Very difficult Test position: 1.Qf4!!

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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Rybka 5 hour test position with Quad

Post by kgburcham »

[D] r4r1k/ppq4p/2n1bppP/2P1p3/2B2n2/1N3Q2/PBP2PP1/3RR1K1 w - -

Rybka 2.3.2a mp x64
Quad 4x2.4 mhz
Hash 2048

24.01 142:36 +0.21 1.Bxe6 Nxe6 2.Rd6 Rae8 3.a4 Qf7 4.g3 Kg8 5.Kg2 Ng5 6.Qg4 Rd8 7.Red1 Rxd6 (4.188.119.492) 501
24.13 226:13 +0.34 1.Nd2 Rad8 2.Bb3 Bxb3 3.axb3 Ne6 4.Ne4 Ncd4 5.Bxd4 Nxd4 6.Qd3 Nf5 7.Qb5 Nxh6 (5.728.329.216) 432
25.01 271:09 +0.33 1.Nd2 Rad8 2.Bb3 Bxb3 3.axb3 Ne6 4.Ne4 Ncd4 5.Bxd4 Nxd4 6.Qd3 Nf5 7.Qb5 Nxh6 (6.575.544.467) 413
25.03 298:52 +2.45 1.Qxf4 exf4 2.Rxe6 Ne5 3.Rxe5 fxe5 4.Rd7 Qb8 5.Nd2 Rf5 6.Nf3 b5 7.Bd5 Qe8 (7.129.203.271) 407
25.01 321:35 +2.54 1.Qxf4 exf4 2.Rxe6 Ne5 3.Rxe5 fxe5 4.Rd7 Qb8 5.Nd2 Rf5 6.Nf3 Qe8 7.Rd5 Rd8 (7.666.326.659) 406
26.01 325:54 +2.54 1.Qxf4 exf4 2.Rxe6 Ne5 3.Rxe5 fxe5 4.Rd7 Qb8 5.Nd2 Rf5 6.Nf3 Qe8 7.Rd5 Rd8 (7.740.947.954) 405
27.01 354:27 +2.55 1.Qxf4 exf4 2.Rxe6 Ne5 3.Rxe5 fxe5 4.Rd7 Qb8 5.Nd2 Rf5 6.Nf3 Qe8 7.Rd5 Rd8 (8.285.898.145) 398
28.01 413:44 +2.69 1.Qxf4 exf4 2.Rxe6 Ne5 3.Rxe5 fxe5 4.Rd7 Qb8 5.Nd2 Rf5 6.Nf3 Qe8 7.Rd5 Rd8 (9.460.949.759) 390
best move: Qf3xf4 time: 487:25.234 min n/s: 382.505 nodes: 10.924.117.196
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BBauer
Posts: 658
Joined: Wed Mar 08, 2006 8:58 pm

Re: Rybka 5 hour test position with Quad

Post by BBauer »

I gave glaurung2.1 a try.

