[d]4r1k1/4pp1p/1PPq2p1/pB3n2/1p6/4BQ2/1P3PPP/6K1 b - - 2 30
At TCEC, Texel played 30...Qe5 and lost. Would 30...Nxe3 allowed Black to hold by blockading?
[pgn][Event "TCEC Season 13 - Division 2"]
[Site "http://tcec.chessdom.com"]
[Date "2018.08.20"]
[Round "15.2"]
[White "Ethereal 10.85"]
[Black "Texel 1.08a11"]
[Result "1-0"]
[BlackElo "3273"]
[ECO "D20"]
[GameDuration "01:09:52"]
[GameEndTime "2018-08-20T14:53:15.358 W. Europe Standard Time"]
[GameStartTime "2018-08-20T13:43:23.280 W. Europe Standard Time"]
[Opening "Queen's gambit accepted"]
[PlyCount "80"]
[Termination "adjudication"]
[TerminationDetails "TCEC win rule"]
[TimeControl "1800+10"]
[WhiteElo "3379"]
1. d4 d5 2. c4 dxc4 3. e3 Be6 4. Nc3 c6 5. Be2 Nf6 6. Nf3 b5 7. O-O a5 8. e4 g6 9. d5 cxd5 10. exd5 Bd7 11. a4 b4 12. Nb5 Bg7 13. Bxc4 O-O 14. Ne5 Ne4 15. Re1 Nd6 16. Bf1 Bxe5 17. Rxe5 Bxb5 18. axb5 Nd7 19. Re1 Nf6 20. Qf3 Re8 21. Bg5 Rc8 22. Rad1 Nd7 23. Rc1 Rxc1 24. Rxc1 Nf5 25. Bf4 Nd6 26. Rc6 Nb8 27. Be3 Nxc6 28. dxc6 Nf5 29. b6 Qd6 30. Bb5 Qe5 31. Bc4 Nd6 32. Qd5 Qxb2 33. h3 Qc3 34. Bb3 a4 35. Bxa4 Qa1+ 36. Bd1 b3 37. Qxb3 h5 38. c7 Qe5 39. b7 Nxb7 40. Qxb7 Qa1 1-0[/pgn]
Can Black hold here?
Moderators: hgm, Rebel, chrisw
-
zullil
- Posts: 6442
- Joined: Tue Jan 09, 2007 12:31 am
- Location: PA USA
- Full name: Louis Zulli
-
Eelco de Groot
- Posts: 4561
- Joined: Sun Mar 12, 2006 2:40 am
- Full name:
Re: Can Black hold here?
Hi Louis,
It does not look so good for Black. Maybe Black is already lost here?
4r1k1/4pp1p/1PPq2p1/pB3n2/1p6/4BQ2/1P3PPP/6K1 b - -
Engine: Kaissa IV (512 MB, single thread, i7 6700)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
22/29 0:01 +1.64 30...Nxe3 31.c7 Rc8 32.Qxe3 Rxc7
33.bxc7 Qxc7 34.Ba4 Qd6 35.g4 Qf6
36.Qd2 h6 37.Kg2 Kg7 38.Bd1 Qd6
39.Qxd6 exd6 40.Kg3 d5 41.Kf3 Kf6
42.Bb3 d4 (3.735.171) 1922
23/33 0:02 +1.60 30...Nxe3 31.c7 Rc8 32.Qxe3 Rxc7
33.bxc7 Qxc7 34.f4 Qd6 35.b3 Kg7
36.Kf2 Qf6 37.Kf3 e6 38.Qe5 Qxe5
39.fxe5 f6 40.exf6+ Kxf6 41.Ke4 h5
42.Bc4 (4.819.748) 1916
24/33 0:03 +1.52++ 30...Nxe3 (5.801.326) 1920
24/33 0:03 +1.54 30...Nxe3 31.c7 Rc8 32.Qxe3 Rxc7
33.bxc7 Qxc7 34.f4 Qb8 35.Ba4 Qd6
36.Kf2 Kg7 37.Kf3 Qf6 38.Qe5 Qxe5
39.fxe5 f6 40.exf6+ Kxf6 41.Ke4 Kg7
42.Kd4 Kf6 43.Kc5 e5 (6.009.865) 1904
25/31 0:03 +1.61-- 30...Nxe3 31.c7 (6.159.665) 1908
25/32 0:03 +1.54++ 30...Nxe3 (6.413.152) 1908
