Does any engine find Ne5 in this position?

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Uri Blass
Posts: 10892
Joined: Thu Mar 09, 2006 12:37 am
Location: Tel-Aviv Israel

Re: Does any engine find Ne5 in this position?

Post by Uri Blass »

I used single thread but it seems that number of threads change nothing here.

Here is analysis with 4 threads 1024 mbytes hash

FEN: 4r1k1/p5pp/4b1n1/1pp5/7b/2P2Q2/PPKBB2q/R2R4 b - - 0 1

Rybka 3 w32:
2 00:00 444 454.656 +0.24 Ng6e5
2 00:00 524 536.576 +0.49 Qh2xe2
3 00:00 621 635.904 +0.46 Qh2xe2
4+ 00:00 2.410 77.120 +0.66 Ng6e5
4 00:00 2.582 82.624 +0.58 Ng6e5
5+ 00:00 5.098 82.862 +0.78 Ng6e5
5 00:00 5.765 93.704 +0.91 Ng6e5 Qf3e4
6 00:00 6.827 88.491 +0.79 Ng6e5 Qf3e4 Be6f5
7+ 00:00 9.778 91.024 +0.99 Ng6e5
7+ 00:00 11.597 94.248 +1.19 Ng6e5
7+ 00:00 13.509 98.107 +1.59 Ng6e5
7 00:00 14.154 102.792 +1.58 Ng6e5 Qf3e4 Be6f5 Qe4xf5 Qh2xe2
8 00:01 40.838 95.475 +0.78 Ng6e5 Qf3e4 Ne5g4 Bd2f4 Be6b3+
9+ 00:01 76.131 103.944 +0.98 Ng6e5
9 00:01 117.800 105.813 +0.96 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3
10 00:01 125.926 104.580 +0.96 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3
11 00:02 181.321 105.256 +0.85 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3 Re8xe3 Ra1d1 Re3e8
11 00:05 510.494 110.939 +1.10 c5c4 Rd1f1 Qh2e5 Qf3e3 Be6f5+ Kc2d1
12 00:10 983.104 104.581 +0.90 c5c4 Rd1f1 Qh2e5 Be2d1 Re8d8 Bd1e2 Be6d5 Qf3h5 Qe5e4+ Kc2c1 Bd5c6 Qh5f3 Qe4e5 Qf3h5
13 00:11 1.091.636 107.103 +0.90 c5c4 Rd1f1 Qh2e5 Be2d1 Re8d8 Bd1e2 Be6d5 Qf3h5 Qe5e4+ Kc2c1 Bd5c6 Qh5f3 Qe4e5 Qf3h5
14 00:25 2.736.830 110.889 +1.00 c5c4 Rd1f1 Qh2e5 Kc2d1 Bh4f6 Qf3e3 Qe5c7 Be2f3 Qc7d6 Bf3e4 Be6d7 Qe3f3 Ng6e5
15 00:41 4.398.533 108.907 +1.04 c5c4 Rd1f1 Qh2e5 a2a4 b5b4 Qf3e3 b4b3+ Kc2c1 Qe5c7 Be2f3 Ng6e5 Bf3e4 Bh4f6 Qe3g1 Qc7d8 Ra1a3
16 01:16 8.277.816 111.871 +1.16 c5c4 Rd1f1 Qh2e5 Qf3h5 Be6h3 Be2f3 Qe5xh5 Bf3xh5 Bh3xf1 Ra1xf1 Re8e5 Bh5xg6 h7xg6 a2a4 a7a6 a4xb5 a6xb5 Rf1g1 Kg8f7 b2b3 c4xb3+ Kc2xb3 Bh4f6 c3c4
17 02:20 15.396.925 113.086 +1.14 c5c4 Rd1f1 Qh2e5 Qf3h5 Be6h3 Be2f3 Qe5xh5 Bf3xh5 Bh3xf1 Ra1xf1 Re8e5 Bh5xg6 h7xg6 a2a4 a7a6 a4xb5 a6xb5 b2b3 Re5e4 b3xc4 b5xc4 Rf1g1 Kg8f7 Bd2c1 Bh4f6 Rg1g2
18 06:15 42.876.446 116.999 +1.24 c5c4 Rd1f1 Qh2e5 Qf3h5 Be6h3 Be2f3 Qe5xh5 Bf3xh5 Bh3xf1 Ra1xf1 Re8e5 Bh5xg6 h7xg6 a2a4 a7a6 a4xb5 a6xb5 b2b3 c4xb3+ Kc2xb3 Bh4f6 c3c4 b5xc4+ Kb3xc4 Kg8f7 Kc4d3 Re5d5+ Kd3e2 g6g5 Bd2e3 Kf7e6


