Shredder Classic takes 27 seconds to find the best move. Try to solve this one in your head first before testing you engine.
Nice one
Moderators: hgm, Rebel, chrisw
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Jack Lad
- Posts: 8557
- Joined: Wed Mar 08, 2006 10:01 pm
- Location: UK
Nice one
[d] rnb1qk1r/pp3ppp/2p5/3pP1B1/8/2N3Q1/PPP2PPP/R4RK1 w
Shredder Classic takes 27 seconds to find the best move. Try to solve this one in your head first before testing you engine.
Shredder Classic takes 27 seconds to find the best move. Try to solve this one in your head first before testing you engine.
Now cracks a noble heart.—Good night, sweet Princess, And flights of angels sing thee to thy rest!
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Damir
- Posts: 2801
- Joined: Mon Feb 11, 2008 3:53 pm
- Location: Denmark
- Full name: Damir Desevac
Re: Nice one
No need to use the engine, Bf6 !! is the winning move.....
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Michael Sherwin
- Posts: 3196
- Joined: Fri May 26, 2006 3:00 am
- Location: WY, USA
- Full name: Michael Sherwin
Re: Nice one
RomiChess (one core) && Glaurung 2.1 (four core) find Nc3xd5 in just over 1 second at a search depth of 14.
What I find interesting is that Fruit 2.1 finds the same move (also in just over one second) at a depth of 9!
What I find interesting is that Fruit 2.1 finds the same move (also in just over one second) at a depth of 9!
If you are on a sidewalk and the covid goes beep beep
Just step aside or you might have a bit of heat
Covid covid runs through the town all day
Can the people ever change their ways
Sherwin the covid's after you
Sherwin if it catches you you're through
Just step aside or you might have a bit of heat
Covid covid runs through the town all day
Can the people ever change their ways
Sherwin the covid's after you
Sherwin if it catches you you're through
-
michiguel
- Posts: 6401
- Joined: Thu Mar 09, 2006 8:30 pm
- Location: Chicago, Illinois, USA
Re: Nice one
An old version of Gaviota that I have here in this computer finds it a ply 8, Bf6 at ply 7. Takes longer to find it though!Michael Sherwin wrote:RomiChess (one core) && Glaurung 2.1 (four core) find Nc3xd5 in just over 1 second at a search depth of 14.
What I find interesting is that Fruit 2.1 finds the same move (also in just over one second) at a depth of 9!
I do not think there is any merit anymore at what ply an engine finds what with all the heavy pruning that many engines do.
Miguel
Code: Select all
3 1 0.0 -1.00 1.Nxd5 cxd5
6 1 0.0 +0.95 1.f4
10 1 0.0 +1.00 1.f3
14 1 0.0 +1.02 1.a4
20 1 0.0 +1.03 1.h3
66 1 0.0 +1.04 1.Qf4
80 1: 0.0 +1.04 1.Qf4
146 2 0.0 +0.79 1.Qf4 Kg8
379 2: 0.0 +0.79 1.Qf4 Kg8
613 3 0.0 +0.82 1.Qf4 Kg8 2.Bh4
2937 3: 0.0 +0.82 1.Qf4 Kg8 2.Bh4
3626 4 0.0 +0.66 1.Qf4 Kg8 2.Bh4 Be6
11984 4: 0.1 +0.66 1.Qf4 Kg8 2.Bh4 Be6
15554 5 0.1 +0.78 1.Qf4 Kg8 2.Rfe1 Na6 3.Qf3
44546 5: 0.2 +0.78 1.Qf4 Kg8 2.Rfe1 Na6 3.Qf3