25/34 0:03 +1.69-- 30...Nxe3 31.c7 (6.729.494) 1907
25/36 0:03 +1.56++ 30...Nxe3 (6.861.993) 1907
25/36 0:03 +1.57 30...Nxe3 31.c7 Rc8 32.Qxe3 Rxc7
33.bxc7 Qxc7 34.Ba4 Qd6 35.g3 Kg7
36.h4 Qf6 37.Qd2 e6 38.Bd1 Qf5
39.Kg2 Qc5 40.g4 h5 41.g5 Qd5+
42.Qxd5 exd5 43.Kf3 f6 (7.124.422) 1897
26/31 0:04 +1.50++ 30...Qe5 (8.491.433) 1888
26/31 0:04 +1.42++ 30...Qe5 (9.221.592) 1898
26/39 0:05 +1.56 30...Qe5 31.Bf1 Nxe3 32.Qxe3 Qd5
33.Qc1 Qd4 34.b7 Qb6 35.g3 Qc7
36.Qf4 Qxc6 37.b8R Rxb8 38.Qxb8+ Kg7
39.Qa7 Qf6 40.b3 Qe5 41.Bc4 Qe1+
42.Kg2 Qe4+ 43.f3 Qc2+ (9.805.226) 1902
27/37 0:05 +1.56 30...Qe5 31.Bf1 Nxe3 32.Qxe3 Qd6
33.Qc1 Qd4 34.b7 Qb6 35.g3 Qc7
36.Qf4 Qxc6 37.b8R Rxb8 38.Qxb8+ Kg7
39.Qa7 Qf6 40.b3 Qe5 41.Bc4 Qe1+
42.Kg2 Qe4+ 43.f3 Qc2+ (11.265.553) 1910
28/44 0:06 +1.49++ 30...Qe5 (13.197.341) 1923
28/44 0:07 +1.41++ 30...Qe5 (15.427.968) 1956
28/44 0:08 +1.47 30...Qe5 31.Bf1 Nxe3 32.Qxe3 Qd6
33.Qc1 Qd4 34.b7 Qb6 35.g3 Qc7
36.Qf4 Qxc6 37.b8R Rxb8 38.Qxb8+ Kg7
39.Qa7 Qf6 40.b3 Qe5 41.Bc4 e6
42.Qa8 Qc5 43.Kg2 Qf5 (16.039.182) 1958
29/33 0:09 +1.55-- 30...Qe5 31.Bf1 (17.888.888) 1965
29/33 0:09 +1.62-- 30...Qe5 31.Bf1 (18.700.244) 1962
29/35 0:11 +1.64 30...Qe5 31.Ba6 Qd6 32.c7 Nxe3
33.Bb5 Rc8 34.Qxe3 Rxc7 35.bxc7 Qxc7
36.f4 Qd6 37.Kf2 Kg7 38.b3 Qf6
39.Bc4 h5 40.g3 e6 41.Kf3 g5 42.Qe5 Qxe5
43.fxe5 h4 (21.991.120) 1961
30/36 0:12 +1.56++ 30...Qe5 (23.646.892) 1965
30/37 0:14 +1.71-- 30...Qe5 31.Bf1 (29.313.405) 1980
30/37 0:15 +1.60++ 30...Qe5 (31.021.104) 1981
30/37 0:15 +1.58 30...Qe5 31.Bf1 Qd6 32.c7 Nxe3
33.Bb5 Rc8 34.Qxe3 Rxc7 35.bxc7 Qxc7
36.Ba4 Qd6 37.g3 Kg7 38.h4 Qf6
39.Qd2 Qf3 40.Bd1 Qe4 41.f3 Qf5
42.Kg2 Qc5 43.Bb3 e6 (31.497.870) 1979
31/38 0:17 +1.50++ 30...Qe5 (33.783.052) 1985
31/41 0:17 +1.43++ 30...Qe5 (34.677.073) 1990
31/44 0:20 +1.52 30...Qe5 31.Bf1 Qd6 32.c7 Nxe3
33.Bb5 Rc8 34.Qxe3 Rxc7 35.bxc7 Qxc7
36.Ba4 Qd6 37.f4 Qf6 38.Qe5 Qxe5
39.fxe5 Kg7 40.Bb3 f6 41.exf6+ Kxf6
42.Kf2 Ke5 43.Ke3 Kf5 (39.842.900) 1986
32/41 0:24 +1.45++ 30...Qe5 (48.115.684) 2003
32/49 0:25 +1.60-- 30...Qe5 31.Bf1 (50.627.397) 2009
32/49 0:25 +1.48++ 30...Qe5 (52.128.343) 2007
32/49 0:26 +1.53 30...Qe5 31.Bf1 Qd6 32.c7 Nxe3
33.Bb5 Rc8 34.Qxe3 Rxc7 35.bxc7 Qxc7
36.g3 Qd6 37.Qf3 Kg7 38.b3 Qd4
39.Kg2 e6 40.Be8 Qf6 41.Qe3 h5 42.h3 Qf5
43.Bc6 Qf6 (53.065.508) 2004
33/41 0:30 +1.60-- 30...Qe5 31.Bc4 (60.165.211) 2001
33/41 0:32 +1.68-- 30...Qe5 31.Bc4 (64.716.867) 2001
