Test position: Very tough and just tough

Discussion of anything and everything relating to chess playing software and machines.

Moderator: Ras

Albert Silver
Posts: 3026
Joined: Wed Mar 08, 2006 9:57 pm
Location: Rio de Janeiro, Brazil

Test position: Very tough and just tough

Post by Albert Silver »

While analyzing the game between Vallejo Pons and Korobov, white had the option of trying to lock the position up with 16...g5?

[d]r2q1rk1/p1nbppb1/3p3p/1ppP1Ppn/4P2B/2P2N2/PPBQ2PP/R2N1RK1 w - - 0 16

This meets the classic 17.Bxg5! followed by hxg5 18.Qxg5 Nf6 19.Ne3 and if 19...c4

[d]r2q1rk1/p1nbppb1/3p1n2/1p1P1PQ1/2p1P3/2P1NN2/PPB3PP/R4RK1 w - - 0 19

White follows up with 20.Qh4! (followed by g4-g5 etc.) This last move is tough enough as it is, so before trying 17.Bxg5!, see how long it takes to find 20.Qh4.
"Tactics are the bricks and sticks that make up a game, but positional play is the architectural blueprint."
Top
User avatar
AdminX
Posts: 6390
Joined: Mon Mar 13, 2006 2:34 pm
Location: Acworth, GA

Re: Test position: Very tough and just tough

Post by AdminX »

[d]r2q1rk1/p1nbppb1/3p1n2/1p1P1PQ1/2p1P3/2P1NN2/PPB3PP/R4RK1 w - - 0 19

Komodo spots it.

