### Re: analysis of 1.e4 e5 2.Nf3 f6

Posted:

**Sun Aug 12, 2018 11:25 pm**Looks like Stockfish doesn't change it's mind after 60+ plys it still likes 3.Nf3xe5 and the eval doeasn't really change either:

Stockfish_18080817_x64_bmi2:

56/84 12:48:05 1,152,343,267k 25,004k +1.82 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Nb8-c6 6.Nb1-c3 Bc8-e6 7.Bc1-e3 d5xe4 8.d3xe4 a7-a6 9.Nc3-d5 Qe7-d7 10.c2-c4 Bf8-b4+ 11.Nd5xb4 Qd7xd1+ 12.Ra1xd1 Nc6xb4 13.Nf3-d4 Be6-d7 14.a2-a3 Nb4-c6 15.Nd4xc6 Bd7xc6 16.f2-f3 Ng8-e7 17.Be3-f4 Ra8-c8 18.Bf1-e2 Ke8-f7 19.Bf4-g3 Rh8-e8 20.b2-b4 Bc6-a4 21.Rd1-d2 h7-h5 22.h2-h4 Ne7-g6 23.Ke1-f2 Ng6-e5 24.Kf2-e3 Rc8-d8 25.Rd2-d5 Ba4-c6 26.Rd5xd8 Re8xd8 27.b4-b5 Bc6-e8 28.a3-a4 Kf7-e7 29.b5xa6 b7xa6 30.Rh1-b1 Be8xa4 31.Rb1-a1 Ba4-b3 32.Bg3xe5 f6xe5 33.Ra1-a5 Ke7-e6 34.Ra5xa6+ Rd8-d6 35.Ra6-a7 Ke6-d7 36.c4-c5

57/76+ 13:03:16 1,175,489,147k 25,012k +1.89 3.Nf3xe5

57/76+ 14:50:34 1,337,490,139k 25,030k +1.97 3.Nf3xe5

57/78 15:38:47 1,409,756,668k 25,028k +1.86 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Nb8-c6 6.Nb1-c3 Bc8-e6 7.Bc1-e3 d5xe4 8.d3xe4 a7-a6 9.Nc3-d5 Qe7-d7 10.c2-c4 Bf8-b4+ 11.Nd5xb4 Qd7xd1+ 12.Ra1xd1 Nc6xb4 13.Nf3-d4 Be6-d7 14.a2-a3 Nb4-c6 15.Nd4xc6 Bd7xc6 16.f2-f3 Ng8-e7 17.Bf1-e2 Ne7-g6 18.b2-b4 Ng6-e5 19.h2-h3 O-O 20.Rd1-d4 Ra8-d8 21.Ke1-f2 Bc6-a4 22.Rh1-c1 Rf8-e8 23.Rd4-d5 Ba4-c6 24.Rd5-d2 Bc6-a4 25.h3-h4 Rd8xd2 26.Be3xd2 Re8-d8 27.Kf2-e3 h7-h5 28.Bd2-c3 Kg8-f7 29.Rc1-f1 Kf7-e6 30.g2-g3 Rd8-h8 31.Rf1-b1 Rh8-d8 32.Rb1-c1 g7-g6 33.Bc3-b2 Ke6-f7 34.Bb2xe5 f6xe5 35.f3-f4 Kf7-f6 36.b4-b5 a6xb5 37.c4xb5