Here is analysis with 1 thread 64 mbytes

FEN: 4r1k1/p5pp/4b1n1/1pp5/7b/2P2Q2/PPKBB2q/R2R4 b - - 0 1

Rybka 3 w32:
2 00:00 186 11.203 +0.33 Ng6e5
2 00:00 215 12.950 +0.49 Qh2xe2
3 00:00 252 15.179 +0.46 Qh2xe2
4+ 00:00 2.448 31.731 +0.66 b5b4
4 00:00 2.715 35.191 +0.62 b5b4
5 00:00 8.169 35.595 +0.68 Re8f8 Qf3e3
6+ 00:00 9.805 35.603 +0.88 Ng6e5
6+ 00:00 10.362 37.626 +1.08 Ng6e5
6 00:00 11.807 36.748 +1.20 Ng6e5 Qf3e4 Be6f5 Qe4xf5
7 00:00 12.517 37.151 +1.20 Ng6e5 Qf3e4 Be6f5 Qe4xf5 Qh2xe2
8+ 00:00 19.405 39.662 +1.40 Ng6e5
8 00:00 29.180 38.259 +0.78 Ng6e5 Qf3e4 Ne5g4 Bd2f4 Be6b3+
8 00:00 35.059 38.937 +0.86 Re8f8 Qf3e3 Ng6e5 Rd1f1 Bh4f2
9 00:01 58.292 37.850 +0.75 Re8f8 Qf3e3 Ng6e5 Be2xb5 Be6f5+ Kc2c1 c5c4 Rd1f1 Bh4e7 b2b4
9+ 00:01 76.309 40.698 +1.06 Ng6e5
9+ 00:02 86.535 42.357 +1.26 Ng6e5
9 00:03 121.676 42.236 +0.83 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3 Re8xe3 Ra1d1
10 00:03 144.602 40.723 +0.83 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3 Re8xe3 Ra1d1
10+ 00:05 203.882 42.202 +1.03 c5c4
10 00:05 228.627 43.234 +1.09 c5c4 Rd1f1 Qh2e5 Qf3e3 Be6f5+ Kc2d1 Qe5xe3 Bd2xe3 Bf5h3 Kd1d2 Bh3xf1 Ra1xf1 a7a6 Be2f3
11 00:08 348.693 42.300 +1.00 c5c4 Rd1f1 Qh2e5 a2a4 b5b4 Qf3e3 b4b3+ Kc2c1 Qe5c7 Be2f3 Bh4f6
12 00:11 484.226 42.489 +1.00 c5c4 Rd1f1 Qh2e5 a2a4 b5b4 Qf3e3 b4b3+ Kc2c1 Qe5c7 Be2f3 Bh4f6
13 00:18 763.699 43.174 +1.01 c5c4 Rd1f1 Qh2e5 a2a4 b5b4 Qf3e3 b4b3+ Kc2c1 Qe5c7 Be2f3 Bh4f6 Bf3e4
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Uri
Posts: 507
Joined: Thu Dec 27, 2007 9:34 pm

Re: Does any engine find Ne5 in this position?

Post by Uri »

Uri Blass wrote:I used single thread but it seems that number of threads change nothing here.