[-0.02] d=21 19.Qh4 (0:04:21) 286973kN
[-0.27] d=21 19.g4 Nh7 20.Qh4 f6 21.a4 a6 22.Nd4 Qb8 23.Qg3 Qb6 24.h4 Qc5 25.Qf2 Bh6 26.Qe2 Rfd8 27.Rad1 Bg7 28.Qg2 bxa4 29.g5 a3 30.bxa3 Rab8 (0:02:32) 170610kN
[-0.26] d=20 19.g4 Nh7 20.Qh4 f6 21.a4 a6 22.Nd4 Qb8 23.Qg3 Qb6 24.h4 Qc5 25.Qf2 Bh6 26.Qe2 Rfd8 27.Rad1 Bg7 28.Rf3 Kf8 29.a5 Rac8 (0:02:16) 153139kN
[-0.46] d=20 19.Qh4 b4 20.cxb4 Qb8 21.Nd2 Qxb4 22.Ndxc4 a5 23.Rad1 Bb5 24.Bd3 Rfc8 25.Kh1 Kf8 26.Rc1 Qc5 27.Rf3 Qd4 28.Nc2 Qa7 29.N2e3 Qc5 30.Rg3 Qd4 31.Rxg7 Kxg7 (0:01:22) 93252kN
[-0.40] d=19 19.Qh4 b4 20.cxb4 Qb8 21.Nd2 Qxb4 22.Ndxc4 a5 23.Rae1 Bb5 24.b3 Rac8 25.g4 Bxc4 26.bxc4 Nh7 27.Re2 Bd4 28.Bd3 Qc5 29.Qh6 Bg7 30.Qh4 Qd4 31.Bc2 (0:00:51) 58723kN
[-0.37] d=18 19.Qh4 Nh7 20.Ng4 e5 21.dxe6 Qxh4 22.exf7 Rxf7 23.Nxh4 Nf6 24.Nf2 Re8 25.Ng6 Bc6 26.a4 Nxe4 27.axb5 Nxb5 28.Nxe4 Bxe4 29.Bxe4 Rxe4 30.Ra5 Nxc3 31.bxc3 Bxc3 32.Rd5 Bd4 33.Kh1 Rf6 34.Rd1 Be3 (0:00:15) 17020kN
[-0.42] d=17 19.Qh4 Nh7 20.Ng4 Ne8 21.Nh6 Bxh6 22.Qxh6 Qb6 23.Kh1 Nef6 24.Qh4 a5 25.Rad1 Qc5 26.Rd4 Rad8 27.Kg1 Kh8 28.Ng5 Rde8 (0:00:08) 9720kN
[-0.32] d=16 19.Qh4 Nh7 20.a4 a6 21.Ng4 e5 22.dxe6 fxe6 23.Qg3 exf5 24.Nh6 Kh8 25.Nxf5 Bxf5 26.exf5 Nd5 27.Be4 Qb6 28.Rf2 Nhf6 29.Bxd5 Nxd5 30.Rd1 Qc5 31.Qg5 bxa4 (0:00:04) 5402kN
[-0.32] d=15 19.Qh4 Nh7 20.a4 a6 21.Ng4 e5 22.dxe6 fxe6 23.Qg3 exf5 24.Nh6 Kh8 25.Nxf5 Bxf5 26.exf5 Nd5 27.Be4 Qb6 28.Rf2 Nhf6 29.Bxd5 Nxd5 30.Rd1 Qc5 31.Qg5 bxa4 (0:00:04) 4761kN
[-0.28] d=14 19.Qh4 Qb8 20.g4 Qb6 21.Rae1 Nh7 22.g5 a5 23.Kh1 Rab8 24.a4 Qc5 25.axb5 Qxb5 26.g6 Nf6 27.e5 (0:00:01) 1558kN
[-0.27] d=13 19.Qh4 Qb8 20.g4 Qb6 21.Rae1 Nh7 22.g5 Rae8 23.g6 Nf6 24.Kh1 Qa6 25.a3 Qb6 (0:00:01) 1337kN
[-0.37] d=12 19.Qh4 Qb8 20.g4 Qb6 21.Rae1 Nh7 22.g5 Rae8 23.g6 Nf6 24.Kh1 Qa5 25.a4 (0:00:00) 239kN
[-0.30] d=11 19.Qh4 Qb8 20.g4 Qb6 21.Rae1 Nh7 22.g5 Rae8 23.g6 Nf6 24.Kh1 a5 (0:00:00) 225kN
[-0.42] d=10 19.Qh4 Qb8 20.g4 Qb6 21.Rae1 Nh7 22.g5 Rae8 23.g6 Nf6 24.Kh1 (0:00:00) 210kN
[-0.52] d=10 19.Nd4 Qc8 20.a4 a6 21.Nc6 Qe8 22.Rf3 Bxc6 23.Rg3 Nh5 24.Qxh5 (0:00:00) 202kN
[-0.55] d=9 19.Nd4 Qc8 20.a4 bxa4 21.Bxa4 Bxa4 22.Rxa4 Nxe4 23.Qxe7 Nd2 24.Rd1 Re8 25.Qxd6 Rxe3 26.Rxd2 Re1 27.Kf2 (0:00:00) 159kN
[-0.59] d=9 19.a4 Qb8 20.Nd4 Qb6 21.Rf3 Qa6 22.Rg3 Nce8 23.Qh4 (0:00:00) 120kN
[-0.82] d=9 19.Rad1 Qb8 20.e5 dxe5 21.Nxe5 Rd8 22.Qg3 Qb6 23.d6 Ncd5 24.dxe7 Nxe7 25.Nxd7 Rxd7 26.Rxd7 (0:00:00) 103kN
[-0.71] d=8 19.Rad1 a5 20.Nd4 Qb8 21.a4 Qb6 22.Qh4 Rab8 23.axb5 (0:00:00) 58kN
[-0.73] d=8 19.Qh4 Na6 20.Nd4 Qb6 21.Rf3 Rab8 22.Rg3 Nc7 (0:00:00) 48kN

It's the 1st position that I think is hard for computers.

[d]r2q1rk1/p1nbppb1/3p3p/1ppP1Ppn/4P2B/2P2N2/PPBQ2PP/R2N1RK1 w - - 0 16
"Good decisions come from experience, and experience comes from bad decisions."
__________________________________________________________________
Ted Summers
Top
kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Test position: Very tough and just tough

Post by kgburcham »

