[d] 5q2/1p1kp3/pP4p1/4B3/3N3K/1B6/P4P2/8 w - - 0 1
White to play and win.
Endgame test position
Moderator: Ras
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Jack Lad
- Posts: 8557
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- Location: UK
Endgame test position
Now cracks a noble heart.—Good night, sweet Princess, And flights of angels sing thee to thy rest!
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GARGAMEL
- Posts: 111
- Joined: Tue Dec 29, 2009 9:55 am
- Location: AUSTRIA
Re: Endgame test position
hello
Analysis by Deep Fritz 10
1.Le6+ Ke8 2.Kg3 Dh6 3.f4 g5 4.f5 Dh4+ 5.Kf3 g4+ 6.Kf4 De1
+/= (0.30) Tiefe: 9/21 00:00:00 162kN
1.Kg3 Dh6 2.La4+ Kc8 3.Sf3 e6 4.Lc7 Dc1 5.Kg2 Db1 6.Lb3 De4 7.Kg3 Df5 8.Sd4 Dd3+ 9.f3 Kd7 10.Sxe6
+/= (0.30) Tiefe: 9/21 00:00:00 205kN
+/= (0.51) Tiefe: 25/97 00:40:31 34995mN, tb=3607
1.Le6!!+ Ke8 2.Sf5 gxf5 3.Kh5 a5 4.Kg6 Kd8 5.Kh7 Ke8 6.f4 Kd8 7.a4 Ke8 8.Lg7 Df7 9.Lxf7+ Kxf7 10.Kh6 e6
+/= (0.52) Tiefe: 25/97 00:47:01 40674mN, tb=9434
+- (4.23) Tiefe: 25/97 00:48:12 41654mN, tb=10244
regards Anton
Analysis by Deep Fritz 10
1.Le6+ Ke8 2.Kg3 Dh6 3.f4 g5 4.f5 Dh4+ 5.Kf3 g4+ 6.Kf4 De1
+/= (0.30) Tiefe: 9/21 00:00:00 162kN
1.Kg3 Dh6 2.La4+ Kc8 3.Sf3 e6 4.Lc7 Dc1 5.Kg2 Db1 6.Lb3 De4 7.Kg3 Df5 8.Sd4 Dd3+ 9.f3 Kd7 10.Sxe6
+/= (0.30) Tiefe: 9/21 00:00:00 205kN
+/= (0.51) Tiefe: 25/97 00:40:31 34995mN, tb=3607
1.Le6!!+ Ke8 2.Sf5 gxf5 3.Kh5 a5 4.Kg6 Kd8 5.Kh7 Ke8 6.f4 Kd8 7.a4 Ke8 8.Lg7 Df7 9.Lxf7+ Kxf7 10.Kh6 e6
+/= (0.52) Tiefe: 25/97 00:47:01 40674mN, tb=9434
+- (4.23) Tiefe: 25/97 00:48:12 41654mN, tb=10244
regards Anton
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ZirconiumX
- Posts: 1366
- Joined: Sun Jul 17, 2011 11:14 am
- Full name: Hannah Ravensloft
Re: Endgame test position
FruitFly One Second Wonder(tm)
Score : +1.77
Depth : 8/1
Time : 00:00:00
Nodes : 66505
N/sec : 159612
1. Be6
Note the extremely long PV.
Matthew:out
Score : +1.77
Depth : 8/1
Time : 00:00:00
Nodes : 66505
N/sec : 159612
1. Be6
Note the extremely long PV.
Matthew:out
tu ne cede malis, sed contra audentior ito
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kgburcham
- Posts: 2016
- Joined: Sun Feb 17, 2008 4:19 pm
Re: Endgame test position
[d] 5q2/1p1kp3/pP4p1/4B3/3N3K/1B6/P4P2/8 w - - 0 1
good test position.i had to work on this one.
Houdini 2.0c Pro x64:
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Bc7+ Ke8 5.Be5 Kd8
= (0.00) Depth: 34/66 00:01:15 2601mN, tb=105
1.Be6+
= (0.04 ++) Depth: 35/66 00:02:26 5205mN, tb=184
1.Be6+
= (0.14 ++) Depth: 35/66 00:03:02 6512mN, tb=228
1.Be6+
+/= (0.36 ++) Depth: 35/66 00:04:08 8905mN, tb=253
1.Be6+
+/- (1.16 ++) Depth: 35/80 00:04:36 9869mN, tb=676
1.Be6+
+- (4.19 ++) Depth: 35/80 00:04:53 10307mN, tb=2143
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 Ke8
+- (10.75) Depth: 35/82 00:06:58 14383mN, tb=27372
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 Ke8
+- (10.75) Depth: 36/82 00:07:32 15583mN, tb=29483
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 Ke8
+- (10.80) Depth: 37/84 00:09:03 18611mN, tb=43726
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 Ke8
+- (10.89) Depth: 38/85 00:11:15 23270mN, tb=59484
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 f4 5.f3 Ke8 6.Kg6 Kd8 7.Kh7 Ke8 8.Bg7 Qf7 9.Bxf7+ Kxf7
+- (10.90) Depth: 39/85 00:13:47 28792mN, tb=73726
1.Be6+
+- (11.35 ++) Depth: 40/98 00:18:14 38618mN, tb=103635
good test position.i had to work on this one.