63088 6 0.2 +0.64 1.Qf4 Kg8 2.a3 Nd7 3.Rfe1 Nc5
186424 6: 0.6 +0.64 1.Qf4 Kg8 2.a3 Nd7 3.Rfe1 Nc5
274236 7 0.9 +0.62 1.Qf4 h6 2.Bh4 g5 3.Qf6 Kg8 4.Bg3
917469 7 2.9 :-) 1.Bf6
937263 7 3.0 +1.81 1.Bf6 Rg8 2.Nxd5 gxf6 3.Qa3+ c5 4.Qxc5+
Kg7 5.Nxf6
943905 7: 3.0 +1.81 1.Bf6 Rg8 2.Nxd5 gxf6 3.Qa3+ c5 4.Qxc5+
Kg7 5.Nxf6
972293 8 3.1 :-) 1.Bf6
1068841 8 3.3 +2.45 1.Bf6 Rg8 2.Nxd5 gxf6 3.Qa3+ Kg7 4.Nc7
Qxe5 5.Nxa8
1573237 8 4.9 :-) 1.Nxd5
1655795 8 5.1 +3.10 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Qxh7 Qxf6 9.Qxf7 Qxf7
10.Rxf7
1661843 8: 5.1 +3.10 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Qxh7 Qxf6 9.Qxf7 Qxf7
10.Rxf7
1882353 9 5.8 +3.10 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ <=TRANS
2185510 9: 6.6 +3.10 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ <=TRANS
3071317 10 9.3 +3.34 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Qxc2
7.Qxf7+ Kc6 8.Rad1 Qxb2 9.Qxd5+ Kc7
3696518 10: 10.9 +3.34 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Qxc2
7.Qxf7+ Kc6 8.Rad1 Qxb2 9.Qxd5+ Kc7
5736664 11 17.1 +3.28 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Kc7
7.Qxf7+ Bd7 8.Qxh7 Qxf6
13289556 11: 38.1 +3.28 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Kc7
7.Qxf7+ Bd7 8.Qxh7 Qxf6
19809532 12 56.9 +3.28 1.Nxd5 cxd5 2.Bf6 g6 3.Bxh8 Kg8 4.Bf6
Nd7 5.Bg5 Qxe5 6.Qxe5 Nxe5 7.Rfe1
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Michael Sherwin
- Posts: 3196
- Joined: Fri May 26, 2006 3:00 am
- Location: WY, USA
- Full name: Michael Sherwin
Re: Nice one
Are the reductions in Fruit and Glaurung that much different? Or does Fruit have extensions that ...
If Fruit has extensions that Glaurung does not have, then can Glaurung benefit from adding those extensions to the last few plys of it's search with out loosing much depth?
This is what I meant by, "interesting".
If Fruit has extensions that Glaurung does not have, then can Glaurung benefit from adding those extensions to the last few plys of it's search with out loosing much depth?
This is what I meant by, "interesting".
If you are on a sidewalk and the covid goes beep beep
Just step aside or you might have a bit of heat
Covid covid runs through the town all day
Can the people ever change their ways
Sherwin the covid's after you
Sherwin if it catches you you're through
Just step aside or you might have a bit of heat
Covid covid runs through the town all day
Can the people ever change their ways
Sherwin the covid's after you
Sherwin if it catches you you're through
-
Eelco de Groot
- Posts: 4565
- Joined: Sun Mar 12, 2006 2:40 am
- Full name:
Re: Nice one
This type of position is one where Rebel excels at so probably the Rebel-type extensions will help here.
Good old Pro Deo 1.5, with Judith Polgar settings: 0.4 seconds on Athlon 2009MHZ, 192Mb.
Number of plies does not say very much, for instance look at the disastrous result from latest Blueberry: 5 plies and 2 minutes 22 seconds.
