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Up Topic The Rybka Lounge / Test Positions / TCEC: AllieStien draws a won Queen-and-pawns ending
- By MrKris (***) Date 2020-10-26 07:30
TCEC S19 - GPU Viewer Submitted Openings Bonus 1
https://tcec-chess.com/#div=gvsob1&game=30&season=19
Rd. 30.1    Stoofvless 1/2-1/2 AllieStein

After 57...f5 AllieStein had a winning game but played 58.c6?? allowing perpetual check.
The kibitzer Crystal's evaluation immediately changed from +6.26 to 0.00.

Here, (move 58. called 1.) Lc0 did the same:
[Event "G/10'+5'' 8GBh Sy.6"]
[Site "R7 2700X | RTX 2060"]
[Date "2020.10.25"]
[Round ""]
[White "Lc0v0.26.3_J92-270"]
[Black "Cfish-201024-PureC0"]
[Result "1/2-1/2"]
[FEN "4k3/6p1/1K1Q4/2P2p2/7p/8/6P1/4q3 w - - 0 1"]
[SetUp "1"]
[Termination "normal"]
[TimeControl "600+5"]

1. c6 {?? +0.53/14 15s} Qf2+ {0.00/45 12s ---Note Cfish's evaluation---} 2. Ka6 {+0.44/18 16s}
Qa2+ {0.00/52 6.9s} 3. Kb7 {+0.40/20 18s} Qxg2 {0.00/57 9.7s}
4. Qe6+ {+0.40/25 0.28s} Kf8 {0.00/57 7.1s} 5. Qxf5+ {+0.39/20 16s}
Kg8 {0.00/62 15s} 6. Kb6 {+0.41/20 5.1s} Qb2+ {0.00/60 16s User Adjudication} 1/2-1/2

However Xiphos did not have any difficulties:
[Event "G/10'+5'' 8GBh Sy.6"]
[Site "R7 2700X | RTX 2060"]
[Date "2020.10.25"]
[Round ""]
[White "Xiphos-0.6"]
[Black "Cfish-201024-PureC0"]
[Result "1-0"]
[FEN "4k3/6p1/1K1Q4/2P2p2/7p/8/6P1/4q3 w - - 0 1"]
[PlyCount "87"]
[SetUp "1"]
[TimeControl "600+5"]

1. Qc6+ {+1.62/26 63s} Ke7 {-8.38/33 31s ~~BAD FOR BLACK~~} 2. Qc7+ {+4.29/26 37s}
Ke8 {-10.10/33 33s} 3. Ka7 {+5.13/23 17s} Qf2 {-11.33/37 60s}
4. Qc6+ {+5.81/23 18s} Ke7 {-11.82/33 32s} 5. Qd6+ {+6.20/23 14s}
Kf7 {-11.94/30 10s} 6. Qd5+ {+7.33/24 13s} Ke7 {-13.24/35 83s}
7. Ka8 {+8.77/24 16s} Kf6 {-13.70/36 25s} 8. Kb7 {+9.69/24 13s}
Qb2+ {-14.20/37 31s} 9. Kc8 {+10.41/24 13s} Qb4 {-15.24/37 63s}
10. c6 {+11.72/24 16s} Qe4 {-15.24/30 4.1s} 11. Qd6+ {+12.56/25 13s}
Kf7 {-15.92/32 24s} 12. Qd7+ {+13.27/24 17s} Kg6 {-17.47/31 89s}
13. Kb8 {+15.05/26 18s} Qe5+ {-16.86/26 78s} 14. c7 {+21.15/24 11s}
Kf6 {-28.83/28 68s} 15. Kb7 {+160.87/24 135s} Qb2+ {-31.12/26 10s}
16. Kc8 {+19.54/17 24s} h3 {-145.10/29 27s} 17. Qd6+ {+M41/19 51s}
Kg5 {-152.58/35 2.0s} 18. gxh3 {+M37/18 7.7s} Kh5 {-152.59/31 4.2s}
19. Kd8 {+M29/20 8.0s} Qb3 {-M28/47 4.5s} 20. c8=Q {+M25/22 8.4s}
Qg8+ {-M26/54 1.4s} 21. Kc7 {+M23/27 13s} Qc4+ {-M24/245 1.5s}
22. Qc6 {+M21/29 7.1s} Qxc6+ {-M20/63 1.8s} 23. Kxc6 {+M17/31 7.3s}
Kg5 {-M18/58 2.1s} 24. h4+ {+298.63/1 0.34s} Kg4 {-M20/57 3.6s}
25. h5 {+298.63/1 0.068s} Kg5 {-M18/59 2.5s} 26. h6 {+298.63/1 0.17s}
gxh6 {-M20/69 2.6s} 27. Qe6 {+298.63/1 0.013s} h5 {-M18/67 2.9s}
28. Kb7 {+298.63/1 0s} f4 {-M32/22 3.0s} 29. Ka8 {+298.63/1 0s}
f3 {-M26/68 3.1s} 30. Qe4 {+298.63/1 0s} f2 {-M24/78 3.3s}
31. Qe3+ {+298.63/1 0s} Kg4 {-M22/79 3.3s} 32. Qxf2 {+298.63/1 0.001s}
h4 {-M20/93 3.4s} 33. Kb8 {+298.63/1 0.001s} h3 {-M20/63 3.5s}
34. Ka8 {+298.63/1 0s} h2 {-M20/80 3.7s} 35. Qxh2 {+298.63/1 0s}
Kf3 {-M18/104 3.8s} 36. Ka7 {+298.63/1 0s} Ke3 {-M16/146 3.9s}
37. Kb6 {+298.63/1 0.001s} Ke4 {-M14/210 4.0s} 38. Kc5 {+298.63/1 0s}
Kd3 {-M12/245 0.50s} 39. Qe5 {+298.63/1 0s} Kc2 {-M10/245 0.26s}
40. Kb4 {+298.63/1 0s} Kd3 {-M8/245 0.045s} 41. Kb3 {+298.63/1 0s}
Kd2 {-M6/16 0s} 42. Qe4 {+298.63/1 0s} Kd1 {-M4/245 0.007s}
43. Kc3 {+298.63/1 0s} Kc1 {-M2/173 0.002s} 44. Qc2# {+298.63/1 0s, White mates} 1-0
- By MrKris (***) Date 2020-10-26 17:07
About the TCEC game, my last post this thread:

Lc0 0.26.3 J92-270
G/2 hours
4k3/6p1/1K1Q4/2P2p2/7p/8/6P1/4q3 w - - 0 1

Lc0's time management really moves quickly:
-- through 26 seconds it had AllieStein's 58.c6??
-- at 33 seconds it found the correct 58.Qc6+(!) +-
-- it played the move quickly, for the T/C, at 1:13 with a low +0.61 evaluation
Up Topic The Rybka Lounge / Test Positions / TCEC: AllieStien draws a won Queen-and-pawns ending

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