58/82- 21:22:58 1,926,744,090k 25,030k +1.79 3.Nf3xe5 Qd8-e7

58/82+ 21:26:34 1,932,187,107k 25,030k +1.86 3.Nf3xe5

58/82 22:07:09 1,992,935,956k 25,028k +1.89 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Bc8-e6 6.Bc1-e3 Nb8-c6 7.Nb1-c3 d5xe4 8.d3xe4 a7-a6 9.Nc3-d5 Qe7-d7 10.c2-c4 Bf8-b4+ 11.Nd5xb4 Qd7xd1+ 12.Ke1xd1 Nc6xb4 13.Kd1-d2 Nb4-c6 14.Kd2-c3 Ng8-h6 15.Bf1-e2 Be6-d7 16.Nf3-d4 a6-a5 17.Nd4xc6 Bd7xc6 18.f2-f3 Nh6-f7 19.b2-b3 O-O-O 20.Be3-d4 b7-b6 21.h2-h4 Rh8-e8 22.Rh1-e1 Rd8-d7 23.Ra1-d1 h7-h5 24.Bd4-f2 Nf7-e5 25.Rd1xd7 Kc8xd7 26.a2-a4 Re8-b8 27.Bf2-d4 Kd7-e6 28.f3-f4 Ne5-g4 29.g2-g3 Ke6-f7 30.c4-c5 b6-b5 31.Be2xb5 Bc6xb5 32.a4xb5 Rb8xb5 33.Re1-a1 Kf7-e8 34.c5-c6

59/91- 22:46:49 2,052,610,985k 25,029k +1.82 3.Nf3xe5 Qd8-e7

59/91+ 23:16:30 2,097,400,175k 25,031k +1.89 3.Nf3xe5

59/91 31:02:34 2,805,146,823k 25,101k +1.90 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 d5xe4 6.d3xe4 Qe7xe4+ 7.Bf1-e2 Nb8-c6 8.Nb1-c3 Qe4-e6 9.O-O Bc8-d7 10.Bc1-f4 O-O-O 11.Nc3-b5 Nc6-e5 12.Nb5xa7+ Kc8-b8 13.Na7-b5 Bf8-c5 14.b2-b4 Bc5-b6 15.a2-a4 Ng8-e7 16.Qd1-c1 Ne7-g6 17.Nf3-d4 Bb6xd4 18.Nb5xd4 Ng6xf4 19.Qc1xf4 Qe6-d5 20.Rf1-d1 Ne5-c6 21.Nd4xc6+ Qd5xc6 22.b4-b5 Qc6-c5 23.c2-c4 Rh8-e8 24.Be2-f1 Bd7-c8 25.a4-a5 Qc5-g5 26.Qf4xg5 f6xg5 27.Rd1xd8 Re8xd8 28.Ra1-e1 g5-g4 29.f2-f3 g4xf3 30.g2xf3 g7-g6 31.Re1-e7 h7-h5 32.h2-h4 Rd8-d4 33.Re7-e4 Rd4-d8 34.Kg1-f2 Bc8-f5 35.Re4-e7 Kb8-c8 36.c4-c5 Rd8-d2+ 37.Kf2-g3 Rd2-a2 38.b5-b6 c7xb6 39.a5xb6 Ra2-c2

60/79- 37:29:07 3,393,453,058k 25,146k +1.83 3.Nf3xe5 Qd8-e7

60/79+ 39:30:27 3,575,011,313k 25,136k +1.90 3.Nf3xe5

60/80- 46:25:25 4,194,100,516k 25,096k +1.75 3.Nf3xe5 Qd8-e7

60/80 46:46:07 4,225,097,404k 25,095k +1.78 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Nb8-c6 6.Nb1-c3 Bc8-e6 7.Bc1-e3 d5xe4 8.d3xe4 Qe7-d7 9.Bf1-b5 a7-a6 10.Bb5xc6 Qd7xc6 11.Nf3-d4 Qc6-d7 12.Nd4xe6 Qd7xe6 13.Qd1-h5+ g7-g6 14.Qh5-d5 Qe6xd5 15.Nc3xd5 O-O-O 16.O-O-O Rd8-e8 17.f2-f3 Re8-e6 18.Be3-d4 Bf8-d6 19.h2-h4 h7-h5 20.c2-c4 Rh8-h7 21.b2-b4 Rh7-f7 22.c4-c5 Bd6-e5 23.Bd4xe5 Re6xe5 24.Nd5-f4 Ng8-e7 25.Nf4-d3 Re5-e6 26.Kc1-c2 Ne7-c6 27.Kc2-c3 Re6-e8 28.a2-a4 f6-f5 29.Nd3-f2 f5xe4 30.Nf2xe4 Re8-e7 31.Rd1-d2 Re7-d7 32.Rh1-d1 Rd7xd2 33.Rd1xd2 Rf7-d7 34.Rd2xd7 Kc8xd7

