7.a3?! - LcO 32450

By Horst Sikorsky Date 2019-01-08 14:31

[Event "Najdorf 7.a3, Schnellschach 30m+10s"] [Site "?"] [Date "2019.01.08"] [Round "1.1"] [White "Stockfish 10 64 POPCNT"] [Black "Lc0 v0.20.1-rc2"] [Result "1/2-1/2"] [ECO "B80"] [Annotator "0.58;0.67"] [PlyCount "129"] [EventDate "2019.01.08"] [EventType "tourn"] [SourceTitle "Fritz Engine Tournament"]  {Intel(R) Core(TM) i7-4930K CPU @ 3.40GHz 3400 MHz W=33.8 plies; 8.348kN/s B=14.0 plies; 11kN/s} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. a3 Be7 {[%eval 67,11] [%emt 0:00:40]} 8. f3 {[%eval 58,31] [%emt 0: 01:22] (g4)} h5 {[%eval 59,12] [%emt 0:00:40] (0-0)} 9. Qd2 {[%eval 91,29]  [%emt 0:00:41]} Qc7 {[%eval 59,14] [%emt 0:00:00] (b5)} 10. h3 {[%eval 75,30]  [%emt 0:02:49] (0-0-0)} h4 {[%eval 37,13] [%emt 0:01:23] (b5)} 11. Bd3 { [%eval 84,28] [%emt 0:00:53] (0-0-0)} b5 {[%eval 20,11] [%emt 0:00:40]} 12. O-O {[%eval 77,29] [%emt 0:00:04]} Nbd7 {[%eval 30,15] [%emt 0:01:23] (Lb7)} 13. Bf2 {[%eval 92,31] [%emt 0:01:10] (Tfe1)} Bb7 {[%eval 28,15] [%emt 0:00:34]} 14. Rfe1 {[%eval 73,32] [%emt 0:00:58]} Nh5 {[%eval 25,15] [%emt 0:00:58] (Sc5) } 15. a4 {[%eval 54,31] [%emt 0:03:09]} bxa4 {[%eval 21,15] [%emt 0:00:00]} 16. Nxa4 {[%eval 60,28] [%emt 0:00:49] (Txa4)} O-O {[%eval 2,12] [%emt 0:00:56]} 17. b3 {[%eval 68,31] [%emt 0:00:00] (f4)} Ne5 {[%eval -4,11] [%emt 0:01:57]} 18. Bf1 {[%eval 61,31] [%emt 0:00:00] (c4)} Bf6 {[%eval -16,11] [%emt 0:00:43] (Tfc8)} 19. Ne2 {[%eval 39,28] [%emt 0:00:33] (Tad1)} Ng6 {[%eval -5,11] [%emt 0:01:00]} 20. Ra2 {[%eval 43,31] [%emt 0:00:00] (Tad1)} Rab8 {[%eval -24,12]  [%emt 0:00:43]} 21. c4 {[%eval 42,30] [%emt 0:00:16] (Td1)} Bc6 {[%eval -33,11] [%emt 0:00:36] (Le5)} 22. Rb1 {[%eval 40,27] [%emt 0:00:29]} Rfd8 {[%eval -23, 13] [%emt 0:00:35] (Le5)} 23. Nac3 {[%eval 59,29] [%emt 0:00:15]} Bb7 {[%eval -24,13] [%emt 0:00:17]} 24. Be3 {[%eval 49,31] [%emt 0:00:39] (Tc1)} Re8 { [%eval -23,10] [%emt 0:02:09] (Le5)} 25. Rc1 {[%eval 56,33] [%emt 0:01:03]  (Td1)} Bc8 {[%eval -22,11] [%emt 0:00:13] (Ted8)} 26. Rb1 {[%eval 50,33] [%emt 0:01:16]} Bb7 {[%eval -18,11] [%emt 0:01:05] (Td8)} 27. Rd1 {[%eval 50,33]  [%emt 0:00:37] (Tc1)} Bc8 {[%eval -20,11] [%emt 0:00:58]} 28. Rb2 {[%eval 54, 38] [%emt 0:00:00] (Tb1)} Rd8 {[%eval -24,10] [%emt 0:00:41]} 29. Nd4 {[%eval 36,36] [%emt 0:04:13] (Lg5)} Bb7 {[%eval -24,10] [%emt 0:00:51]} 30. Rc2 { [%eval 53,33] [%emt 0:00:03] (Tc1)} Ng3 {[%eval -25,10] [%emt 0:00:46]} 31. Nde2 {[%eval 27,33] [%emt 0:00:55] (Ld3)} Nh5 {[%eval -24,9] [%emt 0:00:42]} 32. Nd4 {[%eval 54,34] [%emt 0:00:28]} Ng3 {[%eval -7,9] [%emt 0:01:37]} 