33/41 0:35 +1.62 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 Rb8 34.c7 Qxb6 35.cxb8Q+ Qxb8
36.Qc5 Qd8 37.g3 e6 38.Bc4 Qd2 39.b3 Qe1+
40.Kg2 Qe4+ 41.Kh3 Qf5+ 42.Qxf5 gxf5
43.Kh4 Kf8 (70.830.924) 1997
34/47 0:36 +1.70-- 30...Nxe3 31.Qxe3 (73.654.453) 1998
34/47 0:38 +1.77-- 30...Nxe3 31.Qxe3 (77.186.854) 2001
34/47 0:39 +1.70++ 30...Nxe3 (78.825.667) 2005
34/47 0:41 +1.73 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 Rb8 34.Bb5 Rxb6 35.c7 Rb8
36.cxb8Q+ Qxb8 37.Qc5 Kg7 38.Qd4+ f6
39.Ba4 Qc7 40.Qe3 g5 41.g3 Qe5
42.Qxe5 fxe5 43.Kf1 Kf6 (83.309.286) 2010
35/41 0:45 +1.81-- 30...Nxe3 31.Qxe3 (90.831.963) 2007
35/41 0:46 +1.73++ 30...Nxe3 (92.505.725) 2010
35/41 0:47 +1.70 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 Rb8 34.Bb5 Rxb6 35.c7 Rb8
36.cxb8R+ Qxb8 37.Qc5 e6 38.g3 Qd8
39.Ba4 Kg7 40.Bb3 h5 41.Bc4 Qf6
42.b3 Qf5 43.Qxf5 gxf5 (94.691.563) 2012
.
.
.
52/74 20:16 +1.97 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.Bb5 Rb8 35.b7 Qc7
36.Qg5 Rd8 37.g3 Rb8 38.Qf6 Qb6
39.Ba4 Qc7 40.Qd4 h5 41.Qe4 Kf8
42.Bb3 Kg8 43.Bd1 Kf8 (2.539.423.276) 2086
53/65 28:27 +2.05-- 30...Nxe3 31.Qxe3 (3.542.611.305) 2075
53/65 29:05 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Ba4 Kg8
40.Qf6 h5 41.Qf3 Kf8 42.Qe3 Kg8
43.Qe4 Kf8 (3.624.083.846) 2076
54/49 35:30 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Ba4 Kg8
40.Qf6 h5 41.Qf3 Kf8 42.Qe3 Kg8
43.Qe4 Kf8 (4.430.788.690) 2079
55/58 40:25 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Ba4 Kg8
40.Qf6 h5 41.Qf3 Kf8 42.Qe3 Kg8
43.Qe4 Kf8 (5.051.043.822) 2082
56/39 47:22 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Ba4 Kg8
40.Qf6 h5 41.Qf3 Kf8 42.Qe3 Kg8
43.Qe4 Kf8 (5.946.505.313) 2092
57/63 59:50 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Qf4 e5
40.Qe3 h5 41.Ba4 Rh8 42.Qa7 Rb8
43.Bb3 Kf6 (7.541.005.726) 2100
58/54 76:02 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Qf4 e5
40.Qe3 h5 41.Ba4 Rh8 42.Qa7 Rb8
43.Bb3 Kf6 (9.611.626.460) 2106
59/77 102:00 +2.12 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Qf4 e5
40.Qe3 Rf8 41.Ba4 Rb8 42.Bd1 Rd8
43.Bf3 Kf6 {[d]3r4/1Pq2p1p/2P2kp1/p3p3/1p6/4QBP1/1P3P1P/6K1 w - -And White seems to slowly make progress in the diagrammed position. This is about 3.09 at depth 48}(12.851.599.244) 2099
It does not look so good for Black. Maybe Black is already lost here?
