https://www.chess.com/forum/view/chess-openings/najdorf-ideas-needed-mainly-englishhier Najdorf mit 6.f3 e6 ... Pocket Fritz spielte 7.a3 zum Erstaunen des Menschen
es folgte 7...Le7,8.Le3 , wie gehabt, Zugumstellung, Bewertung ist etwa +0.15 bis+0.20d45 .
Aber 7...b5 8.Le3 ergibt 0.00d45
6.f3 e5
Ich fand jetzt 4 Partien mit 7.a3 bei CEGT (von 970000)
Stockfish 7 - Komodo 10 , 4CPU , 40/8
7.a3,b5,8.g4,Lb7,9.Lg2,Sc6
==============================================
***1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6***
7.Qd2
=====
Houdini 11-35
0, 0, 0, 0, 0, 0, 0, 2, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,23, 9,
7.f3
=====
6.Be3,e6,f3=+0.14d30(b5,a3)+0.06d31=+0.00d32(b5,Qd2,Bb7,000,Nbd7,a3,h5)
=+0.00d33(b5,Qd2,Nbd7,000,Bb7,a3,h5)
=+0.00d41(b5,Qd2,Nbd7,000,Bb7,*g4,h6,a3,Rc8,h4,d5)
6.Be3,e6,f3,Nbd7,a3,b5 =+0.00d34(g4,Nb6,Qd2,Nfd7)
6.Be3,e6,f3,Nbd7,a3 =+0.00d35(b5,g4,Nb6,Qd2,Nfd7)
6.Be3,e6,f3,Nbd7 =+0.52d30(g4) =+0.18d32(g4,h6)
6.Be3,e6,f3,b5,g4,h6,a3,Bb7,Qd2,d5 = 0.00d40
1.e4,c5,2.Nf3,d6,3.d4,cxd4,4.Nxd4,Nf6,5.Nc3,a6,
6.Be3,e6,7.f3,b5,8.a3,Bb7,9.Qd2,Nbd7,10.g4,h6,
11.000,Rc8,12.h4,d5=0.00d
Houdini 5: d11-d35 7.f3
26,15, 8, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,18,-12,0,15, 0,17,25,
25,15, 0,10, 6,
d25:0.02b5,0.12h6
d26:0.12b5,0.15h6
d27:0.22b5, ,0.27Be7
d28:0.12b5,0.25h6
d29:0.00b5,0.25h6 b5,a3,Bb7,Qd2,Nbd7,000,d5
d30:0.16b5,0.31h6 b5,a3,Bb7,Qd2,Nbd7,000,Rc8
d31:0.11b5,0.22h6 b5,a3,Bb7,Qd2,Nbd7,000,Rc8
d32:0.00b5,0.19h6 b5,a3,Bb7,Qd2,Nbd7,000,Rc8,Kb1,d5
d33:0.00b5,0.31h6 b5,a3,Bb7,Qd2,Nbd7,000,d5
d34:0.10b5,0.31h6 b5,Qd2,Nbd7,000,Bb7,a3,Rc8,Kb1,h6
d35:0.11b5,0.22d5 b5,a3,Nbd7,g4,Nb6,Qd2,Bb7,g5,Nfd7,000,Rc8,Kb1,d5
d36:0.00b5,0.27h6 b5,a3,Bb7,Qd2,Nbd7,000,Rc8,Kb1,d5