Here is analysis with 4 threads 1024 mbytes hash

FEN: 4r1k1/p5pp/4b1n1/1pp5/7b/2P2Q2/PPKBB2q/R2R4 b - - 0 1

Rybka 3 w32:
2 00:00 444 454.656 +0.24 Ng6e5
2 00:00 524 536.576 +0.49 Qh2xe2
3 00:00 621 635.904 +0.46 Qh2xe2
4+ 00:00 2.410 77.120 +0.66 Ng6e5
4 00:00 2.582 82.624 +0.58 Ng6e5
5+ 00:00 5.098 82.862 +0.78 Ng6e5
5 00:00 5.765 93.704 +0.91 Ng6e5 Qf3e4
6 00:00 6.827 88.491 +0.79 Ng6e5 Qf3e4 Be6f5
7+ 00:00 9.778 91.024 +0.99 Ng6e5
7+ 00:00 11.597 94.248 +1.19 Ng6e5
7+ 00:00 13.509 98.107 +1.59 Ng6e5
7 00:00 14.154 102.792 +1.58 Ng6e5 Qf3e4 Be6f5 Qe4xf5 Qh2xe2
8 00:01 40.838 95.475 +0.78 Ng6e5 Qf3e4 Ne5g4 Bd2f4 Be6b3+
9+ 00:01 76.131 103.944 +0.98 Ng6e5
9 00:01 117.800 105.813 +0.96 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3
10 00:01 125.926 104.580 +0.96 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3
11 00:02 181.321 105.256 +0.85 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3 Re8xe3 Ra1d1 Re3e8
11 00:05 510.494 110.939 +1.10 c5c4 Rd1f1 Qh2e5 Qf3e3 Be6f5+ Kc2d1
12 00:10 983.104 104.581 +0.90 c5c4 Rd1f1 Qh2e5 Be2d1 Re8d8 Bd1e2 Be6d5 Qf3h5 Qe5e4+ Kc2c1 Bd5c6 Qh5f3 Qe4e5 Qf3h5
13 00:11 1.091.636 107.103 +0.90 c5c4 Rd1f1 Qh2e5 Be2d1 Re8d8 Bd1e2 Be6d5 Qf3h5 Qe5e4+ Kc2c1 Bd5c6 Qh5f3 Qe4e5 Qf3h5
14 00:25 2.736.830 110.889 +1.00 c5c4 Rd1f1 Qh2e5 Kc2d1 Bh4f6 Qf3e3 Qe5c7 Be2f3 Qc7d6 Bf3e4 Be6d7 Qe3f3 Ng6e5
15 00:41 4.398.533 108.907 +1.04 c5c4 Rd1f1 Qh2e5 a2a4 b5b4 Qf3e3 b4b3+ Kc2c1 Qe5c7 Be2f3 Ng6e5 Bf3e4 Bh4f6 Qe3g1 Qc7d8 Ra1a3
16 01:16 8.277.816 111.871 +1.16 c5c4 Rd1f1 Qh2e5 Qf3h5 Be6h3 Be2f3 Qe5xh5 Bf3xh5 Bh3xf1 Ra1xf1 Re8e5 Bh5xg6 h7xg6 a2a4 a7a6 a4xb5 a6xb5 Rf1g1 Kg8f7 b2b3 c4xb3+ Kc2xb3 Bh4f6 c3c4
17 02:20 15.396.925 113.086 +1.14 c5c4 Rd1f1 Qh2e5 Qf3h5 Be6h3 Be2f3 Qe5xh5 Bf3xh5 Bh3xf1 Ra1xf1 Re8e5 Bh5xg6 h7xg6 a2a4 a7a6 a4xb5 a6xb5 b2b3 Re5e4 b3xc4 b5xc4 Rf1g1 Kg8f7 Bd2c1 Bh4f6 Rg1g2
18 06:15 42.876.446 116.999 +1.24 c5c4 Rd1f1 Qh2e5 Qf3h5 Be6h3 Be2f3 Qe5xh5 Bf3xh5 Bh3xf1 Ra1xf1 Re8e5 Bh5xg6 h7xg6 a2a4 a7a6 a4xb5 a6xb5 b2b3 c4xb3+ Kc2xb3 Bh4f6 c3c4 b5xc4+ Kb3xc4 Kg8f7 Kc4d3 Re5d5+ Kd3e2 g6g5 Bd2e3 Kf7e6