[D]rnb1qk1r/pp3ppp/2p5/3pP1B1/8/2N3Q1/PPP2PPP/R4RK1 w - -
Engine: Blueberry Beta 4 DM70 Build 416 (Athlon 2009 MHz, 128 MB)
by F. Letouzey, T. Gaksch, E. de Groot
1/01 0:00 +3.90 1.Rab1 (3)
1/01 0:00 +4.14 1.Rad1 (7)
1/01 0:00 +5.18 1.Rae1 (9)
2/16 0:00 +3.41 1.Rae1 Kg8 2.Bf6 Qf8 (27.406)
3/33 0:01 +3.94 1.Rae1 Bf5 2.Na4 (865.101) 607
4/37 0:02 +3.32 1.Rae1 Bf5 2.Qf4 Bxc2 3.Re2 Nd7
4.Rxc2 Qxe5 5.Qb4+ Kg8 6.Qxb7 (1.182.611) 590
5/49 0:17 +2.38 1.Rae1 Bf5 2.Qf3 Bg6 3.e6 Kg8 4.Qg4 fxe6
5.Rxe6 (10.440.176) 596
5/49 2:21 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ Nxd7
10.Qxa8 Nxf6 11.Qxa7 Qxb2 12.Qc5+ Kb8
13.Qd6+ Ka7 (79.688.596) 563
5/49 2:22 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ Nxd7
10.Qxa8 Nxf6 11.Re1 Qxb2 12.f3 Nd7
13.Qxa7 (80.454.506) 564
5/58 2:40 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ (92.753.900) 576
6/58 2:44 +3.22 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rad1 Kc7
7.Qxh7 Qxf6 8.Rxd5 Qxb2 9.Qxf7+ Bd7 (95.144.218) 577
7/58 3:52 +3.22 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rad1 Kc7
7.Qxh7 Qxf6 8.Rxd5 Qxb2 9.Qxf7+ Bd7 (133.102.056) 573
8/58 9:48 +3.58 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.c4 d4
7.Rad1 Qc5 8.Rfe1 Qxc4 9.Re7+ Kd6
10.Qd8+ Nd7 11.Rxd7+ Bxd7 12.Qxa8 (330.367.491) 561
9/58 12:35 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ Nxd7
10.Qxa8 Nxf6 11.Qxa7 Qxb2 12.Qc5+ Kb8
13.Qd6+ Ka7 (424.281.511) 561
10/58 44:55 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ Nxd7
10.Qxa8 Nxf6 11.Qxa7 Qxb2 12.Qc5+ Kb8
13.Qd6+ Ka7 (1.520.591.695) 564
11/59 106:38 +3.20 1.Nxd5 cxd5 2.Bf6 g6 3.Bxh8 Kg8
4.Bf6 Bf5 5.Rad1 Nd7 6.Rxd5 Rc8
7.Qh4 Rc6 8.Rd4 h5 9.Ra4 Nxf6
10.exf6 Rxc2 11.Rxa7 Rxb2 (3.604.622.019) 563
best move: Nc3xd5 time: 160:01.563 min n/s: 561.307 CPU 100.0% n/s(1CPU): 561.307 nodes: 5.389.340.000
But, not all is lost, I was a bit desperate after above result with build 416 but today I rewound 41 versions and got a better result with build 375. All later versions extend the PV with null window searches, but as Fruit shows "Keep It Simple Stupid" still works best here
rnb1qk1r/pp3ppp/2p5/3pP1B1/8/2N3Q1/PPP2PPP/R4RK1 w - -
Engine: Blueberry Beta 4 DM70 Build 375 (Athlon 2009 MHz, 128 MB)
by F. Letouzey, T. Gaksch, E. de Groot
1/01 0:00 +3.90 1.Rab1 (3)
1/01 0:00 +4.14 1.Rad1 (7)
1/01 0:00 +5.18 1.Rae1 (9)