61/86- 59:27:17 5,366,591,580k 25,073k +1.71 3.Nf3xe5 Qd8-e7

61/86+ 59:41:11 5,387,817,313k 25,075k +1.78 3.Nf3xe5

61/87+ 60:56:00 5,501,065,843k 25,078k +1.90 3.Nf3xe5

61/98 88:26:35 8,004,877,604k 25,141k +1.79 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Bc8-e6 6.Nb1-c3 Nb8-c6 7.Bc1-e3 d5xe4 8.d3xe4 Qe7-d7 9.Bf1-b5 a7-a6 10.Bb5xc6 Qd7xc6 11.Nf3-d4 Qc6-d7 12.Nd4xe6 Qd7xe6 13.Qd1-h5+ g7-g6 14.Qh5-d5 Qe6xd5 15.Nc3xd5 O-O-O 16.O-O-O Rd8-e8 17.f2-f3 Re8-e6 18.h2-h4 Bf8-h6 19.h4-h5 Bh6xe3+ 20.Nd5xe3 g6-g5 21.Rd1-d4 Ng8-e7 22.Rh1-d1 Ne7-c6 23.Rd4-d5 Re6-e7 24.b2-b3 Nc6-e5 25.Kc1-d2 Re7-d7 26.Kd2-e2 Rh8-d8 27.Rd5xd7 Ne5xd7 28.c2-c4 Rd8-e8 29.Ke2-f2 a6-a5 30.Ne3-g4 Re8-e6 31.Kf2-g3 c7-c6 32.Ng4-e3 b7-b6 33.Kg3-g4 Kc8-c7 34.h5-h6 Re6-d6 35.Kg4-f5 Rd6xd1 36.Ne3xd1 Kc7-d6 37.Nd1-f2 Kd6-e7 38.Nf2-d3

62/83+ 89:30:52 8,102,750,598k 25,144k +1.86 3.Nf3xe5

Stockfish_18080817_x64_bmi2:

56/84 12:48:05 1,152,343,267k 25,004k +1.82 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Nb8-c6 6.Nb1-c3 Bc8-e6 7.Bc1-e3 d5xe4 8.d3xe4 a7-a6 9.Nc3-d5 Qe7-d7 10.c2-c4 Bf8-b4+ 11.Nd5xb4 Qd7xd1+ 12.Ra1xd1 Nc6xb4 13.Nf3-d4 Be6-d7 14.a2-a3 Nb4-c6 15.Nd4xc6 Bd7xc6 16.f2-f3 Ng8-e7 17.Be3-f4 Ra8-c8 18.Bf1-e2 Ke8-f7 19.Bf4-g3 Rh8-e8 20.b2-b4 Bc6-a4 21.Rd1-d2 h7-h5 22.h2-h4 Ne7-g6 23.Ke1-f2 Ng6-e5 24.Kf2-e3 Rc8-d8 25.Rd2-d5 Ba4-c6 26.Rd5xd8 Re8xd8 27.b4-b5 Bc6-e8 28.a3-a4 Kf7-e7 29.b5xa6 b7xa6 30.Rh1-b1 Be8xa4 31.Rb1-a1 Ba4-b3 32.Bg3xe5 f6xe5 33.Ra1-a5 Ke7-e6 34.Ra5xa6+ Rd8-d6 35.Ra6-a7 Ke6-d7 36.c4-c5