Code: Select all

Glaurung2.1 mp x64
Xeon 4x3.0 Mhz 4Gb hash
15  -96   1718    84002085 Bb5 Rad8 Bc1 Bd5 Qc3 Ne6 Qg3 Bxb3 axb3 Rxd1 Rxd1 Ncd4 Bc4 Qxc5 Qg4
15  -78   2146   105582363 Bxe6 Nxe6 Rd6 Rae8 Red1 Kg8 Qg4 Qf7 Bc3 Rd8 Qh4 Qc7 Qc4 Qe7 R1d3 Rfe8
16  -66   3875   192196703 Bxe6 Nxe6 Rd6 Rae8 Bc3 Re7 Red1 Kg8 Qd5 Qc8 Qc4 Rff7 Nd2 Nf4 Ne4 Re6 Qb5
17  -76   6061   304213033 Bxe6 Nxe6 Rd6 Rae8 Red1 Qf7 Qd5 Kg8 Nd2 Ned4 c4 Ne6 Ne4 f5 Rd7 Re7 Rxe7 Qxe7
18  -66  11383   578831871 Bxe6 Nxe6 Rd6 Rae8 Qg4 Re7 Red1 Rfe8 Bc3 Qc8 Nd2 Nf4 Qxc8 Rxc8 Re1 Ne6 Nc4 Kg8
19  -70  26718  1382948179 Bxe6 Nxe6 Rd6 Rae8 Red1 Qc8 Qg4 Kg8 Bc3 Re7 Nd2 Ned4 Qxc8 Rxc8 Bxd4 Nxd4 Ne4 f5
20  -72  50036  2605421851 Bxe6 Nxe6 Rd6 Rae8 Red1 Kg8 a4 Qf7 a5 a6 Qe4 Re7 Bc3 Nf4 Bd2 f5 Qf3 Ne6 Bc3 Rc8
20  -39 115371  6017949194 Nd2 Rad8 Bb3 Bd5 Ne4 Qa5 Bc3 Bxe4 Rxd8 Qxd8 Qxe4 Qd7 Ba4 Nd5 Qd3 Rd8 Ba5 Rc8 Rd1
21  -33 268332 13929758146 Nd2 Bxc4 Nxc4 Rad8 Rxd8 Qxd8 Bc1 Ne6 Nd6 Ned4 Qd5 Qd7 Bd2 Nxc2 Rb1 Nd8 Qe4 Nd4
22  -35 409844 21343304333 Nd2 Bxc4 Nxc4 Rad8 Rxd8 Qxd8 Bc1 Ne6 Nd6 Qd7 Be3 b6 Qd5 bxc5 Bxc5 Rd8 Qc4 Na5 Qd5
22 +109 550265 29004314403 Qxf4 exf4 Rxe6 Ne5 Rxe5 fxe5 Rd7 Qb8 Nc1 b5 Nd3 bxc4 Bxe5+ Qxe5 Nxe5 Rf5 Re7 Rb8 Kf1
23 +217 606191 32198552109 Qxf4 exf4 Rxe6 Ne5 Rxe5 fxe5 Rd7 Qb8 Nc1 b6 Nd3 Rf5 Rf7 Rh5 Rf8+ Qxf8 Nxe5 Qf6 Nf7+ 
24 +250 767905 41449793629 Qxf4 exf4 Rxe6 Ne5 Rxe5 fxe5 Rd7 Qb8 Nc1 b6 Nd3 Rf5 Rf7 bxc5 Rxf5 Qxb2 Nxb2 gxf5 Nd3
So Glaurung is somewhat faster than Rybka at this position.
Bernhard
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swissman
Posts: 29
Joined: Thu Mar 12, 2020 2:06 pm
Full name: Kurt Utzinger

Re: Very difficult Test position: 1.Qf4!!

Post by swissman »

jarechu wrote: ↑Thu May 29, 2008 3:12 pm Is any engine able to find this:

[Event "Active"]
[Site "Barcelona (Spain)"]
[Round ""]
[White "Rahal Michael (ENG)"]
[Black "Cuartas Jaime Alexander (COL)"]
[Result ""]
[Eco ""]
[Annotator ""]
[Source ""]
[SetUp "1"]
[FEN "r4r1k/ppq4p/2n1bppP/2P1p3/2B2n2/1N3Q2/PBP2PP1/3RR1K1 w - - 0 1"]

1.Qxf4 exf4 2.Rxe6 Ne5 3.Rxe5 fxe5 4.Rd7 Qb8 5.Nd4 Qe8 6.Nf3
Rf5 7.Rd5 Rd8 8.Rxe5 Rxe5 9.Bxe5+ Qxe5 10.Nxe5 *
Do you have the complete game? That would be fine.
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Jouni
Posts: 3292
Joined: Wed Mar 08, 2006 8:15 pm

Re: Very difficult Test position: 1.Qf4!!

Post by Jouni »

Hard position 2008 :D . Crystal took whole 2 seconds: Also quad.