2/17 0:00 +2.93 1.Rae1 h6 2.Be3 Kg8 3.Bd4 Bf5 (8.349)
3/30 0:00 +2.63 1.Rae1 Bf5 2.Qf4 Bxc2 3.Qb4+ Kg8
4.Qxb7 Nd7 5.f4 (273.680)
3/34 0:01 +3.14 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qxh7 Qxf6
7.Rad1 Kc6 (860.233) 550
3/35 0:01 +3.14 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Kc7
7.Rfe1 Qxc2 8.Qg3+ Kb6 9.Qd6+ Ka5
10.Qxd5+ Ka6 (987.197) 550
3/44 0:02 +3.14 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Nd7 8.Qg7 Qxc2 9.Qg3+ Kb6
10.Qd6+ Ka5 11.Qxd5+ Nc5 12.Rxf7 (1.748.424) 575
4/44 0:02 +2.91 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rfe1 Qxc2
7.Re7+ Kd6 8.Qd8+ Bd7 9.Rxd7+ Nxd7
10.Qxa8 (1.830.466) 621
5/44 0:05 +3.30 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Rae1+ Kd8 6.Qxh8+ Kc7
7.Re7+ Kb6 (3.252.212) 612
6/44 0:11 +3.22 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rad1 Kc7
7.Qxh7 Qxf6 8.Rxd5 Qxb2 9.Qxf7+ Bd7 (6.924.363) 622
7/46 0:37 +3.22 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rad1 Kc7
7.Qxh7 Qxf6 8.Rxd5 Qxb2 9.Qxf7+ Bd7 (23.165.913) 622
8/46 1:55 +3.34 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qd8
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Kd6
7.Qxf7 Nd7 8.Rad1 Nxf6 9.Rfe1 Kc6 (71.405.485) 618
9/46 3:16 +3.47 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Kd6
7.Qg3+ Kd7 8.Rfe1 (120.593.806) 615
best move: Nc3xd5 time: 3:26.156 min n/s: 614.810 CPU 100.0% n/s(1CPU): 614.810 nodes: 126.670.000
Eelco
Good old Pro Deo 1.5, with Judith Polgar settings: 0.4 seconds on Athlon 2009MHZ, 192Mb.
Code: Select all
00:00:00.1 -1,10 1 7 Nxd5 cxd5
00:00:00.1 -1,03 1 15 Bf6 gxf6 exf6
00:00:00.1 0,52 1 17 Rae1
00:00:00.1 0,68 1 19 Rad1
00:00:00.1 0,25 2 159 Rad1 Nd7
00:00:00.1 0,50 2 266 f4 Nd7
00:00:00.1 0,45 3 909 f4 Bf5 Rac1
00:00:00.2 0,51 3 2039 Ne2 Nd7 f4
00:00:00.2 0,41 4 4269 Ne2 Nd7 f4 c5
00:00:00.2 0,41 4 15423 e6
00:00:00.2 0,87 4 16190 e6 Qxe6 Rae1
00:00:00.2 0,87 4 17011 Bf6
00:00:00.2 1,29 4 17563 Bf6 Rg8 Nxd5 gxf6 Qxg8+ Kxg8 Nxf6+ Kf8 Nxe8 Kxe8
00:00:00.2 1,29 5 20550 Bf6 Rg8 Nxd5 gxf6 Qxg8+ Kxg8 Nxf6+ Kf8 Nxe8 Kxe8
00:00:00.2 1,29 6 34290 Bf6 Rg8 Nxd5 gxf6 Qxg8+ Kxg8 Nxf6+ Kf8 Nxe8 Kxe8
00:00:00.2 1,29 7 66483 Bf6 Rg8 Nxd5 gxf6 Qxg8+ Kxg8 Nxf6+ Kf8 Nxe8 Kxe8
00:00:00.3 1,51 8 151492 Bf6 Rg8 Nxd5 gxf6 Qxg8+ Kxg8 Nxf6+ Kf8 Nxe8 Kxe8 f4 Nd7
00:00:00.4 1,51 8 220722 Nxd5
00:00:00.5 1,91 8 327151 Nxd5 cxd5 Bf6 gxf6 exf6 Qd8 Qg7+ Ke8 Qxh8+ Kd7 Qxd8+ Kxd8 Rae1