57/76+ 13:03:16 1,175,489,147k 25,012k +1.89 3.Nf3xe5

57/76+ 14:50:34 1,337,490,139k 25,030k +1.97 3.Nf3xe5

57/78 15:38:47 1,409,756,668k 25,028k +1.86 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Nb8-c6 6.Nb1-c3 Bc8-e6 7.Bc1-e3 d5xe4 8.d3xe4 a7-a6 9.Nc3-d5 Qe7-d7 10.c2-c4 Bf8-b4+ 11.Nd5xb4 Qd7xd1+ 12.Ra1xd1 Nc6xb4 13.Nf3-d4 Be6-d7 14.a2-a3 Nb4-c6 15.Nd4xc6 Bd7xc6 16.f2-f3 Ng8-e7 17.Bf1-e2 Ne7-g6 18.b2-b4 Ng6-e5 19.h2-h3 O-O 20.Rd1-d4 Ra8-d8 21.Ke1-f2 Bc6-a4 22.Rh1-c1 Rf8-e8 23.Rd4-d5 Ba4-c6 24.Rd5-d2 Bc6-a4 25.h3-h4 Rd8xd2 26.Be3xd2 Re8-d8 27.Kf2-e3 h7-h5 28.Bd2-c3 Kg8-f7 29.Rc1-f1 Kf7-e6 30.g2-g3 Rd8-h8 31.Rf1-b1 Rh8-d8 32.Rb1-c1 g7-g6 33.Bc3-b2 Ke6-f7 34.Bb2xe5 f6xe5 35.f3-f4 Kf7-f6 36.b4-b5 a6xb5 37.c4xb5

58/82- 21:22:58 1,926,744,090k 25,030k +1.79 3.Nf3xe5 Qd8-e7

58/82+ 21:26:34 1,932,187,107k 25,030k +1.86 3.Nf3xe5

58/82 22:07:09 1,992,935,956k 25,028k +1.89 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Bc8-e6 6.Bc1-e3 Nb8-c6 7.Nb1-c3 d5xe4 8.d3xe4 a7-a6 9.Nc3-d5 Qe7-d7 10.c2-c4 Bf8-b4+ 11.Nd5xb4 Qd7xd1+ 12.Ke1xd1 Nc6xb4 13.Kd1-d2 Nb4-c6 14.Kd2-c3 Ng8-h6 15.Bf1-e2 Be6-d7 16.Nf3-d4 a6-a5 17.Nd4xc6 Bd7xc6 18.f2-f3 Nh6-f7 19.b2-b3 O-O-O 20.Be3-d4 b7-b6 21.h2-h4 Rh8-e8 22.Rh1-e1 Rd8-d7 23.Ra1-d1 h7-h5 24.Bd4-f2 Nf7-e5 25.Rd1xd7 Kc8xd7 26.a2-a4 Re8-b8 27.Bf2-d4 Kd7-e6 28.f3-f4 Ne5-g4 29.g2-g3 Ke6-f7 30.c4-c5 b6-b5 31.Be2xb5 Bc6xb5 32.a4xb5 Rb8xb5 33.Re1-a1 Kf7-e8 34.c5-c6

59/91- 22:46:49 2,052,610,985k 25,029k +1.82 3.Nf3xe5 Qd8-e7

59/91+ 23:16:30 2,097,400,175k 25,031k +1.89 3.Nf3xe5

59/91 31:02:34 2,805,146,823k 25,101k +1.90 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 d5xe4 6.d3xe4 Qe7xe4+ 7.Bf1-e2 Nb8-c6 8.Nb1-c3 Qe4-e6 9.O-O Bc8-d7 10.Bc1-f4 O-O-O 11.Nc3-b5 Nc6-e5 12.Nb5xa7+ Kc8-b8 13.Na7-b5 Bf8-c5 14.b2-b4 Bc5-b6 15.a2-a4 Ng8-e7 16.Qd1-c1 Ne7-g6 17.Nf3-d4 Bb6xd4 18.Nb5xd4 Ng6xf4 19.Qc1xf4 Qe6-d5 20.Rf1-d1 Ne5-c6 21.Nd4xc6+ Qd5xc6 22.b4-b5 Qc6-c5 23.c2-c4 Rh8-e8 24.Be2-f1 Bd7-c8 25.a4-a5 Qc5-g5 26.Qf4xg5 f6xg5 27.Rd1xd8 Re8xd8 28.Ra1-e1 g5-g4 29.f2-f3 g4xf3 30.g2xf3 g7-g6 31.Re1-e7 h7-h5 32.h2-h4 Rd8-d4 33.Re7-e4 Rd4-d8 34.Kg1-f2 Bc8-f5 35.Re4-e7 Kb8-c8 36.c4-c5 Rd8-d2+ 37.Kf2-g3 Rd2-a2 38.b5-b6 c7xb6 39.a5xb6 Ra2-c2