[d] r2q1rk1/p1nbppb1/3p1n2/1p1P1PQ1/2p1P3/2P1NN2/PPB3PP/R4RK1 w - -

4 threads

Houdini 1.5a x64
by Robert Houdart

18/51 0:11 -0.32++ 1.Qh4 (80.756.366) 7140
18/61 0:20 -0.20 1.Qh4 Qb8 2.g4 Qb6 3.Rae1 Rfd8 4.g5 Nfe8 5.Qh5 a5 6.f6 exf6 7.Nd4 Na6 8.Rf3 Nb4 9.Ref1 Nxc2 10.Nexc2 f5 11.exf5 Be5 12.Rh3 Nc7 13.g6 Kf8 14.Qh7 (147.060.701) 7153
19/61 0:23 -0.14++ 1.Qh4 (166.972.771) 7157
19/61 0:35 -0.27-- 1.Qh4 Qb8 (257.903.029) 7224
19/61 0:38 -0.06 1.Qh4 Na6 2.g4 Qb6 3.Rae1 Rfb8 4.g5 Ne8 5.g6 Nf6 6.e5 dxe5 7.gxf7+ Kxf7 8.Nxe5+ Kg8 9.Nxd7 Nxd7 10.Qxe7 Nf6 11.Qe6+ Kf8 12.a4 Nc5 13.Qxb6 axb6 14.axb5 (275.776.730) 7220
20/61 0:50 0.00++ 1.Qh4 (369.741.511) 7258
20/61 1:13 +0.13++ 1.Qh4 (533.467.727) 7276
20/61 1:57 +0.14 1.Qh4 Qb8 2.g4 Qb6 3.Rae1 Rfe8 4.g5 Nh7 5.Kg2 Rab8 6.g6 Nf6 7.e5 dxe5 8.Nxe5 Red8 9.Nxf7 Re8 10.Be4 Kf8 11.Ng5 Qd6 12.Nh7+ Nxh7 13.Qxh7 Qa6 14.a3 (856.946.547) 7302
21/61 2:28 +0.21++ 1.Qh4 (1.090.510.952) 7365
21/61 3:00 +0.22 1.Qh4 Qb8 2.g4 Qb6 3.Rae1 Nh7 4.g5 Rfe8 5.Kg2 f6 6.g6 Nf8 7.Nd4 b4 8.Nxc4 Qc5 9.Bd3 bxc3 10.bxc3 Nb5 11.Ne2 Rab8 12.Rb1 Na3 13.Nxa3 Qxa3 14.Bc4 (1.332.628.660) 7393
21/61 3:07 +0.22 1.Qh4 Qb8 2.g4 Qb6 3.Rae1 Nh7 4.g5 Rfe8 5.Kg2 f6 6.g6 Nf8 7.Nd4 b4 8.Nxc4 Qc5 9.Bd3 bxc3 10.bxc3 Nb5 11.Ne2 Rab8 12.Rb1 Na3 13.Nxa3 Qxa3 14.Bc4 (1.386.901.788) 7401
Top
User avatar
Eelco de Groot
Posts: 4708
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test position: Very tough and just tough

Post by Eelco de Groot »

Could somebody maybe run a little longer analysis of the "just tough" position? Komodo posted by Ted only shows -0.02 but that is after only four minutes. Rainbow Serpent never shows a plus, in two move multi PV Qh4 is the second move but the line shown does not contain g4-g5-g6 anymore. It could well be that Rainbow Serpent lost the line at great depth, I would check it but for that I need a computer that can allocate bigger hashtable space.

At 27 plies the score is negative, so in the first position White would always withdraw the bishop, there is not enough compensation for it.

[d]r2q1rk1/p1nbppb1/3p1n2/1p1P1PQ1/2p1P3/2P1NN2/PPB3PP/R4RK1 w - -

Engine: Rainbow Serpent 2.0 Build 110 (Athlon 2009 MHz, 256 MB)
by Romstad, Costalba, Kiiski

27 305:26 -0.46 1.Nd4 Nh7 2.Qg4 Kh8 3.Nc6 Bxc6
4.dxc6 Ne8 5.Qh3 Nef6 6.g4 Qb6 7.g5 Ng4 (7.666.761.137) 418

27 305:26 -0.55 1.Qh4 b4 2.cxb4 Na6 3.a3 Qb6 4.Rae1 Bb5
5.e5 dxe5 6.Nxe5 c3 7.bxc3 Bxf1
8.Kxf1 Qc7 9.Nc6 Nb8 10.Qg3 Rc8
11.b5 Qxg3 12.hxg3 Nxc6 13.dxc6 (7.666.761.137) 418
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
Top
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test position: Very tough and just tough