00:00:00.7 2,05 9 601044 Nxd5 cxd5 Bf6 gxf6 exf6 Qd8 Qg7+ Ke8 Qxh8+ Kd7 Qg7 Kc7 Qxf7+ Nd7 Rae1
00:00:01.5 2,05 10 1730384 Nxd5 cxd5 Bf6 gxf6 exf6 Qd8 Qg7+ Ke8 Qxh8+ Kd7 Qg7 Kc7 Qxf7+ Nd7 Rae1
00:00:05.3 2,32 11 6646746 Nxd5 cxd5 Bf6 gxf6 exf6 Qd8 Qg7+ Ke8 Qxh8+ Kd7 Qg7 Kd6 Qxf7 Nd7 Rae1 Kc7 Qxh7 Qxf6
00:00:12.7 2,32 12 16418905 Nxd5 cxd5 Bf6 gxf6 exf6 Qd8 Qg7+ Ke8 Qxh8+ Kd7 Qg7 Kd6 Qxf7 Nd7 Rae1 Kc7 Qxh7 Qxf6
00:00:40.2 2,34 13 53220164 Nxd5 cxd5 Bf6 g6 Qe3 Kg8 Qh6 Qf8 Qxf8+ Kxf8 Bxh8 Nc6 Rfd1 Kg8[D]rnb1qk1r/pp3ppp/2p5/3pP1B1/8/2N3Q1/PPP2PPP/R4RK1 w - -
Engine: Blueberry Beta 4 DM70 Build 416 (Athlon 2009 MHz, 128 MB)
by F. Letouzey, T. Gaksch, E. de Groot
1/01 0:00 +3.90 1.Rab1 (3)
1/01 0:00 +4.14 1.Rad1 (7)
1/01 0:00 +5.18 1.Rae1 (9)
2/16 0:00 +3.41 1.Rae1 Kg8 2.Bf6 Qf8 (27.406)
3/33 0:01 +3.94 1.Rae1 Bf5 2.Na4 (865.101) 607
4/37 0:02 +3.32 1.Rae1 Bf5 2.Qf4 Bxc2 3.Re2 Nd7
4.Rxc2 Qxe5 5.Qb4+ Kg8 6.Qxb7 (1.182.611) 590
5/49 0:17 +2.38 1.Rae1 Bf5 2.Qf3 Bg6 3.e6 Kg8 4.Qg4 fxe6
5.Rxe6 (10.440.176) 596
5/49 2:21 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ Nxd7
10.Qxa8 Nxf6 11.Qxa7 Qxb2 12.Qc5+ Kb8
13.Qd6+ Ka7 (79.688.596) 563
5/49 2:22 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ Nxd7
10.Qxa8 Nxf6 11.Re1 Qxb2 12.f3 Nd7
13.Qxa7 (80.454.506) 564
5/58 2:40 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ (92.753.900) 576
6/58 2:44 +3.22 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rad1 Kc7
7.Qxh7 Qxf6 8.Rxd5 Qxb2 9.Qxf7+ Bd7 (95.144.218) 577
7/58 3:52 +3.22 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rad1 Kc7
7.Qxh7 Qxf6 8.Rxd5 Qxb2 9.Qxf7+ Bd7 (133.102.056) 573
8/58 9:48 +3.58 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.c4 d4
7.Rad1 Qc5 8.Rfe1 Qxc4 9.Re7+ Kd6
10.Qd8+ Nd7 11.Rxd7+ Bxd7 12.Qxa8 (330.367.491) 561
9/58 12:35 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ Nxd7
10.Qxa8 Nxf6 11.Qxa7 Qxb2 12.Qc5+ Kb8
13.Qd6+ Ka7 (424.281.511) 561
10/58 44:55 +3.23 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Bd7 8.Rxf7 Qxc2 9.Rxd7+ Nxd7
10.Qxa8 Nxf6 11.Qxa7 Qxb2 12.Qc5+ Kb8
13.Qd6+ Ka7 (1.520.591.695) 564
11/59 106:38 +3.20 1.Nxd5 cxd5 2.Bf6 g6 3.Bxh8 Kg8
4.Bf6 Bf5 5.Rad1 Nd7 6.Rxd5 Rc8
7.Qh4 Rc6 8.Rd4 h5 9.Ra4 Nxf6
10.exf6 Rxc2 11.Rxa7 Rxb2 (3.604.622.019) 563
best move: Nc3xd5 time: 160:01.563 min n/s: 561.307 CPU 100.0% n/s(1CPU): 561.307 nodes: 5.389.340.000