33. Nde2 {[%eval 40,36] [%emt 0:00:24]} Nh5 {[%eval -3,3] [%emt 0:00:17]} 34. Ra2 { [%eval 40,32] [%emt 0:01:01] (Sd4)} Bc8 {[%eval -26,10] [%emt 0:00:52] (Le5)} 35. Rb1 {[%eval 54,32] [%emt 0:01:17]} Bb7 {[%eval -17,12] [%emt 0:00:27] (Se5) } 36. Rc1 {[%eval 53,33] [%emt 0:00:26]} Bc8 {[%eval -12,10] [%emt 0:00:18]  (Tbc8)} 37. Rb1 {[%eval 53,36] [%emt 0:02:04]} Rd7 {[%eval -7,11] [%emt 0:01: 55] (Lb7)} 38. Ra4 {[%eval 53,31] [%emt 0:00:32] (Sd4)} Bb7 {[%eval -25,10]  [%emt 0:00:38] (Td8)} 39. Rc1 {[%eval 53,34] [%emt 0:00:36]} Qd8 {[%eval -22, 11] [%emt 0:00:19] (Tc8)} 40. Nd4 {[%eval 66,33] [%emt 0:00:39]} Ng3 {[%eval -15,11] [%emt 0:00:40] (Tc8)} 41. Rd1 {[%eval 38,32] [%emt 0:02:27] (Sce2)} Qc8 {[%eval -28,10] [%emt 0:01:25] (Tc8)} 42. Nce2 {[%eval 16,30] [%emt 0:00:20]  (Tc1)} Nxf1 {[%eval -29,15] [%emt 0:00:36]} 43. Rxf1 {[%eval 25,31] [%emt 0:00: 00]} d5 {[%eval -18,15] [%emt 0:00:32]} 44. cxd5 {[%eval 36,32] [%emt 0:00:00]} exd5 {[%eval -14,20] [%emt 0:00:13]} 45. e5 {[%eval 26,35] [%emt 0:00:12]} Nxe5 {[%eval -15,16] [%emt 0:00:25]} 46. Nf4 {[%eval 27,32] [%emt 0:00:15]} Bc6 { [%eval -21,14] [%emt 0:00:33]} 47. Raa1 {[%eval 12,34] [%emt 0:00:07] (Ta2)} Bb5 {[%eval -18,16] [%emt 0:00:52]} 48. Rfc1 {[%eval 14,35] [%emt 0:00:14]} Qe8 {[%eval -14,18] [%emt 0:00:00]} 49. Re1 {[%eval 11,31] [%emt 0:00:22] (Kh1)} g6 {[%eval -44,12] [%emt 0:01:09] (Le7)} 50. Kh1 {[%eval 0,33] [%emt 0:00:19]} Bg7 {[%eval -46,13] [%emt 0:00:30] (Dd8)} 51. Nxb5 {[%eval 24,32] [%emt 0:00:40]  (Tad1)} Rxb5 {[%eval -7,15] [%emt 0:00:50]} 52. Bd4 {[%eval 25,36] [%emt 0:00: 00]} Re7 {[%eval 11,18] [%emt 0:00:38]} 53. Rxa6 {[%eval 9,33] [%emt 0:00:00]} Qc8 {[%eval 14,20] [%emt 0:00:19] (Lh6)} 54. Ra4 {[%eval 23,25] [%emt 0:00:13]} Qf5 {[%eval 15,18] [%emt 0:00:09]} 55. Qd1 {[%eval 43,30] [%emt 0:00:17] (Lf2)} Qxf4 {[%eval -2,19] [%emt 0:00:47] (Kh7)} 56. Bxe5 {[%eval 0,38] [%emt 0:00:41] } Qxe5 {[%eval -6,23] [%emt 0:00:01]} 57. Rxe5 {[%eval 0,40] [%emt 0:00:18]} Bxe5 {[%eval -6,21] [%emt 0:00:01]} 58. f4 {[%eval 0,41] [%emt 0:00:21]} Bf6 { [%eval -5,19] [%emt 0:00:01]} 59. Ra6 {[%eval 0,42] [%emt 0:00:54]} Kg7 { [%eval -2,18] [%emt 0:00:01]} 60. f5 {[%eval 0,43] [%emt 0:00:28]} Reb7 { [%eval -5,17] [%emt 0:00:34]} 61. Rxf6 {[%eval 0,45] [%emt 0:00:00] (fxg6)} Kxf6 {[%eval -6,13] [%emt 0:00:53]} 62. fxg6 {[%eval 0,50] [%emt 0:00:00]} fxg6 {[%eval -5,12] [%emt 0:00:19]} 63. Qd4+ {[%eval 0,49] [%emt 0:00:00]} Ke6 { [%eval -3,11] [%emt 0:01:18] (Kf5)} 64. Qxh4 {[%eval 0,43] [%emt 0:00:28]  (Dg4+)} Rxb3 {[%eval -5,10] [%emt 0:00:01]} 65. Qg4+ {[%eval 0,42] [%emt 0:00: 11] adjud.} 1/2-1/2