d37:0.00b5,0.18h6 b5,a3,Bb7,Qd2,Nbd7,000,Rc8,Kb1,d5
d38:0.00b5,0.36h6 b5,a3,h5,Qd2,Bb7,000,Nbd7,Be2,Be7,h3,h4
d39:0.00b5, 0.34Qc7 b5,a3,h5,Qd2,Bb7,000,Nbd7,Be2,Be7,h3,h4
d40:0.00b5, b5,Qd2,Nbd7,000,Bb7,g4,h6,a3,Rc8,h4,d5
d41: 0.24h5
d42:0.00b5, b5,Qd2,Nbd7,000,Bb7,Kb1,Rc8,g4,Nb6,Nb3
7.Be2
=====
1.e4,c5,2.Nf3,d6,3.d4,cxd4,4.Nxd4,Nf6,5.Nc3,a6,6.Be3,e6,
7.Be2,Be7,8.O-O,O-O,9.f4 = +0.00d26(e5)9.Kh1 =-0.10d27(Qc7)
1.e4,c5,2.Nf3,d6,3.d4,cxd4,4.Nxd4,Nf6,5.Nc3,a6,6.Be3,e6,
7.Be2,Be7,8.O-O,O-O,9.f4 = +0.00d26(e5)
9.Kh1,Nc6,10.f4,Qc7 =0.03d33(Qe1,Nd4,Bd4,b5,Qg3,Bb7,a3,Bc6,Rae1,Rad8,
Bd3,Qb7,Qh3,h6) =0.00d35
1.e4,c5,2.Nf3,d6,3.d4,cxd4,4.Nxd4,Nf6,5.Nc3,a6,
6.Be3,e6,7.Be2,Be7,8.Qd2=+0.18d33
Houdini 5 , 7.Be2 ,d11-d35
26, 8, 1,16, 2,18, 0,42,46, 6,
11,17,11,15,23, 5,10,20,20,20,
30,23,34,32,26
multipv
========
1.e4,c5,2.Nf3,d6,3.d4,cxd4,4.Nxd4,Nf6,5.Nc3,a6,6.Be3,e6
170117
d29 Be2=0.14,a3=0.14,Qf3=0.18,f3=0.12
d30 Be2=0.22,a3=0.16,Qf3=0.30,g3=0.00
d31 Be2=0.16,a3=0.08,Qf3=0.13,g3=0.00
d32 Be2=0.20,a3=0.29,Qf3=0.04,g3=0.00
d33 Be2=0.12,a3=0.09,Qf3=0.00,g3=0.xx
d33 Be2=0.16,a3=0.09,Qf3=0.00,g3=0.xx
d35 Be2=0.xx,a3=0.xx,Qf3=0.00,g3=0.xx
d40 Be2=0.02,a3=0.22,Qf3=0.00,f3=0.03
170122
d31 Be2=0.20,a3=0.06,Qd2=0.00,f3=0.00 all with f3
d32 Be2=0.08,a3=0.14,Qd2=0.00,f3=0.00 all with f3
d33 Be2=0.05,a3=0.16,Qd2=0.00,f3=0.00
d34 Be2=0.08,a3=0.16,Qd2=0.00,Qf3=0.00
d35 Be2=0.09,a3=0.16,Qd2=0.00,Qf3=0.00
d36 Be2=0.06,a3=0.18,Qd2=0.xx,Qf3=0.xx
d35 Be2=0.18(Nbd7,a4), a3=0.06, Qf3=0.22(Bd7,Qg3), Qd2=0.00
d36 Be2=0.09(Be7,f4,00,Qd3), a3=0.25(b5,g4), Qf3=0.05(Nbd7,Bd3),Qd2=0.00(b5,f3)
d37 Be2=0.10(Nbd7,a4), a3=0.12(Be7,Qe2), Qf3=0.00(Nbd7,a4), Qd2=0.00(b5,f3)
d38 Be2=0.20(Nbd7,a4), a3=0.09(Be7,Qe2), a4=0.00(Be7,g3), Qf3=0.00(Nbd7,a4)