4r1k1/4pp1p/1PPq2p1/pB3n2/1p6/4BQ2/1P3PPP/6K1 b - -
Engine: Kaissa IV (512 MB, single thread, i7 6700)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
22/29 0:01 +1.64 30...Nxe3 31.c7 Rc8 32.Qxe3 Rxc7
33.bxc7 Qxc7 34.Ba4 Qd6 35.g4 Qf6
36.Qd2 h6 37.Kg2 Kg7 38.Bd1 Qd6
39.Qxd6 exd6 40.Kg3 d5 41.Kf3 Kf6
42.Bb3 d4 (3.735.171) 1922
23/33 0:02 +1.60 30...Nxe3 31.c7 Rc8 32.Qxe3 Rxc7
33.bxc7 Qxc7 34.f4 Qd6 35.b3 Kg7
36.Kf2 Qf6 37.Kf3 e6 38.Qe5 Qxe5
39.fxe5 f6 40.exf6+ Kxf6 41.Ke4 h5
42.Bc4 (4.819.748) 1916
24/33 0:03 +1.52++ 30...Nxe3 (5.801.326) 1920
24/33 0:03 +1.54 30...Nxe3 31.c7 Rc8 32.Qxe3 Rxc7
33.bxc7 Qxc7 34.f4 Qb8 35.Ba4 Qd6
36.Kf2 Kg7 37.Kf3 Qf6 38.Qe5 Qxe5
39.fxe5 f6 40.exf6+ Kxf6 41.Ke4 Kg7
42.Kd4 Kf6 43.Kc5 e5 (6.009.865) 1904
25/31 0:03 +1.61-- 30...Nxe3 31.c7 (6.159.665) 1908
25/32 0:03 +1.54++ 30...Nxe3 (6.413.152) 1908
25/34 0:03 +1.69-- 30...Nxe3 31.c7 (6.729.494) 1907
25/36 0:03 +1.56++ 30...Nxe3 (6.861.993) 1907
25/36 0:03 +1.57 30...Nxe3 31.c7 Rc8 32.Qxe3 Rxc7
33.bxc7 Qxc7 34.Ba4 Qd6 35.g3 Kg7
36.h4 Qf6 37.Qd2 e6 38.Bd1 Qf5
39.Kg2 Qc5 40.g4 h5 41.g5 Qd5+
42.Qxd5 exd5 43.Kf3 f6 (7.124.422) 1897
26/31 0:04 +1.50++ 30...Qe5 (8.491.433) 1888
26/31 0:04 +1.42++ 30...Qe5 (9.221.592) 1898
26/39 0:05 +1.56 30...Qe5 31.Bf1 Nxe3 32.Qxe3 Qd5
33.Qc1 Qd4 34.b7 Qb6 35.g3 Qc7
36.Qf4 Qxc6 37.b8R Rxb8 38.Qxb8+ Kg7
39.Qa7 Qf6 40.b3 Qe5 41.Bc4 Qe1+
42.Kg2 Qe4+ 43.f3 Qc2+ (9.805.226) 1902
27/37 0:05 +1.56 30...Qe5 31.Bf1 Nxe3 32.Qxe3 Qd6
33.Qc1 Qd4 34.b7 Qb6 35.g3 Qc7
36.Qf4 Qxc6 37.b8R Rxb8 38.Qxb8+ Kg7
39.Qa7 Qf6 40.b3 Qe5 41.Bc4 Qe1+
42.Kg2 Qe4+ 43.f3 Qc2+ (11.265.553) 1910
28/44 0:06 +1.49++ 30...Qe5 (13.197.341) 1923
28/44 0:07 +1.41++ 30...Qe5 (15.427.968) 1956
28/44 0:08 +1.47 30...Qe5 31.Bf1 Nxe3 32.Qxe3 Qd6
33.Qc1 Qd4 34.b7 Qb6 35.g3 Qc7
36.Qf4 Qxc6 37.b8R Rxb8 38.Qxb8+ Kg7
39.Qa7 Qf6 40.b3 Qe5 41.Bc4 e6
42.Qa8 Qc5 43.Kg2 Qf5 (16.039.182) 1958
29/33 0:09 +1.55-- 30...Qe5 31.Bf1 (17.888.888) 1965
29/33 0:09 +1.62-- 30...Qe5 31.Bf1 (18.700.244) 1962
29/35 0:11 +1.64 30...Qe5 31.Ba6 Qd6 32.c7 Nxe3
33.Bb5 Rc8 34.Qxe3 Rxc7 35.bxc7 Qxc7
