [+10] Ethereal
14.5-6.5 [+8] Stoofvlees

Stockfish has only 2 losses in 106 games, it won the colors-reversed in both.

[sarona]

This is just a test to see if attachments are working.

CCC Blitz Championship 2021: Semifinals Game 398

Lc0_vs_Stockfish_2021.09.05.pgn

(1.07 KiB) Downloaded 219 times

Looks like small file size attachments are working.

[Chess_Dragon]

sarona, just to be certain the game came through here fine.

(That was interesting, it looked one or the other would win, but they both Q'd at the end.)

[Chess_Dragon]

TCEC S21 - Viewer Submitted Openings Bonus
https://tcec-chess.com/#div=vsob21&game=237&season=21
Game #237, Round 10.21
Lc0 0-1 Stockfish , Stockfish has an advantage, though down a pawn, and is winning in just a few moves.
After 17...h5 {TCEC -1.17} through 24...Ne8 {TCEC -4.29} :

Head-to-head, so far, Stockfish vs. Lc0:
55 total opening reversed game pairs
11 @ Sf 1.5/2 <<Decisive game pairs:
0 @ Lc 1.5/2 <<Stockfish has won all 11
32 @ 1.0/2 both draws
12 @ 1.0/2 win each

Code: Select all

    Engine                           Elo    +   -   Games   Score   Av.Op.  Draws

  1 Stockfish 14_202108220915      :   34   38  37   110    55.0 %     -0   66.4 %
  2 LCZero 0.28_69722-vf20         :    0   37  38   110    45.0 %     34   66.4 %

[Chess_Dragon]

CCC - Blitz Championship 2021: Finals (5|5)

Code: Select all

                                Elo    +   -     Games   Score    Draws
  1 Stockfish  :  +95 =153 -52 : 50   28  27  171.5/300  57.2%    51.0%  
  2 Lc0        :  +52 =153 -95 :  0   27  28  128.5/300  42.8%    51.0%

42 busted openings (one color, each engine wins), 28% of games
Actual win-loss:
Stockfish +53 -10 vs Lc0 +10 -53

https://www.chess.com/computer-chess-ch ... s&game=127
Lc0 gave itself even evals. as it was losing and until Stockfish said M23!!


26. Rhg1 {+1.77/44} Qe7 {-0.22/26}
27. Qg6 {+2.45/36} Bxa2 {-0.19/26}
28. bxc5 {+6.74/30} bxc5 {-0.20/24}
29. Nxc5 {+7.84/28} Rxc5 {-0.20/26}
30. Bxd4 {+8.95/30} Re5 {-0.20/25}
31. c4 {+10.53/29} Bxc4 {-0.05/22}
32. Rxf6 {+11.75/28} Bd5 {-0.16/24}
33. Rf3 {+M23/79} Ba5 {-17.45/13} - from CCC pgn

[sarona]

Really nice game from the current 2021 CCC Chess 960 Blitz Championship. (thanks, dkappe)

[Event "CCC Chess 960 Blitz Championship (5|5)"]
[Site "?"]
[Date "2021.09.25"]
[Round "1"]
[White "Dragon 2.5"]
[Black "Lc0"]
[Result "1-0"]
[FEN "nrkqrnbb/pppppppp/8/8/8/8/PPPPPPPP/NRKQRNBB w KQkq - 0 1"]
[GameDuration "00:17:04"]
[GameEndTime "2021-09-25T19:03:52.302 PDT"]
[GameStartTime "2021-09-25T18:46:48.006 PDT"]
[PlyCount "137"]
[SetUp "1"]
[TimeControl "300+5"]
[Variant "fischerandom"]

1. f4 Nb6 2. f5 g6 3. e4 e6 4. Ne3 gxf5 5. exf5 d5 6. Nb3 Nfd7 7. g3 c6 8. Bf2 h6 9. Bg2 Bh7 10. Bh3 Qg5 11. fxe6 fxe6 12. Ng2 e5 13. Be3 Qg8 14. d3 Kc7 15. Qh5 d4 16. Bd2 Rf8 17. Nxd4 exd4 18. Nf4 Rbe8 19. Ne6+ Rxe6 20. Bxe6 Qg6 21. Qa5 Kb8 22. Bxd7 Nxd7 23. Bf4+ Ka8 24. Qc7 Qf7 25. O-O Rg8 26. Bd6 Qe8 27. Rbe1 Qc8 28. Qxc8+ Rxc8 29. Re7 Nf6 30. Rxf6 Bxf6 31. Rxh7 Bg5 32. h4 Be3+ 33. Kg2 a5 34. Rf7 Ka7 35. Rf8 Rxf8 36. Bxf8 Kb8 37. Kf3 Kc7 38. Kg4 Kd7 39. Kh5 Bf2 40. g4 Ke6 41. Bxh6 a4 42. Bf4 Be3 43. Kg5 c5 44. h5 b6 45. h6 Kf7 46. Kf5 Bxf4 47. Kxf4 Kg6 48. g5 b5 49. Ke5 c4 50. dxc4 bxc4 51. h7 Kg7 52. h8=Q+ Kxh8 53. Kxd4 Kg8 54. Kxc4 Kf7 55. Kb5 Kf8 56. Kxa4 Kg7 57. c4 Kf7 58. c5 Ke7 59. c6 Kd8 60. Kb5 Ke7 61. c7 Kd7 62. Kb6 Ke6 63. c8=Q+ Kf7 64. Qf5+ Kg7 65. Qf6+ Kg8 66. Qe7 Kh8 67. Kb5 Kg8 68. g6 Kh8 69. Qh7# 1-0



Really hope Dragon plays Stockfish in the TCEC Superfinal 22 this fall.

[Chess_Dragon]

Dragon 2.5 is 4th here, but it is close and very early on.

https://www.twitch.tv/navratil25

[sarona]

Yes, I have been following nav's Twitch streams.

There was a very nice game in this tournament where Stockfish demolished Lc0 in a Sicilian Najdorf. Castled queenside and launched an assault on the black King.