Event:

Ort:

Datum:

Weiss:

Schwarz:

Ergebnis

Board

alles andere wie in den letzten 100 Testpartien

By Guenter Stertenbrink Date 2019-01-09 14:07 Edited 2019-01-09 14:10

danke, ich habe jetzt
9.Be2=+0.47d43
9.Qd2=+0.37d43
9.Bc4=+0.26d43
9.Bd3=+0.20d42
nach 8...h5

was meinst du mit
> alles andere wie in den letzten 100 Testpartien

?keine email erhalten

und wuerdest du bitte ? und ! nach 7.a3 vertauschen ?

oder das ? gleich ganz weglassen

Be2,oo,oo,e5,nb3,be6,nd5

By Horst Sikorsky Date 2019-01-10 00:02

ich meine die Hardware und Net 32450 ist gleich.

By Guenter Stertenbrink Date 2019-01-15 06:40

auf Tiefe 50(4) nun (nach 1.e4,c5,2.Nf3,d6,3.d4,cxd4,4.Nxd4,Nf6,5.Nc3,a6,6.Be3,e6,7.a3,Be7,8.f3,h5)

+0.27,9.Bc4,Qc7,10.Qe2,b5,11.Bb3,Nc6,12.Nxc6,Qxc6,13.O-O,O-O
+0.15,9.Qd2,Qc7,10.O-O-O,Nbd7,11.h3,b5,12.Kb1,Rb8,13.Bg5,Nc5
+0.12,9.Be2,Nbd7,10.h3,Qc7,11.Qd2,b5,12.O-O-O,h4,13.Bg5,Nc5
+0.00,9.Bd3,b5,10.Qe2,Qc7,11.O-O-O,Nbd7,12.Kb1,Nc5,13.h3,Nxd3

By Michael Scheidl Date 2019-01-15 11:02

Was ist hier die besondere Rolle von 7.a3?

