zullil wrote: ↑Wed Aug 28, 2019 12:19 am
Here's what Stockfish-dev gives with MultiPV = 2 in the position after 24...Rec8 25. Nd2
[d]r1r3k1/3b1ppp/8/1p1p4/nPpP1BP1/4P2P/P2N1P2/2Q3K1 b - - 2 2
-3.31 2... h5 3. gxh5 c3 4. Nb3 c2 5. Nc5 Bf5 6. e4 Bxe4 7. f3 Bf5 8. Qa1 f6 9. Kf2 Kf7 10. Nb7 Ra6 11. Nc5 Ra7 12. h6 gxh6 13. Nxa4 Rxa4 14. a3 h5 15. h4 Rc4 16. Bc1 Ra8 17. Qb2 Bh3 18. Kg3 Bd7 19. Kf2 Rac8 20. a4 bxa4 21. b5 Ra8 22. Qa3 Bxb5 23. Qd6 Bc6 24. Qc7+ Ke6 25. Ba3 Re8 26. Qd6+ Kf5 27. Bc1 Ra8 28. Qf4+ Ke6 29. Ba3 Rc3 30. Bb2 c1=Q 31. Bxc1 a3 32. Qd2 Rb3 33. Qe1+ Kd6 34. Bd2 Rb2 (depth 50, 2:27:32)
-2.84 2... c3 3. Nb3 c2 4. Nc5 Nxc5 5. dxc5 Rxa2 6. Be5 d4 7. exd4 Bc6 8. d5 Bxd5 9. Qg5 f6 10. Bxf6 c1=Q+ 11. Qxc1 gxf6 12. Qd1 Rd8 13. c6 Raa8 14. c7 Rd7 15. Qd3 Rc8 16. Qf5 Rcxc7 17. Qxf6 Rc6 18. Qe5 Rcd6 19. Kh2 h6 20. Qe8+ Kg7 21. Qe5+ Kf7 22. Kg3 Re6 23. Qd4 Bc6 24. Qc3 Rd1 25. Kh4 Rdd6 26. f4 Re4 27. f5 Bd7 28. Kh5 Red4 29. Qb3+ Kf8 30. Kh4 R4d5 31. Qe3 Kf7 32. Qb3 Kg8 33. Qa2 Be8 34. Qa7 (depth 50, 2:27:32)
And here I did let SF run over night at 24...Rec8 again.
Analysis by Brainfish 210819 64 POPCNT:
[d]r1r3k1/3b1ppp/8/1p1p4/nPpP1BP1/4P2P/P4P2/1NQ3K1 w - - 0 1
Code: Select all
25.Dc2 Ta6 26.e4 Tf6 27.Le3 h5
-/+ (-1.50) Tiefe: 7/9 00:00:00 38kN
...
25.Dc2 Ta6 26.f3 c3 27.Lg3 Te6 28.Sa3 Txe3 29.Kf2 Te6 30.Lf4 Tce8 31.Sb1 f6 32.h4 Te1 33.Sxc3 Sxc3 34.Dxc3 T8e2+ 35.Kg3 Tg1+ 36.Kh3 Th1+ 37.Kg3
-+ (-1.89) Tiefe: 14/26 00:00:00 1050kN
25.f3 c3 26.Dc2 Ta6 27.Lg3 Te6 28.Sa3 Txe3 29.Kf2 Te6 30.Lf4 h6 31.h4 Ta6 32.Lc1 Te8 33.Sb1 Tc6 34.Sa3 Tf6
-+ (-1.71) Tiefe: 15/31 00:00:00 1299kN
25.Lg3 c3 26.Dc2 Ta6 27.f3 Te6 28.Sa3 Txe3 29.Kf2 Te6 30.Lf4 Tce8 31.Sb1 Ta6 32.Lc1 Tc8 33.Sa3 h6 34.h4 Sb6 35.Kg3 Ta4 36.Db3 f6 37.h5 Sc4 38.Sxc4 Txc4
-+ (-1.63) Tiefe: 16/31 00:00:00 1833kN
25.Dc2 Ta6 26.e4 Tf6 27.Le3 h5 28.e5 Tf3 29.Kg2 hxg4 30.hxg4 Lxg4 31.Sd2 Lf5 32.Dc1 Th3 33.Sf1 Th4 34.f3 Lh3+ 35.Kf2 Lxf1 36.Dxf1 Tc6 37.Kg3 Th8
-+ (-2.44) Tiefe: 17/32 00:00:00 4477kN
...