d39 Be2=0.20(Be7,f4), a3=0.16(Be7,Qe2), a4=0.02(Nc6,g3), Qd2=+0.06(b5,f3)
d40 Be2=0.20(Be7,f4,00,g4), a3=0.08(Be7,f3), a4=0.02(Nc6,g3), Qd2=+0.06(b5,f3)
d42 Be2=0.14(Be7,Qd2,00,f3,d5),a3=0.18(Be7,g4,d5),f3=0.00(b5), Qd2=+0.00(b5,f3)
d43 Be2=0.15(Be7,Qd2,00,f3,d5),a3=0.12(Be7,f3,00),Qf3=0.00(b5), Qd2=+0.00(b5,f3)
d44 Be2=0.19(Be7,g4) ,a3=0.18(Be7,g4,d5),Qf3=0.00(b5), Qd2=+0.00(b5,f3)
d45 Be2=0.10(Be7,f4) ,a3=0.23(h6,Be2) ,Qf3=0.00(Nbd7) Qd2=0.00(b5,f3)
d46 Be2=0.08(Be7,f4) ,a3=0.24(h6,Be2)
d46 a3=+0.16 (Be7,f3,00,Be2,b5,Qd2,d5)
d47 a3=+0.14 (Be7,f3,00,Be2,b5,Qd2,d5)
d48 a3=+0.17 (Be7,f3,00,Qd2,d5)
d49 a3=+0.13 (Be7,f3,00,Qd2,d5)
d50 a3=+0.21 (Be7,f3,00,Qd2,d5,e5,Nfd7,f4)
7.a3
====
1.e4,c5,2.Nf3,d6,3.d4,cxd4,4.Nxd4,Nf6,5.Nc3,a6,6.Be3,e6,7.a3
d27:0.17Be7,0.30Nc6,0.36b5,0.41h6
d28:0.16Be7,0.27Nc6,0.43b5,0.47h6
d29:0.20Be7,0.38Nc6,0.43b5,0.23h6
d30:0.14Be7, 0.33b5
d31:0.23Be7,0.41Nc6,0.37b5,0.25h6
d32:0.17Be7,
d33: 0.21b5,0.20h6
d34:0.11Be7, ,0.31h6,0.12Nbd7
d35:0.20Be7,0.38Nc6,0.15b5,0.23h6
d36:0.16Be7,0.26Nc6,0.15b5,0.19h6
d37:0.12Be7,0.33Nc6,0.25b5,0.20h6 b5,g4,Bb7,Bg2
d38:0.16Be7,0.29Nc6,0.35b5,0.20h6 b5,g4,Bb7,Bg2,d5
d39:0.14Be7,0.29Nc6,0.35b5,0.20h6 b5,g4,Bb7,Bg2,d5
d40: ,0.29Nc6, ,0.38h6
d41:0.13Be7,0.36Nc6,0.24b5, ,0.28Nbd7
d42:0.16Be7, ,0.35b5,0.33h6,0.27Nbd7, Be7,Qe2,b5
d43:0.25Be7, ,0.25b5,0.33h6,0.33Nbd7, Be7,g4,d5
d44:0.16Be7,0.35Nc6,0.14b5, ,0.27Nbd7, Be7,Qe2,e5 b5,g4,Bb7,Bg2,h6,f4
d45:0.18Be7, ,0.26b5, 0.27e5 Be7,Qe2,e5
d46:+0.16(Be7,f3,00,Be2,b5,Qd2,d5)
d47:+0.14(Be7,f3,00,Be2,b5,Qd2,d5)
d48:+0.17(Be7,f3,00,Qd2,d5)
d49:+0.13(Be7,f3,00,Qd2,d5)
Houdini 5 , d11-d35 7.a3:
0, 0, 2,23,23,28,15, 0, 0, 0,
0,36, 8,21,18,33,33,37,28,26,
35,40,28,26,50,23,
========================================
6.Be3,e6, =+0.06d30(a3) =+0.