Analysis by Crystal 110920:

...
1.Bxe6 Nxe6 2.Rd6 Rae8 3.Bc3 Re7 4.Red1 Qc8 5.Qg4 Nf4 6.Qxc8 Rxc8 7.Be1 Ne6 8.Rd7 Kg8 9.Rxe7 Nxe7 10.Rd7 Rc7 11.Rxc7
= (0.30) Depth: 16/28 00:00:00 2141kN
1.Qxf4 exf4 2.Rxe6 Ne5 3.Rxe5 fxe5 4.Rd7 Qb8 5.Na5 Rf5 6.Nxb7 Qf8 7.Nd6 Rb8 8.Bb3 Rxb3 9.axb3 Qxh6 10.Nxf5 gxf5 11.Bxe5+ Kg8 12.Rd6 Qg5
+/- (1.57) Depth: 17/35 00:00:02 12834kN
1.Qxf4 exf4 2.Rxe6 Ne5 3.Rxe5 fxe5 4.Rd7 Qb8 5.Na5 Qe8 6.Nxb7 Rf6 7.c6 Rxc6 8.Bf7 Rxc2 9.Nd6 Rxb2 10.Bxe8 Rxe8 11.Nxe8 Rxa2 12.Nd6 Ra1+ 13.Kh2
+- (3.56) Depth: 18/35 00:00:03 17371kN
1.Qxf4
+- (3.60 ++) Depth: 19/35 00:00:03 20204kN
1.Qxf4
+- (3.64 ++) Depth: 19/35 00:00:04 23139kN
1.Qxf4
+- (3.71 ++) Depth: 19/35 00:00:04 24338kN
1.Qxf4
+- (3.79 ++) Depth: 19/41 00:00:05 28859kN
1.Qxf4
+- (3.92 ++) Depth: 19/41 00:00:05 31441kN
1.Qxf4 b5 2.cxb6 axb6 3.Qe4 Bf5 4.Qe2 Rxa2 5.Rb1 b5 6.Bxb5 Nb4 7.Nd2 Nxc2 8.Rec1 Qb8 9.g4 Rxb2 10.Rxb2 Nd4 11.Qd1 Be6 12.Rcb1 Qc8 13.Be2 Nxe2+ 14.Qxe2 Bxg4
+- (3.75) Depth: 19/41 00:00:05 32017kN
1.Qxf4
+- (3.99 ++) Depth: 20/28 00:00:05 33209kN
1.Qxf4
+- (4.03 ++) Depth: 20/29 00:00:06 33599kN
1.Qxf4
+- (4.10 ++) Depth: 20/29 00:00:06 34462kN
1.Qxf4
+- (4.18 ++) Depth: 20/29 00:00:07 40742kN
1.Qxf4 b5 2.cxb6 axb6 3.Qe4 Bf5 4.Qe2 Rxa2 5.Rb1 Rb8 6.Qf3 Rf8 7.Nd2 Ra4 8.Qb3 Rb4 9.Qc3 Rd8 10.Ne4 b5 11.Bd3 Ra4 12.Nxf6 Bxd3 13.cxd3 b4
+- (4.22) Depth: 20/40 00:00:10 56627kN
1.Qxf4 b5
+- (4.44 --) Depth: 21/30 00:00:10 57531kN
1.Qxf4 b5
+- (4.39 --) Depth: 21/30 00:00:10 57536kN
1.Qxf4
+- (4.44 ++) Depth: 21/30 00:00:10 58416kN
1.Qxf4
+- (4.53 ++) Depth: 21/36 00:00:11 64510kN
1.Qxf4 b5 2.cxb6 axb6 3.Qe4 Bf5 4.Qe2 Rxa2 5.Rb1 Raa8 6.g4 Bc8 7.Nd2 Bb7 8.g5 Qd7 9.Ne4 Nd4 10.Bxd4 Qxd4 11.Qd3 Qxd3 12.cxd3 Bxe4 13.Rxe4 fxg5 14.Rxb6 Rf3 15.Kg2 Raf8 16.Rb2 R3f4 17.Rxf4 gxf4
+- (4.46) Depth: 21/36 00:00:11 65952kN
1.Qxf4
+- (4.47 ++) Depth: 22/37 00:00:12 71411kN
1.Qxf4
+- (4.51 ++) Depth: 22/37 00:00:14 79257kN, tb=55
Jouni
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