25.Dc2 Ta6 26.e4 Tf6 27.Le3 h5 28.Sd2 hxg4 29.h4 Ta6 30.h5 Sb6 31.Sb1 c3 32.e5 Tc4 33.Lc1 Sa4 34.Dd3 g3 35.fxg3 c2 36.Sa3 Tc3 37.Df1 Txg3+ 38.Kf2 Th3 39.e6 Lxe6 40.Dxb5 Ta8 41.Dc6 Tc8 42.Dxa4 Th1 43.Lf4 c1D 44.Lxc1 Tcxc1 45.b5 Th2+ 46.Kg3 Txa2 47.Db3 Tg1+ 48.Kf4 Th2 49.Ke5 Th3
-+ (-2.31) Tiefe: 33/55 00:00:28 564MN
25.Dc2 Ta6
-+ (-2.42 --) Tiefe: 34/16 00:00:34 683MN
25.Kh2
-+ (-2.31 ++) Tiefe: 34/51 00:00:55 1117MN
25.Dc2
-+ (-2.16 ++) Tiefe: 34/56 00:00:59 1182MN
...
25.Dc2 Ta6 26.e4 Tf6 27.Le3 h5 28.g5 Tf3 29.Sa3 Txh3 30.Kg2 dxe4 31.Dxe4 Sc3 32.De5 Th4 33.f3 Te8 34.Dc7 Le6 35.Lf2 Sd5 36.Dc6 Tc8 37.Dxc8+ Lxc8 38.Lxh4 Ld7 39.Le1 Kh7 40.Sb1 Kg6 41.Kg3 Se7 42.Kf2 h4 43.Sc3 Kxg5 44.d5 h3 45.Ld2+ Kg6 46.Se2 Lf5
-+ (-2.43) Tiefe: 36/58 00:01:55 2314MN
25.Dc2
-+ (-2.32 ++) Tiefe: 37/21 00:01:59 2407MN
25.Sa3
-+ (-2.21 ++) Tiefe: 37/65 00:02:42 3268MN
...
25.Sa3 c3 26.Sc2 Sb2 27.a3 h5 28.f3 hxg4 29.hxg4 Sc4 30.Kf2 f6 31.Dd1 g5 32.Lg3 Le8 33.f4 Lg6 34.f5 Lf7 35.Dc1 Kg7 36.Kg2 Te8 37.Lf2 Sd2 38.Le1 Se4 39.Lg3 Th8 40.Se1 Th6 41.Sd3 Tc8 42.Dc2 Sxg3 43.Kxg3 Te8 44.Dc1 c2 45.Sf2 Tc8 46.Kf3 Th2 47.Ke2 Tc3 48.Kf3 Kf8 49.Ke2 Ke7
-+ (-2.16) Tiefe: 37/65 00:03:37 4392MN
...
25.Sd2 h5 26.gxh5 c3 27.Sb3 c2 28.Kh2 Sc3 29.Le5 Tc6 30.Dg1 f6 31.Lf4 Lf5 32.h6 g6 33.e4 Sxe4 34.Df1 Tc4 35.f3 c1T 36.Sxc1 Tc2+ 37.Kg1 Sf2 38.Dxf2 Txf2 39.Kxf2 g5 40.Ld2 Lxh3 41.Se2 Txa2 42.Ke1 Kh7 43.Sc3 Ta1+ 44.Kf2 Le6 45.Sxb5 Ta2 46.Ke3 Lf7 47.Ke2 Kxh6 48.Sd6 Lh5 49.Sf5+ Kh7
-+ (-2.06) Tiefe: 41/105 00:14:55 18314MN
...
25.Sa3 c3 26.Sc2 Sb2 27.a3 h5 28.f3 hxg4 29.hxg4 Sc4 30.Kh2 f6 31.e4 dxe4 32.fxe4 Lxg4 33.Df1 Sxa3 34.Se3 Le6 35.Dg2 c2 36.Sf5 Lxf5 37.exf5 Td8 38.d5 Tac8 39.Lc1 Sb1 40.De2 Sc3 41.De6+ Kh7 42.d6 Tc6 43.De3 Sd5 44.Dh3+ Kg8 45.Dd3 Tdxd6 46.Dxb5 Kf7 47.Db8 Td7 48.b5 Tc4 49.b6 Se7 50.b7 Tb4 51.Da7 Tbxb7
-+ (-2.71) Tiefe: 42/83 00:27:47 34010MN
...