6.Be3,e6, <+0.20d42(a3)
6.Be3,e6, =+0.18d45(a3,Be7,f3,d5,e5,Nfd7,f4)
7.a3 (after e4,c5,Nf3,d6,d4,cd4,Nd4,Nf6,Nc3,a6,Be3,e6)
"prevents" b5 because of 8.g4 (e5,Nf5,g6,Bg2), while
7.g4 directly is not good because of e5=-0.34d31)
7.f3 (what was good after e5,Nb3) doesn't give much
with e6 : b5,a3,Bb7,Qd2,Nbd7,g4,h6,000,Rc8,h4,d5
at CCRL, 2016/08/18
2,Bc4
238,Bd3
897,Be2
94,Qd2
85,Qf3
75,a4
3228,f3
69,f4
743,g4
at FCP
3,Bd3
34,Be2
25,Qd2
2,Qf3
1,a4
64,f3
14,g4
ccrl17a , 6032+395+317+10
3,7.Bc4
249,7.Bd3
1336,7.Be2
111,7.Qd2
2,7.Qe2
95,7.Qf3
87,7.a4
3948,7.f3
93,7.f4
829,7.g4
1,7.h3
6.Be3: all, >2800Elo
20,1,6...Nbd
581,118,6...Nc6
1432,319,6...Ng4
2,0,6...b5
2,1,6...b6
7793,1663,6...e5
6032,1089,6...e6
42,4,6...g6
4,2,6...h5
Computer games with 7.a3 :
[Event "MAD1"]
[Site "Werner"]
[Date "2011.10.31"]
[Round "23"]
[White "Frenzee 3.5.19 x64"]
[Black "Spike 1.2 Turin"]
[Result "1-0"]
[ECO "B80"]
[WhiteElo "2200"]
[BlackElo "2200"]
[PlyCount "94"]
[EventDate "2011.??.??"]
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6
6.Be3 e6 7.a3 Be7 8.Be2 O-O 9.O-O Bd7 10.f4 Nc6
11.Nb3 Qb8 12.g4 Be8 13.Bd3 Nd7 14.Qf3 Nc5 15.Nxc5 dxc5
16.e5 Nd4 17.Qh3 g6 18.Ne4 Bc6 19.Rad1 Rd8 20.Nf6+ Bxf6
[Event "40 Zuege in 8 min"]
[Site "Werner"]
[Date "2012.11.04"]
[Round "24.1"]
[White "Chiron 1.5 x64 1CPU"]
[Black "Gull II beta2 x64 1CPU"]
[Result "1-0"]
[PlyCount "55"]
[EventDate "2012.??.??"]
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6
6.Be3 e6 7.a3 Be7 8.Qf3 Nbd7 9.Be2 O-O 10.O-O-O Qc7
11.g4 d5 12.exd5 Ne5 13.Qg3 Bd6 14.dxe6 Nd3+ 15.Bxd3 Bxg3
16.hxg3 fxe6 17.g5 h6 18.gxf6 Rxf6 19.Rh5 Rf8 20.f4 Qf7
[Event "Naum46_1cpu_haswell"]
[Site "Johan"]
[Date "2014.09.29"]
[Round "41"]
[White "Naum 4.6 x64 1CPU"]
[Black "Senpai 1.0 x64 1CPU"]
[Result "0.5-0.5"]
[ECO "B42"]
[WhiteElo "2840"]
[BlackElo "2844"]
[PlyCount "187"]
[EventDate "2014.??.??"]
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 d6
6.Be3 b5 7.a3 Nf6 8.Bd3 Bb7 9.O-O Nbd7 10.f4 Rc8
11.f5 e5 12.Nb3 Be7 13.Qf3 O-O 14.Rad1 Rxc3 15.bxc3 d5
16.exd5 Qc7 17.Qg3 Nxd5 18.Rde1 Rc8 19.Be4 N7f6 20.Bxd5 Nxd5
[Event "40 Zuege in 8 min"]
[Site "Werner"]
[Date "2016.05.27"]
[Round "52.1"]
[White "Stockfish 7.0 x64 4CPU"]
[Black "Komodo 10 x64 4CPU"]
[Result "0.5-0.5"]
[ECO "B80"]
[PlyCount "225"]
[EventDate "2016.??.??"]
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6
6.Be3 a6 7.a3 b5 8.g4 Bb7 9.Bg2 Nc6 10.g5 Nd7
11.f4 h6 12.h4 hxg5 13.hxg5 Rxh1+ 14.Bxh1 g6 15.Qe2 Na5
16.f5 Qe7 17.f6 Qd8 18.O-O-O Nc4 19.Bf2 Rc8 20.e5 Bxh1