Here is analysis with 1 thread 64 mbytes

FEN: 4r1k1/p5pp/4b1n1/1pp5/7b/2P2Q2/PPKBB2q/R2R4 b - - 0 1

Rybka 3 w32:
2 00:00 186 11.203 +0.33 Ng6e5
2 00:00 215 12.950 +0.49 Qh2xe2
3 00:00 252 15.179 +0.46 Qh2xe2
4+ 00:00 2.448 31.731 +0.66 b5b4
4 00:00 2.715 35.191 +0.62 b5b4
5 00:00 8.169 35.595 +0.68 Re8f8 Qf3e3
6+ 00:00 9.805 35.603 +0.88 Ng6e5
6+ 00:00 10.362 37.626 +1.08 Ng6e5
6 00:00 11.807 36.748 +1.20 Ng6e5 Qf3e4 Be6f5 Qe4xf5
7 00:00 12.517 37.151 +1.20 Ng6e5 Qf3e4 Be6f5 Qe4xf5 Qh2xe2
8+ 00:00 19.405 39.662 +1.40 Ng6e5
8 00:00 29.180 38.259 +0.78 Ng6e5 Qf3e4 Ne5g4 Bd2f4 Be6b3+
8 00:00 35.059 38.937 +0.86 Re8f8 Qf3e3 Ng6e5 Rd1f1 Bh4f2
9 00:01 58.292 37.850 +0.75 Re8f8 Qf3e3 Ng6e5 Be2xb5 Be6f5+ Kc2c1 c5c4 Rd1f1 Bh4e7 b2b4
9+ 00:01 76.309 40.698 +1.06 Ng6e5
9+ 00:02 86.535 42.357 +1.26 Ng6e5
9 00:03 121.676 42.236 +0.83 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3 Re8xe3 Ra1d1
10 00:03 144.602 40.723 +0.83 Ng6e5 Qf3e4 Ne5g4 Rd1h1 Be6f5 Qe4xf5 Qh2xe2 Qf5d5+ Kg8h8 Rh1h3 Ng4e3+ Rh3xe3 Re8xe3 Ra1d1
10+ 00:05 203.882 42.202 +1.03 c5c4
10 00:05 228.627 43.234 +1.09 c5c4 Rd1f1 Qh2e5 Qf3e3 Be6f5+ Kc2d1 Qe5xe3 Bd2xe3 Bf5h3 Kd1d2 Bh3xf1 Ra1xf1 a7a6 Be2f3
11 00:08 348.693 42.300 +1.00 c5c4 Rd1f1 Qh2e5 a2a4 b5b4 Qf3e3 b4b3+ Kc2c1 Qe5c7 Be2f3 Bh4f6
12 00:11 484.226 42.489 +1.00 c5c4 Rd1f1 Qh2e5 a2a4 b5b4 Qf3e3 b4b3+ Kc2c1 Qe5c7 Be2f3 Bh4f6
13 00:18 763.699 43.174 +1.01 c5c4 Rd1f1 Qh2e5 a2a4 b5b4 Qf3e3 b4b3+ Kc2c1 Qe5c7 Be2f3 Bh4f6 Bf3e4
Yes I got the same result. It starts with Ne5 but then suddenly switches to c4.
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swami
Posts: 6662
Joined: Thu Mar 09, 2006 4:21 am

Re: Does any engine find Ne5 in this position?