Post by zullil »

Stockfish-2.0.1 (8 threads):

Code: Select all

Searching: r2q1rk1/p1nbppb1/3p1n2/1p1P1PQ1/2p1P3/2P1NN2/PPB3PP/R4RK1 w - -
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0
 1     -1.62   00:00     1486 Nd4 
 2     -1.54   00:00     1682 Nd4 a5 
 2     -1.33   00:00     2058 b3 Nh7 
 3     -1.41   00:00     2613 b3 Nh7 Qg3 
 4     -1.21   00:00     3260 b3 cxb3 axb3 a5 
 5     -1.62   00:00     5622 b3 b4 cxb4 c3 Nd4 
 6     -1.62   00:00     7268 b3 b4 cxb4 c3 Bd3 Rb8 
 6     -1.41   00:00     9441 a4 a6 Nd4 Nh7 Qg3 Nf6 axb5 axb5 Rxa8 Qxa8 
 7     -1.09   00:00    28761 a4 a6 Nd4 Qe8 Rf2 Ra7 axb5 Bxb5 Nxb5 Qxb5 
 8     -1.09   00:00    33945 a4 a6 Nd4 Qe8 Rf2 Ra7 axb5 Bxb5 Nxb5 Qxb5 
 9     -1.13   00:00    57198 a4 a6 Nd4 Qe8 Rf2 Rd8 axb5 Bxb5 h4 Rb8 h5 Qc8 
10  >  -1.05   00:00   100297 a4 a6 Nd4 Qe8 Rf2 Rd8 h4 Rb8 h5 Nh7 Qg3 
10  >  -0.97   00:00   139717 a4 a6 Nd4 Qe8 Rf2 Rd8 h4 Rb8 h5 Nh7 Qg3 
10  <  -1.21   00:00   198141 a4 a6 Nd4 bxa4 Nxc4 Nb5 Nc6 Bxc6 dxc6 Qc7 e5 dxe5 
                              Bxa4 Qxc6 Nxe5 Qc5+ 
10  >  -0.81   00:00   244280 Nd4 a5 Rf3 Nh7 Qg3 Ra6 a4 
10     -0.81   00:00   413412 Nd4 Qc8 Rf3 Qa6 Rg3 Nce8 Rh3 Rc8 Rg3 Rd8 Qh6 
11     -0.85   00:00   484083 Nd4 Qc8 Rf3 Nce8 Rg3 Qc5 Rh3 a6 Re1 b4 Rb1 
12  <  -1.05   00:00   789180 Nd4 Rc8 Rf3 Nce8 Rg3 b4 Qh6 bxc3 bxc3 Qa5 
12     -1.01   00:00   974009 Nd4 Rc8 Rf3 Nce8 a3 a6 Rg3 Rc5 Qh4 Qa5 Kh1 Qb6 
                              Rg1 
13     -0.89   00:00    1099K Nd4 Rc8 Rf3 Nce8 a3 a6 Rg3 Rc5 Qh4 Qa5 Kh1 Qb6 
                              Qh6 Rc8 
14     -0.73   00:01    2048K Nd4 Nce8 Rf3 Nh7 Qh5 Qa5 Rg3 Nhf6 Qh4 Rc8 Bd1 b4 
                              cxb4 Qxb4 
15     -0.73   00:01    3112K Nd4 Nce8 Rf3 Rb8 Rg3 Rc8 a3 Rb8 Qh4 Qb6 Bd1 Rd8 
                              Bf3 a6 Bh5 Nxh5 Qxh5 Nf6 
16  >  -0.65   00:01    4265K Nd4 Nce8 Rf3 Rb8 Rg3 Rc8 a3 Rb8 Qh4 Qb6 Bd1 Rd8 
                              Bf3 a6 Be2 Qc5 a4 
16     -0.65   00:01    4476K Nd4 Nce8 Rf3 Rb8 Rg3 Rc8 a3 a6 Qh4 Qb6 Bd1 a5 Be2 
                              Qa6 Bh5 Nxh5 Qxh5 Nf6 
17  <  -0.73   00:01    5579K Nd4 Nce8 Rf3 Rc8 a3 a5 Rg3 b4 axb4 axb4 Qh4 bxc3 
                              bxc3 Ra8 
17  <  -0.81   00:01    5892K Nd4 Nce8 Rf3 Rc8 a3 a5 Rg3 b4 axb4 axb4 Qh4 bxc3 
                              bxc3 Ra8 
17  <  -0.97   00:02    8400K Nd4 Nce8 Nc6 Bxc6 dxc6 Qb6 