60/79- 37:29:07 3,393,453,058k 25,146k +1.83 3.Nf3xe5 Qd8-e7

60/79+ 39:30:27 3,575,011,313k 25,136k +1.90 3.Nf3xe5

60/80- 46:25:25 4,194,100,516k 25,096k +1.75 3.Nf3xe5 Qd8-e7

60/80 46:46:07 4,225,097,404k 25,095k +1.78 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Nb8-c6 6.Nb1-c3 Bc8-e6 7.Bc1-e3 d5xe4 8.d3xe4 Qe7-d7 9.Bf1-b5 a7-a6 10.Bb5xc6 Qd7xc6 11.Nf3-d4 Qc6-d7 12.Nd4xe6 Qd7xe6 13.Qd1-h5+ g7-g6 14.Qh5-d5 Qe6xd5 15.Nc3xd5 O-O-O 16.O-O-O Rd8-e8 17.f2-f3 Re8-e6 18.Be3-d4 Bf8-d6 19.h2-h4 h7-h5 20.c2-c4 Rh8-h7 21.b2-b4 Rh7-f7 22.c4-c5 Bd6-e5 23.Bd4xe5 Re6xe5 24.Nd5-f4 Ng8-e7 25.Nf4-d3 Re5-e6 26.Kc1-c2 Ne7-c6 27.Kc2-c3 Re6-e8 28.a2-a4 f6-f5 29.Nd3-f2 f5xe4 30.Nf2xe4 Re8-e7 31.Rd1-d2 Re7-d7 32.Rh1-d1 Rd7xd2 33.Rd1xd2 Rf7-d7 34.Rd2xd7 Kc8xd7

61/86- 59:27:17 5,366,591,580k 25,073k +1.71 3.Nf3xe5 Qd8-e7

61/86+ 59:41:11 5,387,817,313k 25,075k +1.78 3.Nf3xe5

61/87+ 60:56:00 5,501,065,843k 25,078k +1.90 3.Nf3xe5

61/98 88:26:35 8,004,877,604k 25,141k +1.79 3.Nf3xe5 Qd8-e7 4.Ne5-f3 d7-d5 5.d2-d3 Bc8-e6 6.Nb1-c3 Nb8-c6 7.Bc1-e3 d5xe4 8.d3xe4 Qe7-d7 9.Bf1-b5 a7-a6 10.Bb5xc6 Qd7xc6 11.Nf3-d4 Qc6-d7 12.Nd4xe6 Qd7xe6 13.Qd1-h5+ g7-g6 14.Qh5-d5 Qe6xd5 15.Nc3xd5 O-O-O 16.O-O-O Rd8-e8 17.f2-f3 Re8-e6 18.h2-h4 Bf8-h6 19.h4-h5 Bh6xe3+ 20.Nd5xe3 g6-g5 21.Rd1-d4 Ng8-e7 22.Rh1-d1 Ne7-c6 23.Rd4-d5 Re6-e7 24.b2-b3 Nc6-e5 25.Kc1-d2 Re7-d7 26.Kd2-e2 Rh8-d8 27.Rd5xd7 Ne5xd7 28.c2-c4 Rd8-e8 29.Ke2-f2 a6-a5 30.Ne3-g4 Re8-e6 31.Kf2-g3 c7-c6 32.Ng4-e3 b7-b6 33.Kg3-g4 Kc8-c7 34.h5-h6 Re6-d6 35.Kg4-f5 Rd6xd1 36.Ne3xd1 Kc7-d6 37.Nd1-f2 Kd6-e7 38.Nf2-d3

62/83+ 89:30:52 8,102,750,598k 25,144k +1.86 3.Nf3xe5