But, not all is lost, I was a bit desperate after above result with build 416 but today I rewound 41 versions and got a better result with build 375. All later versions extend the PV with null window searches, but as Fruit shows "Keep It Simple Stupid" still works best here
rnb1qk1r/pp3ppp/2p5/3pP1B1/8/2N3Q1/PPP2PPP/R4RK1 w - -
Engine: Blueberry Beta 4 DM70 Build 375 (Athlon 2009 MHz, 128 MB)
by F. Letouzey, T. Gaksch, E. de Groot
1/01 0:00 +3.90 1.Rab1 (3)
1/01 0:00 +4.14 1.Rad1 (7)
1/01 0:00 +5.18 1.Rae1 (9)
2/17 0:00 +2.93 1.Rae1 h6 2.Be3 Kg8 3.Bd4 Bf5 (8.349)
3/30 0:00 +2.63 1.Rae1 Bf5 2.Qf4 Bxc2 3.Qb4+ Kg8
4.Qxb7 Nd7 5.f4 (273.680)
3/34 0:01 +3.14 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qxh7 Qxf6
7.Rad1 Kc6 (860.233) 550
3/35 0:01 +3.14 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Kc7
7.Rfe1 Qxc2 8.Qg3+ Kb6 9.Qd6+ Ka5
10.Qxd5+ Ka6 (987.197) 550
3/44 0:02 +3.14 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rae1 Kc7
7.Re7+ Nd7 8.Qg7 Qxc2 9.Qg3+ Kb6
10.Qd6+ Ka5 11.Qxd5+ Nc5 12.Rxf7 (1.748.424) 575
4/44 0:02 +2.91 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rfe1 Qxc2
7.Re7+ Kd6 8.Qd8+ Bd7 9.Rxd7+ Nxd7
10.Qxa8 (1.830.466) 621
5/44 0:05 +3.30 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Rae1+ Kd8 6.Qxh8+ Kc7
7.Re7+ Kb6 (3.252.212) 612
6/44 0:11 +3.22 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rad1 Kc7
7.Qxh7 Qxf6 8.Rxd5 Qxb2 9.Qxf7+ Bd7 (6.924.363) 622
7/46 0:37 +3.22 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Rad1 Kc7
7.Qxh7 Qxf6 8.Rxd5 Qxb2 9.Qxf7+ Bd7 (23.165.913) 622
8/46 1:55 +3.34 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qd8
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Kd6
7.Qxf7 Nd7 8.Rad1 Nxf6 9.Rfe1 Kc6 (71.405.485) 618
9/46 3:16 +3.47 1.Nxd5 cxd5 2.Bf6 gxf6 3.exf6 Qc6
4.Qg7+ Ke8 5.Qxh8+ Kd7 6.Qg7 Kd6
7.Qg3+ Kd7 8.Rfe1 (120.593.806) 615
best move: Nc3xd5 time: 3:26.156 min n/s: 614.810 CPU 100.0% n/s(1CPU): 614.810 nodes: 126.670.000
Eelco
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
-
rightrook
- Posts: 1452
- Joined: Wed Mar 08, 2006 8:45 pm
Re: Nice one
Hi...The best move is really.....Nxd5...!!
Ruffian 1.0.5 finds Bf6 at only 8 ply...but at 14 ply...changes to
Nxd5....
regards
Robert
Ruffian 1.0.5 finds Bf6 at only 8 ply...but at 14 ply...changes to
Nxd5....
regards
Robert