36.f4 Qd6 37.Kf2 Kg7 38.b3 Qf6
39.Bc4 h5 40.g3 e6 41.Kf3 g5 42.Qe5 Qxe5
43.fxe5 h4 (21.991.120) 1961
30/36 0:12 +1.56++ 30...Qe5 (23.646.892) 1965
30/37 0:14 +1.71-- 30...Qe5 31.Bf1 (29.313.405) 1980
30/37 0:15 +1.60++ 30...Qe5 (31.021.104) 1981
30/37 0:15 +1.58 30...Qe5 31.Bf1 Qd6 32.c7 Nxe3
33.Bb5 Rc8 34.Qxe3 Rxc7 35.bxc7 Qxc7
36.Ba4 Qd6 37.g3 Kg7 38.h4 Qf6
39.Qd2 Qf3 40.Bd1 Qe4 41.f3 Qf5
42.Kg2 Qc5 43.Bb3 e6 (31.497.870) 1979
31/38 0:17 +1.50++ 30...Qe5 (33.783.052) 1985
31/41 0:17 +1.43++ 30...Qe5 (34.677.073) 1990
31/44 0:20 +1.52 30...Qe5 31.Bf1 Qd6 32.c7 Nxe3
33.Bb5 Rc8 34.Qxe3 Rxc7 35.bxc7 Qxc7
36.Ba4 Qd6 37.f4 Qf6 38.Qe5 Qxe5
39.fxe5 Kg7 40.Bb3 f6 41.exf6+ Kxf6
42.Kf2 Ke5 43.Ke3 Kf5 (39.842.900) 1986
32/41 0:24 +1.45++ 30...Qe5 (48.115.684) 2003
32/49 0:25 +1.60-- 30...Qe5 31.Bf1 (50.627.397) 2009
32/49 0:25 +1.48++ 30...Qe5 (52.128.343) 2007
32/49 0:26 +1.53 30...Qe5 31.Bf1 Qd6 32.c7 Nxe3
33.Bb5 Rc8 34.Qxe3 Rxc7 35.bxc7 Qxc7
36.g3 Qd6 37.Qf3 Kg7 38.b3 Qd4
39.Kg2 e6 40.Be8 Qf6 41.Qe3 h5 42.h3 Qf5
43.Bc6 Qf6 (53.065.508) 2004
33/41 0:30 +1.60-- 30...Qe5 31.Bc4 (60.165.211) 2001
33/41 0:32 +1.68-- 30...Qe5 31.Bc4 (64.716.867) 2001
33/41 0:35 +1.62 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 Rb8 34.c7 Qxb6 35.cxb8Q+ Qxb8
36.Qc5 Qd8 37.g3 e6 38.Bc4 Qd2 39.b3 Qe1+
40.Kg2 Qe4+ 41.Kh3 Qf5+ 42.Qxf5 gxf5
43.Kh4 Kf8 (70.830.924) 1997
34/47 0:36 +1.70-- 30...Nxe3 31.Qxe3 (73.654.453) 1998
34/47 0:38 +1.77-- 30...Nxe3 31.Qxe3 (77.186.854) 2001
34/47 0:39 +1.70++ 30...Nxe3 (78.825.667) 2005
34/47 0:41 +1.73 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 Rb8 34.Bb5 Rxb6 35.c7 Rb8
36.cxb8Q+ Qxb8 37.Qc5 Kg7 38.Qd4+ f6
39.Ba4 Qc7 40.Qe3 g5 41.g3 Qe5
42.Qxe5 fxe5 43.Kf1 Kf6 (83.309.286) 2010
35/41 0:45 +1.81-- 30...Nxe3 31.Qxe3 (90.831.963) 2007
35/41 0:46 +1.73++ 30...Nxe3 (92.505.725) 2010
35/41 0:47 +1.70 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 Rb8 34.Bb5 Rxb6 35.c7 Rb8
36.cxb8R+ Qxb8 37.Qc5 e6 38.g3 Qd8
39.Ba4 Kg7 40.Bb3 h5 41.Bc4 Qf6
42.b3 Qf5 43.Qxf5 gxf5 (94.691.563) 2012
.