25.Sa3 c3 26.Sc2 Sb2 27.a3 h5 28.f3 hxg4 29.hxg4 Sc4 30.Kh2 f6 31.e4 dxe4 32.fxe4 Lxg4 33.Df1 Sxa3 34.Se3 Le6 35.Sd5 Ta7 36.Sb6 Tc6 37.Sd5 c2 38.Lc1 Sc4 39.Sf4 Lf7 40.Dg2 Tca6 41.Dg4 Ta8 42.Sh5 Lxh5 43.Dxh5 Td6 44.Dc5 Tad8 45.d5 Te8 46.Dxb5 Txe4 47.Dc5 g5 48.Kg3 Kf7 49.b5 Td7 50.Kf2 Kg6
-+ (-2.61) Tiefe: 43/77 00:30:14 37024MN
...
25.Sd2 h5 26.gxh5 c3 27.Sb3 c2 28.Sc5 Lf5 29.e4 Lxe4 30.f3 Lf5 31.Da1 f6 32.Kf2 Kf7 33.Sb7 Ta6 34.Lc1 Lxh3 35.Sc5 Taa8 36.h6 gxh6 37.Sxa4 bxa4 38.Db2 h5 39.b5 Tg8 40.Ke3 Tae8+ 41.Kf4 h4 42.Dxc2 Th8 43.Dxa4 Th5 44.Dc2 Tf5+ 45.Dxf5 Lxf5 46.Kxf5 h3 47.Lf4 Te2 48.a4 h2 49.Lxh2 Txh2 50.a5 Tb2 51.b6 Tb5 52.Kf4
-+ (-2.98) Tiefe: 44/101 00:48:17 59247MN
...
25.Sd2 h5 26.gxh5 c3 27.Sb3 c2 28.Sc5 Lf5 29.e4 Lxe4 30.f3 Lf5 31.Da1 f6 32.Kf2 Kf7 33.Lc1 Lxh3 34.Sb7 Tc6 35.a3 Lf5 36.Da2 Sc3 37.Db3 Te8 38.Sd6+ Txd6 39.Dxc3 Tde6 40.a4 bxa4 41.Dc5 Te1 42.Dxd5+ Le6 43.Db7+ Kg8 44.h6 gxh6 45.Dc6 Lb3 46.Lb2 T8e2+ 47.Kg3 Tb1 48.La3 Tee1 49.Dxf6 Tg1+ 50.Kf4 c1D+ 51.Lxc1 Tgxc1 52.Dxh6 Lf7 53.Dg5+ Kf8 54.Dd8+ Kg7
-+ (-3.11) Tiefe: 48/78 01:41:50 125551MN
25.Sa3
-+ (-3.00 ++) Tiefe: 49/73 01:56:56 144168MN
...
25.Sa3 c3 26.Sc2 Sb2 27.a3 h5 28.f3 hxg4 29.hxg4 Sc4 30.Kf2 f6 31.Dg1 g5 32.Lxg5 fxg5 33.Dh2 Kf7 34.Dh7+ Ke6 35.Dg6+ Ke7 36.e4 Kd8 37.Dxg5+ Kc7 38.Df4+ Kb7 39.Df7 Sb6 40.e5 Tc6 41.Dg7 Tc7 42.Df6 Tg8 43.e6 Le8 44.Df4 Tg6 45.Sa1 Txe6 46.Sb3 Tee7 47.Sc5+ Ka7 48.Dc1 Sc4 49.Dxc3 Te3 50.Dxe3 Sxe3 51.Kxe3 Te7+ 52.Kf4 Te1 53.g5 Tf1 54.Ke5 Txf3 55.Kxd5 Txa3 56.Kd6 Lf7
-+ (-2.86) Tiefe: 49/86 01:58:57 146661MN
...