By Guenter Stertenbrink Date 2019-01-15 12:26 Edited 2019-01-15 12:38

Verhindert b4 , der Sc3 muss e4 decken und d5 erschweren.
Ziel ist g4 zu spielen ohne f3 spielen zu muessen ("English Attack")
Der f-Bauer geht oft gleich mit Tempogewinn nach f4 z.B.
nach 7...b5,8.g4,Lb7,9.Lg2,Sc6,10.g5,Sfd7,11.f4

Es kommt auf die genaue Zugfolge an.
Sofort 7.g4 geht nicht so gut wegen e5.
Nach 7...Le7 ist 8.f3 moeglich, normalerweise stellt man Le7 ja zurueck im
Englischen Angriff und entwickelt zunaechst den Damenfluegel,
ein schwarzer Springer will nach c4.

Ein Trick (Falle) dabei ist : 7...b5,8.g4,e5 ? 9.Sf5,g6,10.Lg2!

http://forum.computerschach.de/cgi-bin/mwf/topic_show.pl?pid=106199

By Guenter Stertenbrink Date 2019-07-10 08:14 Edited 2019-07-10 08:21

https://www.superchess.org/server5
2CPUs , 26kn/s

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.a3
Lc0 v0.21.2-nT40.T8.610 RTX 2080 syzygy: 75min

0.46 , Be7 8.Qe2 h5 9.h3 Qc7 10.0-0-0 Nbd7 11.Kb1 h4 12.Rg1 b5
0.46 , b5 8.g4 Bb7 9.Bg2 Nfd7 10.Qe2 Be7 11.f4 Nc6 12.0-0-0 0-0
0.46 , e5 8.Nb3 Be7 9.h3 Be6 10.Qd2 Nbd7 11.0-0-0 Qc7 12.Kb1 b5
0.47 , h5 8.Bc4 b5 9.Ba2 Bb7 10.f3 Nc6 11.Qe2 Be7 12.0-0-0 Qc7
0.48 , Nc6 8.h3 Be7 9.g4 h6 10.Qd2 Nxd4 11.Qxd4 b5 12.0-0-0 Bb7
0.50 , h6 8.Be2 Nbd7 9.Qd2 b5 10.f3 Bb7 11.0-0-0 h5 12.Kb1 Rc8
0.62 , Bd7 8.g4 h5 9.g5 Ng4 10.Bc1 Nc6 11.Nb3 Na5 12.h3 Ne5
0.72 , Qc7 8.g4 h6 9.h4 h5 10.gxh5 Nxh5 11.Qd2 b5 12.0-0-0 Nd7
0.78 ,Nbd7 8.g4 h6 9.h4 h5 10.gxh5 Nxh5 11.Qe2 Qc7 12.0-0-0 b5
0.81 , b6 8.f3 h5 9.Bc4 Qc7 10.Ba2 b5 11.Qd2 Nbd7 12.0-0-0 Ne5
0.82 , Qa5 8.Qd2 Be7 9.Be2 Nc6 10.0-0-0 0-0 11.Kb1 Qc7 12.g4 Nxd4
0.99 , d5 8.exd5 Nxd5 9.Nxd5 Qxd5 10.Nb3 Qxd1+ 11.Rxd1 Nc6 12.g3 e5
0.99 , g6 8.Qd2 b5 9.f3 h5 10.a4 b4 11.Na2 d5 12.e5 Nfd7
1.11 , Qd7 8.g4 h6 9.f3 b5 10.Qd2 Nc6 11.0-0-0 Bb7 12.h4 d5
1.16 ,Nfd7 8.Bc4 Nc6 9.Qe2 Nde5 10.Bb3 Nxd4 11.Bxd4 Nc6 12.Be3 Be7
1.20 , Qe7 8.g4 h6 9.f3 b5 10.Qd2 Bb7 11.0-0-0 Qc7 12.h4 Nc6