.
.
52/74 20:16 +1.97 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.Bb5 Rb8 35.b7 Qc7
36.Qg5 Rd8 37.g3 Rb8 38.Qf6 Qb6
39.Ba4 Qc7 40.Qd4 h5 41.Qe4 Kf8
42.Bb3 Kg8 43.Bd1 Kf8 (2.539.423.276) 2086
53/65 28:27 +2.05-- 30...Nxe3 31.Qxe3 (3.542.611.305) 2075
53/65 29:05 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Ba4 Kg8
40.Qf6 h5 41.Qf3 Kf8 42.Qe3 Kg8
43.Qe4 Kf8 (3.624.083.846) 2076
54/49 35:30 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Ba4 Kg8
40.Qf6 h5 41.Qf3 Kf8 42.Qe3 Kg8
43.Qe4 Kf8 (4.430.788.690) 2079
55/58 40:25 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Ba4 Kg8
40.Qf6 h5 41.Qf3 Kf8 42.Qe3 Kg8
43.Qe4 Kf8 (5.051.043.822) 2082
56/39 47:22 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Ba4 Kg8
40.Qf6 h5 41.Qf3 Kf8 42.Qe3 Kg8
43.Qe4 Kf8 (5.946.505.313) 2092
57/63 59:50 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Qf4 e5
40.Qe3 h5 41.Ba4 Rh8 42.Qa7 Rb8
43.Bb3 Kf6 (7.541.005.726) 2100
58/54 76:02 +2.05 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Qf4 e5
40.Qe3 h5 41.Ba4 Rh8 42.Qa7 Rb8
43.Bb3 Kf6 (9.611.626.460) 2106
59/77 102:00 +2.12 30...Nxe3 31.Qxe3 Qd1+ 32.Bf1 Qd6
33.Qc1 e6 34.b7 Qc7 35.g3 Rb8 36.Ba6 Re8
37.Bb5 Rb8 38.Qg5 Kg7 39.Qf4 e5
40.Qe3 Rf8 41.Ba4 Rb8 42.Bd1 Rd8
43.Bf3 Kf6 {[d]3r4/1Pq2p1p/2P2kp1/p3p3/1p6/4QBP1/1P3P1P/6K1 w - -And White seems to slowly make progress in the diagrammed position. This is about 3.09 at depth 48}(12.851.599.244) 2099
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
-
Eelco de Groot
- Posts: 4561
- Joined: Sun Mar 12, 2006 2:40 am
- Full name:
Re: Can Black hold here?
The diagrammed position at the end of PV again to a large depth. The score is not rising at the moment but has been climbing steadily (more or less) with depth, small intervals where it was steady. I don't see as much FL with this type of search at least I don't think so 
No FL here
[d]3r4/1Pq2p1p/2P2kp1/p3p3/1p6/4QBP1/1P3P1P/6K1 w - -
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.
