Amoeba vs Drofa - TCEC-S21-QL, a funny game

[abulmo2]

A funny game with a d7 pawn stuck to its original square, a poor Drofa losing all mobility and bringing all its pieces back to the 8th rank into a weird chess960 position at move 21, and a nice final mate.

[pgn][Event "TCEC Season 21 - Qualification League"]
[Site "https://tcec-chess.com"]
[Date "2021.05.11"]
[Round "4.3"]
[White "Amoeba 3.3.1"]
[Black "Drofa 3.0.0"]
[Result "1-0"]
[WhiteElo "3241"]
[BlackElo "3147"]
[ECO "B30"]
[Opening "Sicilian"]
[Variation "Nimzovich-Rossolimo attack (without ...d6)"]
[TimeControl "1800+5"]
[PlyCount "131"]
[GameDuration "01:03:28"]
[GameEndTime "2021-05-11T20:27:52.545 UTC"]
[GameStartTime "2021-05-11T19:24:24.362 UTC"]
[TerminationDetails "White mates"]

{WhiteEngineOptions: Protocol=uci; Threads=176; Hash=65536; OwnBook=false; Ponder=false;, BlackEngineOptions: Protocol=uci; Threads=172; Hash=65536; OwnBook=false; Ponder=false;}
1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. O-O Nge7 5. d4 cxd4 6. Nxd4 Qb6 7. Nxc6
bxc6 8. Be2 Ng6 9. c4 Bc5 10. Nc3 Qc7 11. Na4 Be7 12. c5 Qe5 13. Qc2 Rb8
14. a3 Nf4 15. Bc4 O-O 16. g3 Ng6 17. Bd3 Qh5 18. f4 Bd8 19. Qg2 Nh8 20. b4
f6 21. f5 Qe8 22. Bf4 e5 23. Be3 Nf7 24. Bc4 Be7 25. Qc2 Kh8 26. g4 Qd8 27.
Rad1 Qe8 28. Rd2 h6 29. h4 Qd8 30. Qb3 Qe8 31. Nc3 Ra8 32. Rfd1 Kg8 33. Qa4
Kh7 34. Ba6 Bxa6 35. Qxa6 Rd8 36. b5 h5 37. Qb7 Rb8 38. Qxa7 Nh6 39. Rxd7
Ra8 40. Qb7 Rb8 41. Qa7 Ra8 42. Qb7 Rb8 43. Qxc6 Nxg4 44. Bf2 Rf7 45. Rc7
Qxc6 46. Rxc6 Bf8 47. b6 Rfb7 48. Nd5 Ra8 49. Rb1 Nxf2 50. Kxf2 Ra5 51. Rc7
Rxc7 52. bxc7 Rxc5 53. Rb8 Rxc7 54. Nxc7 Bxa3 55. Ne6 g5 56. hxg5 fxg5 57.
Rb7+ Kh6 58. Rg7 Bc5+ 59. Kf1 Bb4 60. Rg6+ Kh7 61. Nxg5+ Kh8 62. f6 Bf8 63.
f7 Bg7 64. Kg2 h4 65. Kh3 Bf8 66. Rg8# 1-0
[/pgn]

[Guenther]

A funny game with a d7 pawn stuck to its original square, a poor Drofa losing all mobility and bringing all its pieces back to the 8th rank into a weird chess960 position at move 21, and a nice final mate.

A nice game! Also Amoeba used always much less time in that game than Drofa (not sure if the TM should be improved though?)
I didn't know that the QLeague plays now from the start position - I guess they play just games per opponent?

I once made a macro for converting TCEC pgns to compressed readable ones. (Last number is TL = time left in my version)
Already in move 13 Amoeba climbed up to an eval of 1.21 and never looked back from there.
Drofa had already made 3 Q moves in the first 12!?

[pgn][Event "TCEC Season 21 - Qualification League"]
[Site "https://tcec-chess.com"]
[Date "2021.05.11"]
[Round "4.3"]
[White "Amoeba 3.3.1"]
[Black "Drofa 3.0.0"]
[TimeControl "1800+5"]
[Result "1-0"]