Post by swami »

Bright 0.4a finds it instantly. Q6600 2.4 GHZ

Analysis by bright-0.4a:

Code: Select all

1...Ne5 
  -/+  (-0.79)   Depth: 1/3   00:00:00
1...Ne5 2.Qf1 
  -/+  (-0.76)   Depth: 2/8   00:00:00
1...Ne5 2.Qh5 Bf7 
  -/+  (-0.73)   Depth: 3/13   00:00:00
1...Ne5 2.Qh5 Bf7 3.Rh1 
  =/+  (-0.63)   Depth: 4/14   00:00:00
1...Ne5 2.Qh5 Bf7 3.Rh1 Qxh1 4.Rxh1 Bxh5 5.Bxh5 
  -/+  (-1.13)   Depth: 5/16   00:00:00
1...Ne5 2.Qh5 Bf7 3.Rh1 Qxh1 4.Rxh1 Bxh5 5.Bxh5 
  -/+  (-1.13)   Depth: 6/16   00:00:00  33kN
1...Ne5 2.Qh5 g6 3.Rh1 Bf5+ 4.Kb3 c4+ 5.Ka3 Qxh1 6.Rxh1 Be7+ 7.b4 gxh5 8.Bxh5 
  -+  (-3.64)   Depth: 7/24   00:00:00  89kN
1...Ne5 2.Qh5 Bf7 3.Rh1 Qg2 4.Qxh4 Qxe2+ 5.Bd2 Bg6+ 6.Kc1 Nd3+ 7.Kc2 Nf2+ 8.Kc1 Nxh1 9.Qxh1 
  -+  (-4.15)   Depth: 8/27   00:00:00  175kN
1...Ne5 2.Qh5 Bf7 3.Rh1 Qg2 4.Qxh4 Qxe2+ 5.Bd2 Bg6+ 6.Kc1 Nd3+ 7.Kc2 Nf2+ 8.Kc1 Nxh1 9.Qxh1 
  -+  (-4.15)   Depth: 9/27   00:00:00  339kN
1...Ne5 2.Qf1 Bh3 3.Bf4 Bxf1 4.Bxh2 Bxe2 5.Rd5 Nf3 6.Bf4 
  -+  (-4.01)   Depth: 10/34   00:00:00  1677kN
1...Ne5 2.Qf1 Rf8 3.Rd2 Rxf1 4.Rxf1 Qg2 5.Bxc5 Qe4+ 6.Kc1 Bf5 7.Rxf5 Qxf5 
  -+  (-4.59)   Depth: 11/37   00:00:01  3736kN
1...Ne5 2.Qf1 Bh3 3.Bf4 Bxf1 4.Bxh2 Bxe2 5.Rd5 Nf3 6.Bf4 Bc4 7.Rxc5 Re2+ 8.Kc1 
  -+  (-4.76)   Depth: 12/40   00:00:02  7879kN
1...Ne5 2.Qf1 Bh3 3.Bf4 Bxf1 4.Bxh2 Bxe2 5.Rh1 Bd3+ 6.Kb3 Bc4+ 7.Ka3 Re6 8.b3 Ra6+ 9.Kb2 
  -+  (-4.84)   Depth: 13/42   00:00:03  15209kN
1...Ne5 2.Qf1 Bh3 3.Bf4 Bxf1 4.Bxh2 Bxe2 5.Rh1 Bd3+ 6.Kb3 Nf3 7.Rad1 Re2 8.Ka3 b4+ 9.cxb4 cxb4+ 10.Kb3 
  -+  (-5.03)   Depth: 14/53   00:00:07  30643kN
1...Ne5 2.Rh1 Nxf3 3.Rxh2 Bf5+ 4.Kd1 Nxh2 5.Bxc5 Rd8+ 6.Bd4 Bf2 7.Kd2 b4 8.Rh1 Bxd4 9.cxd4 Rxd4+ 10.Ke3 Re4+ 11.Kd3 
  -+  (-5.66)   Depth: 15/53   00:00:33  125mN
1...Ne5 2.Rh1 Nxf3 3.Rxh2 Bf5+ 4.Kd1 Nxh2 5.Bxc5 Rd8+ 6.Bd4 Bf2 7.Kd2 b4 8.Rh1 bxc3+ 9.bxc3 Bxd4 10.cxd4 Rxd4+ 11.Kc3 
  -+  (-5.65)   Depth: 16/53   00:00:42  162mN
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