25.Sa3 c3 26.Sc2 Sb2 27.a3 h5 28.f3 hxg4 29.hxg4 Sc4 30.Kf2 f6 31.Dg1 g5 32.Lxg5 fxg5 33.Dh2 Kf7 34.Dh7+ Ke6 35.Dh6+ Ke7 36.Dxg5+ Kd6 37.e4 Kc7 38.Df4+ Kb7 39.Df7 Sb6 40.e5 Tc6 41.Dh5 Sc4 42.Df7 Tc7 43.e6 Lc6 44.Df5 Kb6 45.g5 Te8 46.g6 Tce7 47.Kg3 Tg8 48.Kf2 Teg7 49.Ke2 Txg6 50.Kd3 Tg2 51.Kxc3 Te2
-+ (-3.25) Tiefe: 50/147 03:18:25 245857MN
...
25.Sa3 c3 26.Sc2 Sb2 27.a3 h5 28.f3 hxg4 29.hxg4 Sc4 30.Kf2 f6 31.Dh1 Le8 32.e4 dxe4 33.d5 Lg6 34.d6 Td8 35.Da1 Sxd6 36.Lxd6 Txd6 37.Dxc3 Td3 38.Dc6 Txf3+ 39.Ke2 Td8 40.Dc7 Tfd3 41.Se3 Td2+ 42.Ke1 Kh8 43.Df4 T2d3 44.Sf5 e3 45.Se7 Lh7 46.Sf5 Lxf5 47.Dxf5 T8d5 48.Dc8+ Kh7 49.g5 Txg5 50.Dc2 Tgd5 51.Ke2 Kg6 52.Dxd3+ Txd3 53.Kxd3 e2 54.Kxe2 Kf7 55.Kd2 g5 56.Ke3 Ke6
-+ (-3.40) Tiefe: 51/133 04:06:48 306297MN
...
25.Sa3
-+ (-2.82 ++) Tiefe: 52/119 04:32:35 338573MN
25.Sc3 Sxc3 26.Dxc3 Te8 27.Db2 Ta6 28.Kg2 Tea8 29.De2 h6 30.e4 Te8 31.Lc1 Txe4 32.Dd2 g5 33.f3 Te7 34.Kg1 f5 35.a4 Tae6 36.Kf2 fxg4 37.hxg4 Tf7 38.Kg2 bxa4 39.Kg3 Tg6 40.Dc3 Kg7 41.Da3 Tgf6 42.De3 Te6 43.Dd2 Lb5 44.Dc2 Tf8 45.Dd2 Tff6 46.Dc2 Kg8 47.Dd2 Te7 48.Dc3 Kg7 49.Dd2 Ta6 50.Dc3 Te2 51.f4 gxf4+ 52.Lxf4 a3
-+ (-3.46) Tiefe: 52/152 04:58:14 370714MN
25.Sa3
-+ (-3.36 ++) Tiefe: 53/91 06:15:42 468058MN
25.Sa3
-+ (-3.25 ++) Tiefe: 53/91 06:15:51 468237MN
25.Sa3 c3 26.Sc2 Sb2 27.a3 h5 28.f3 hxg4 29.hxg4 Sc4 30.Kh2 f6 31.Dd1 g5 32.Lg3 Sxa3 33.f4 Le8 34.fxg5 Sxc2 35.Dxc2 Ta2 36.Dxa2 c2 37.Dxd5+ Lf7 38.Dxb5 c1D 39.Df5 Tc2+ 40.Lf2 Tb2 41.Kg3 Dc7+ 42.Kf3 Dc6+ 43.Kg3 fxg5 44.Dxg5+ Lg6 45.d5 De8 46.d6 Td2 47.Le1 Txd6 48.Lc3 Te6 49.Dd5 De7 50.Le5 Le4 51.Dxe4 Txe5 52.Dg6+ Kf8 53.Dh6+ Ke8 54.Kf4 Kd7 55.Db6 Te4+ 56.Kf3 Txb4 57.Da7+ Ke6 58.Dxe7+ Kxe7 59.g5 Tb1 60.Kg2 Te1
-+ (-3.19) Tiefe: 53/91 06:17:36 470463MN
25.Sa3 c3
-+ (-3.30 --) Tiefe: 54/66 06:38:43 496967MN
24 threads of 12x3GHz, 32G hash, no tbs, started with already full hash after forwarding and backwarding the known best lines.
After 2 hours of switching, 25.Nd2 doesn't come up anymore.
Na3 is kept best for the last four and a half hours except a single line- try with Nc3 after 5 hours.
So 25.Na3 might be best defence for both first moves yet, for 24...c3 as well as for 24...Rec8, latter one just quite as well as the first one therefore as 24th move of Black's, both transposing to each other 2 plies later on.
Peter.