1. e4 {0.26/25 1767.841} c5 {0.33/25 1780.190}
2. Nf3 {0.35/27 1724.705} Nc6 {0.27/24 1756.499}
3. Bb5 {0.25/27 1682.329} e6 {0.26/25 1729.343}
4. O-O {0.40/25 1651.341} Nge7 {0.18/26 1701.819}
5. d4 {0.36/30 1591.979} cxd4 {0.24/28 1669.936}
6. Nxd4 {0.33/29 1560.484} Qb6 {0.28/28 1628.020}
7. Nxc6 {0.42/30 1522.553} bxc6 {0.29/27 1541.915}
8. Be2 {0.40/26 1495.052} Ng6 {0.32/25 1509.716}
9. c4 {0.59/28 1458.468} Bc5 {0.22/26 1454.761}
10. Nc3 {0.65/29 1423.159} Qc7 {0.35/28 1388.534}
11. Na4 {0.73/31 1388.640} Be7 {0.45/29 1289.032}
12. c5 {0.89/27 1354.978} Qe5 {0.53/28 1229.218}
13. Qc2 {1.21/27 1321.812} Rb8 {0.65/28 1179.213}
14. a3 {1.23/28 1294.721} Nf4 {1.01/26 1129.337}
15. Bc4 {1.31/29 1263.404} O-O {0.90/28 1055.306}
16. g3 {1.37/30 1237.719} Ng6 {0.99/30 996.462}
17. Bd3 {1.47/30 1172.541} Qh5 {1.05/27 886.178}
18. f4 {1.61/26 1144.287} Bd8 {1.18/29 750.882}
19. Qg2 {1.68/29 1116.758} Nh8 {1.34/29 706.945}
20. b4 {1.83/28 1058.116} f6 {1.32/28 655.046}
21. f5 {1.94/29 1032.720} Qe8 {1.43/28 614.390}
22. Bf4 {2.01/28 1011.747} e5 {1.59/30 578.730}
23. Be3 {1.92/28 990.750} Nf7 {1.59/30 511.121}
24. Bc4 {2.00/28 974.661} Be7 {1.64/30 464.056}
25. Qc2 {2.00/29 951.225} Kh8 {1.66/28 435.837}
26. g4 {2.03/28 928.511} Qd8 {1.69/26 413.869}
27. Rad1 {2.32/27 912.857} Qe8 {1.76/27 376.774}
28. Rd2 {2.32/29 891.115} h6 {1.79/25 355.145}
29. h4 {2.66/32 869.905} Qd8 {1.91/26 341.075}
30. Qb3 {2.86/32 849.001} Qe8 {2.06/26 318.570}
31. Nc3 {2.96/35 834.372} Ra8 {2.29/25 297.220}
32. Rfd1 {2.96/33 814.530} Kg8 {2.33/24 280.013}
33. Qa4 {3.56/29 795.147} Kh7 {2.56/25 266.345}
34. Ba6 {4.15/31 762.242} Bxa6 {2.77/30 249.513}
35. Qxa6 {4.49/32 721.335} Rd8 {3.03/28 238.500}
36. b5 {4.82/29 704.019} h5 {2.77/26 226.416}
37. Qb7 {5.02/30 687.459} Rb8 {2.70/28 196.694}
38. Qxa7 {5.42/32 650.952} Nh6 {2.79/26 179.901}
39. Rxd7 {5.99/31 635.736} Ra8 {3.39/31 171.095}
40. Qb7 {6.20/33 620.900} Rb8 {3.82/29 162.383}
41. Qa7 {6.60/31 609.974} Ra8 {0.00/42 155.720}
42. Qb7 {6.73/33 599.893} Rb8 {0.00/42 145.647}
43. Qxc6 {6.83/34 590.243} Nxg4 {4.69/25 138.591}
44. Bf2 {6.88/34 576.539} Rf7 {5.06/25 132.551}
45. Rc7 {7.18/35 544.789} Qxc6 {5.43/26 128.305}
46. Rxc6 {7.48/34 532.074} Bf8 {5.43/23 123.290}
47. b6 {8.28/31 519.748} Rfb7 {5.60/26 103.661}
48. Nd5 {10.29/32 494.924} Ra8 {6.41/26 97.318}
49. Rb1 {10.59/32 483.480} Nxf2 {6.91/24 93.058}
50. Kxf2 {10.99/33 477.049} Ra5 {8.20/25 81.948}
51. Rc7 {11.89/35 466.021} Rxc7 {9.68/26 77.691}
52. bxc7 {12.09/35 455.180} Rxc5 {11.60/31 74.847}
53. Rb8 {12.81/34 444.683} Rxc7 {14.42/31 73.446}
54. Nxc7 {M77/29 434.428} Bxa3 {15.69/30 71.403}
55. Ne6 {M33/28 424.408} g5 {23.61/32 65.562}
56. hxg5 {M23/27 420.955} fxg5 {M24/39 62.647}
57. Rb7+ {M21/25 423.821} Kh6 {M22/35 61.895}
58. Rg7 {0.00/1 426.755} Bc5+ {M22/33 60.795}
59. Kf1 {M15/21 428.928} Bb4 {M20/38 54.620}
60. Rg6+ {0.00/1 431.790} Kh7 {M14/38 50.672}
61. Nxg5+ {0.00/1 434.095} Kh8 {M12/36 44.989}
62. f6 {0.00/1 436.827} Bf8 {M10/35 44.399}
63. f7 {0.00/1 426.145} Bg7 {M8/34 40.913}
64. Kg2 {0.00/1 429.054} h4 {M4/46 40.713}
65. Kh3 {0.00/1 431.981} Bf8 {M2/50 45.292}
66. Rg8# {M1/5 434.886}
1-0[/pgn]

Edit:
BTW the display of depth 1 and eval 0 while already in winning position between mate scored moves would break some of my tools ;-)

Code: Select all

60. Rg6+ {d=1, sd=1, mt=2138, tl=431790, s=0, n=0, pv=, tb=null, h=0.0, ph=0.0, wv=0.00, R50=46, Rd=-11, Rr=-1000, mb=-1+1-1+1+0,}

[mvanthoor]

Black's problems begin with 8 ... Ng6, allowing c2-c4

Black is in the so-called Maroczy bind, where white has full control of the center with c4 and e4, and black's d7 pawn is backward. Now black has to break this bind, or he will be pushed backward, as you've seen in the game. Black should castle, play Bb7, Ne7 (the knight should have stayed there) and then push d7d5; if white goes Bf3, then Qd8 may be required.

If black can open up the position while the bishop is on b7, he can play his queen around to the king-side for the possible beginnings of an attack.

Instead of Ng6, black should probably have played d7-d5 immediately, and either put the knight on c6 (if white takes, and black plays cxd5), or leave the knight on e7 for now and go g6 and Bg7.