Houdini 2.0c Pro x64:
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Bc7+ Ke8 5.Be5 Kd8
= (0.00) Depth: 34/66 00:01:15 2601mN, tb=105
1.Be6+
= (0.04 ++) Depth: 35/66 00:02:26 5205mN, tb=184
1.Be6+
= (0.14 ++) Depth: 35/66 00:03:02 6512mN, tb=228
1.Be6+
+/= (0.36 ++) Depth: 35/66 00:04:08 8905mN, tb=253
1.Be6+
+/- (1.16 ++) Depth: 35/80 00:04:36 9869mN, tb=676
1.Be6+
+- (4.19 ++) Depth: 35/80 00:04:53 10307mN, tb=2143
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 Ke8
+- (10.75) Depth: 35/82 00:06:58 14383mN, tb=27372
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 Ke8
+- (10.75) Depth: 36/82 00:07:32 15583mN, tb=29483
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 Ke8
+- (10.80) Depth: 37/84 00:09:03 18611mN, tb=43726
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 Ke8
+- (10.89) Depth: 38/85 00:11:15 23270mN, tb=59484
1.Be6+ Ke8 2.Nf5 gxf5 3.Kh5 Kd8 4.Kg5 f4 5.f3 Ke8 6.Kg6 Kd8 7.Kh7 Ke8 8.Bg7 Qf7 9.Bxf7+ Kxf7
+- (10.90) Depth: 39/85 00:13:47 28792mN, tb=73726
1.Be6+
+- (11.35 ++) Depth: 40/98 00:18:14 38618mN, tb=103635
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Jack Lad
- Posts: 8557
- Joined: Wed Mar 08, 2006 10:01 pm
- Location: UK
Endgame test position 2
[d] b7/5k2/pr2p1pr/Pp1pPpPp/1PpP1P1P/2P5/8/B3K3 w - - 0 1
White to play and draw.
White to play and draw.
Now cracks a noble heart.—Good night, sweet Princess, And flights of angels sing thee to thy rest!
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Jack Lad
- Posts: 8557
- Joined: Wed Mar 08, 2006 10:01 pm
- Location: UK
Endgame test position 3
[d] RBRKQRBn/PpPPPPpP/8/8/8/8/8/5B1k w - - 0 1
White to play and draw.
White to play and draw.
Now cracks a noble heart.—Good night, sweet Princess, And flights of angels sing thee to thy rest!
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Jack Lad
- Posts: 8557
- Joined: Wed Mar 08, 2006 10:01 pm
- Location: UK
Endgame test position 4
[d] BNRRN2b/5Kpr/5np1/6pr/6pq/6pk/6p1/6Bb w - - 3 3
White to play and win.
White to play and win.
Now cracks a noble heart.—Good night, sweet Princess, And flights of angels sing thee to thy rest!
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Steve Maughan
- Posts: 1333
- Joined: Wed Mar 08, 2006 8:28 pm
- Location: Florida, USA
Re: Endgame test position
WOW - an amazing position! It's really quite deep. The forced win of the Queen is 19 ply. Most of those moves would be regarded as quiet and most forms of selectivity would prune, or aggressively reduce.
From a engine / programming perspective I think the key position is after the following moves:
1. Be6+ Ke8 2. Nf5 gxf5 3. Kg5 f4 4. f3 Kd8
[d]3k1q2/1p2p3/pP2B3/4B1K1/5p2/5P2/P7/8 w - - 0 5
White is a knight down compared to the root position. It isn't zugzwang as black can play a5 with no immediate repercussions. The queen has some safe squares to move to as it looks as if she can move to e8 (although it's mate in 1).So aggressive pruning is likely. I think this is difficult for engines to see past this position from the root.
Thanks for sharing,
Steve
From a engine / programming perspective I think the key position is after the following moves:
1. Be6+ Ke8 2. Nf5 gxf5 3. Kg5 f4 4. f3 Kd8
[d]3k1q2/1p2p3/pP2B3/4B1K1/5p2/5P2/P7/8 w - - 0 5
White is a knight down compared to the root position. It isn't zugzwang as black can play a5 with no immediate repercussions. The queen has some safe squares to move to as it looks as if she can move to e8 (although it's mate in 1).So aggressive pruning is likely. I think this is difficult for engines to see past this position from the root.
Thanks for sharing,
Steve
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zullil
- Posts: 6442
- Joined: Tue Jan 09, 2007 12:31 am
- Location: PA USA
- Full name: Louis Zulli
Re: Endgame test position 2
I bet Critter-1.5 will evaluate this one correctly. Richard, care to show us?Jack Lad wrote:[d] b7/5k2/pr2p1pr/Pp1pPpPp/1PpP1P1P/2P5/8/B3K3 w - - 0 1
White to play and draw.
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kgburcham
- Posts: 2016
- Joined: Sun Feb 17, 2008 4:19 pm
Re: Endgame test position 2
Deep ShredderJack Lad wrote:[d] b7/5k2/pr2p1pr/Pp1pPpPp/1PpP1P1P/2P5/8/B3K3 w - - 0 1
White to play and draw.
32/43 0:01 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (17.797.885) 12265
33/44 0:02 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (25.098.692) 12376
34/45 0:02 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (36.554.421) 12463
35/44 0:04 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (60.943.544) 12723
36/48 0:07 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (94.514.866) 12753
37/49 0:10 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (136.391.453) 12838
38/51 0:16 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (216.624.451) 12952
39/53 0:26 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (340.436.944) 13005
40/53 0:43 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (570.408.903) 13095
41/41 1:18 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (1.031.575.015) 13188
42/57 2:19 -0.18 1.Bb2 Rh7 2.Kf2 Rb8 3.Bc1 Ke7 4.Ke2 Rc8 5.Be3 Bc6 6.Kd2 Rhh8 7.Ke2 Ba8 (1.828.464.668) 13111