63/63 183:08 +4.27 1.Qc5 {44. Qc5 in the game} Rb8 2.Qd5 a4 3.Qc4 a3 4.bxa3 bxa3
5.Qa6 Kg7 6.Qxa3 Rd8 7.Qb3 Kf6 8.Qb5 Rf8
9.Qc4 Kg7 10.Bd5 Kh6 11.Qc1+ Kg7
12.Qa1 Rh8 13.Qb1 h5 14.Qb3 (20.431.129.851) 1859
64/69 218:42 +4.35++ 1.Qc5 (24.606.288.739) 1875
64/79 268:32 +4.42++ 1.Qc5 (30.425.958.367) 1888
64/79 338:40 +4.53++ 1.Qc5 (38.541.821.641) 1896
64/85 441:44 +4.67++ 1.Qc5 (50.627.806.564) 1910
64/100 460:34 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (52.862.736.874) 1912
65/40 475:31 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (54.662.848.993) 1915
66/58 516:54 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (59.684.087.493) 1924
67/73 540:15 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (62.515.215.325) 1928
68/53 580:02 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (67.345.364.655) 1935
69/54 663:40 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (77.516.881.390) 1946
This is back earlier in the PV:
[pgn] [Event "TCEC Season 13 - Division 2"] [Site "http://tcec.chessdom.com"] [Date "2018.08.20"] [Round "15.2"] [White "Ethereal 10.85"] [Black "Texel 1.08a11"] [WhiteElo "3379"] [BlackElo "3273"] [ECO "D20"] [Result "1-0"] 1. d4 d5 2. c4 dxc4 3. e3 Be6 4. Nc3 c6 5. Be2 Nf6 6. Nf3 b5 7. O-O a5 8. e4 g6 9. d5 cxd5 10. exd5 Bd7 11. a4 b4 12. Nb5 Bg7 13. Bxc4 O-O 14. Ne5 Ne4 15. Re1 Nd6 16. Bf1 Bxe5 17. Rxe5 Bxb5 18. axb5 Nd7 19. Re1 Nf6 20. Qf3 Re8 21. Bg5 Rc8 22. Rad1 Nd7 23. Rc1 Rxc1 24. Rxc1 Nf5 25. Bf4 Nd6 26. Rc6 Nb8 27. Be3 Nxc6 28. dxc6 Nf5 29. b6 Qd6 30. Bb5 Qe5 (30... Nxe3 31. Qxe3 Qd1+ 32. Bf1 Qd6 33. Qc1 Rb8 {An alternative is 33...e6} 34. b7 Qc7 $8 35. g3 {diagram below}) 31. Bc4 Nd6 32. Qd5 Qxb2 33. h3 Qc3 34. Bb3 a4 35. Bxa4 Qa1+ 36. Bd1 b3 37. Qxb3 h5 38. c7 Qe5 39. b7 Nxb7 40. Qxb7 Qa1 1-0 [/pgn]
[d]1r4k1/1Pq1pp1p/2P3p1/p7/1p6/6P1/1P3P1P/2Q2BK1 b - -
Engine: Kaissa IV (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
68 555:44 +2.75 35...a4 36.Qc2 a3 37.bxa3 bxa3
38.Qa4 Kg7 39.Bg2 Rxb7 40.cxb7 Qc1+
41.Bf1 Qb2 42.h4 a2 43.Qxa2 Qxa2
44.b8Q Qa1 45.Qc7 e6 46.Qc5 Qb2
47.Qe3 Qa1 48.Kg2 Qa8+ (65.589.061.991) 1966
68 555:44 +2.80 35...e6 36.Ba6 Rd8 37.Bb5 Rb8 38.Qd2 Kg7
39.Qf4 e5 40.Qe4 Rf8 41.Qc4 Rb8
42.Qd5 Rd8 43.Qc5 Rd1+ 44.Bf1 Rd2
45.Qb5 Rd8 46.Be2 Rf8 47.Qc4 Kg8
48.Bf3 Kg7 (65.589.061.991) 1966
No FL here[d]3r4/1Pq2p1p/2P2kp1/p3p3/1p6/4QBP1/1P3P1P/6K1 w - -
.
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63/63 183:08 +4.27 1.Qc5 {44. Qc5 in the game} Rb8 2.Qd5 a4 3.Qc4 a3 4.bxa3 bxa3
5.Qa6 Kg7 6.Qxa3 Rd8 7.Qb3 Kf6 8.Qb5 Rf8
9.Qc4 Kg7 10.Bd5 Kh6 11.Qc1+ Kg7
12.Qa1 Rh8 13.Qb1 h5 14.Qb3 (20.431.129.851) 1859
64/69 218:42 +4.35++ 1.Qc5 (24.606.288.739) 1875
64/79 268:32 +4.42++ 1.Qc5 (30.425.958.367) 1888
64/79 338:40 +4.53++ 1.Qc5 (38.541.821.641) 1896
64/85 441:44 +4.67++ 1.Qc5 (50.627.806.564) 1910
64/100 460:34 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (52.862.736.874) 1912
65/40 475:31 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (54.662.848.993) 1915
66/58 516:54 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (59.684.087.493) 1924
67/73 540:15 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (62.515.215.325) 1928
68/53 580:02 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (67.345.364.655) 1935
69/54 663:40 +4.67 1.Qc5 Rb8 2.Qd5 Ke7 3.Bd1 Rd8 4.Qc5+ Kf6
5.Bb3 Kg7 6.Bd5 Rf8 7.Qc4 b3 8.Qxb3 Rd8
9.Qf3 Rf8 10.Kg2 Qd8 11.Qe4 Qc7
12.Qd3 Qd6 13.Qc4 Qc7 14.Kg1 (77.516.881.390) 1946
This is back earlier in the PV:
[pgn] [Event "TCEC Season 13 - Division 2"] [Site "http://tcec.chessdom.com"] [Date "2018.08.20"] [Round "15.2"] [White "Ethereal 10.85"] [Black "Texel 1.08a11"] [WhiteElo "3379"] [BlackElo "3273"] [ECO "D20"] [Result "1-0"] 1. d4 d5 2. c4 dxc4 3. e3 Be6 4. Nc3 c6 5. Be2 Nf6 6. Nf3 b5 7. O-O a5 8. e4 g6 9. d5 cxd5 10. exd5 Bd7 11. a4 b4 12. Nb5 Bg7 13. Bxc4 O-O 14. Ne5 Ne4 15. Re1 Nd6 16. Bf1 Bxe5 17. Rxe5 Bxb5 18. axb5 Nd7 19. Re1 Nf6 20. Qf3 Re8 21. Bg5 Rc8 22. Rad1 Nd7 23. Rc1 Rxc1 24. Rxc1 Nf5 25. Bf4 Nd6 26. Rc6 Nb8 27. Be3 Nxc6 28. dxc6 Nf5 29. b6 Qd6 30. Bb5 Qe5 (30... Nxe3 31. Qxe3 Qd1+ 32. Bf1 Qd6 33. Qc1 Rb8 {An alternative is 33...e6} 34. b7 Qc7 $8 35. g3 {diagram below}) 31. Bc4 Nd6 32. Qd5 Qxb2 33. h3 Qc3 34. Bb3 a4 35. Bxa4 Qa1+ 36. Bd1 b3 37. Qxb3 h5 38. c7 Qe5 39. b7 Nxb7 40. Qxb7 Qa1 1-0 [/pgn]
[d]1r4k1/1Pq1pp1p/2P3p1/p7/1p6/6P1/1P3P1P/2Q2BK1 b - -
Engine: Kaissa IV (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
68 555:44 +2.75 35...a4 36.Qc2 a3 37.bxa3 bxa3
38.Qa4 Kg7 39.Bg2 Rxb7 40.cxb7 Qc1+
41.Bf1 Qb2 42.h4 a2 43.Qxa2 Qxa2
44.b8Q Qa1 45.Qc7 e6 46.Qc5 Qb2
47.Qe3 Qa1 48.Kg2 Qa8+ (65.589.061.991) 1966
68 555:44 +2.80 35...e6 36.Ba6 Rd8 37.Bb5 Rb8 38.Qd2 Kg7
39.Qf4 e5 40.Qe4 Rf8 41.Qc4 Rb8
42.Qd5 Rd8 43.Qc5 Rd1+ 44.Bf1 Rd2
45.Qb5 Rd8 46.Be2 Rf8 47.Qc4 Kg8
48.Bf3 Kg7 (65.589.061.991) 1966
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
-
zullil
- Posts: 6442
- Joined: Tue Jan 09, 2007 12:31 am
- Location: PA USA
- Full name: Louis Zulli
Re: Can Black hold here?
Thanks for the analysis. Might revisit this later myself.Eelco de Groot wrote: ↑Tue Aug 21, 2018 7:17 am The diagrammed position at the end of PV again to a large depth. The score is not rising at the moment but has been climbing steadily (more or less) with depth, small intervals where it was steady. I don't see as much FL with this type of search at least I don't think so
[d]3r4/1Pq2p1p/2P2kp1/p3p3/1p6/4QBP1/1P3P1P/6K1 w - -