17     -0.89   00:02   10648K Nd4 Nce8 Qh4 Qb6 Rf3 Rc8 a3 a5 Rg3 b4 axb4 axb4 
                              Bd1 bxc3 bxc3 Qb2 Nec2 Rc7 Be2 Rc5 Ra7 Qc1+ Bf1 
                              Rc8 Nb4 
18  >  -0.61   00:03   12348K Nd4 Nce8 Qh4 Qb6 Rf3 Rc8 a3 a5 Rg3 b4 axb4 axb4 
                              Bd1 bxc3 bxc3 Qb2 Nec2 Rc7 Be2 Rc5 Bd1 Nc7 Qg5 
                              Nce8 Qh4 
18     -0.73   00:04   20591K Nd4 Nce8 Qh4 Qb6 Rae1 Nh7 Qxe7 Bc8 Qh4 Bxd4 cxd4 
                              Qxd4 Rf3 Qf6 Qf4 Qxb2 Rb1 Qf6 Rg3+ Ng7 Rxb5 Ba6 
                              Ra5 Qa1+ Bd1 
19     -0.57   00:07   43715K Nd4 Rc8 Rf3 Nh7 Qh5 Ne8 Qh4 b4 Rh3 Nef6 Ng4 bxc3 
                              bxc3 Qc7 Rg3 Nxg4 Qxg4 
20  >  -0.32   00:09   55553K Nd4 Rc8 Rf3 Nh7 Qh5 Ne8 Qh4 b4 Rh3 Nef6 Ng4 bxc3 
                              bxc3 Qc7 Rg3 Nxg4 Qxg4 
20     -0.32   00:12   72169K Nd4 b4 Rf3 bxc3 bxc3 Rb8 Nxc4 Nce8 Qh4 Qc8 Nd2 
                              Rb2 Rg3 Qc5 Kh1 a6 a4 a5 Qg5 Bc8 
21     -0.32   00:12   77419K Nd4 b4 Rf3 bxc3 bxc3 Rb8 Nxc4 Nce8 Qh4 Qc8 Nd2 
                              Rb2 Rg3 Qc5 Kh1 a6 a4 a5 Qg5 Bc8 Rb1 Rxb1+ Bxb1 
                              Ba6 
22  >  -0.20   00:14   85966K Nd4 b4 Rf3 bxc3 bxc3 Rb8 Rh3 Nb5 Nxb5 Bxb5 e5 
                              dxe5 Rg3 Ne8 f6 exf6 Qf5 
22  >  -0.08   00:15   95014K Nd4 b4 Rf3 bxc3 bxc3 Rb8 Rh3 Nb5 Nxb5 Bxb5 e5 
                              dxe5 Rg3 Ne8 f6 exf6 Qf5 
22  <  -0.44   00:21  131725K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Qg6+ Kh8 Ng4 Rg8 Qh5 Rg7 
                              Qh4 Kg8 
22     -0.32   00:25  156554K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Rac1 Rf7 Qe2 Rg7 h4 Rc8 
                              Qd2 Be8 Bd1 Nf8 b3 cxb3 axb3 Nd7 Be2 Rh7 g3 Bh5 
                              g4 
23  <  -0.40   00:26  167111K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Rac1 Rf7 Qe2 Rg7 h4 Rc8 
                              Bd1 Na8 h5 Ng5 h6 Rh7 Qh5 Nxe4 
23  <  -0.48   00:29  182424K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Rf3 Rf7 Rg3+ Rg7 Ng4 Be8 
                              Qh6 Ng5 Re3 Rh7 
23     -0.44   00:33  209602K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 b3 c3 Rf3 Qe8 Rg3+ Kh8 
                              Rg6 Rg8 Rf1 b4 Rf3 Rg7 Bd1 Qf7 Nc2 a5 Rfg3 Rag8 
                              Qh6 Nb5 Be2 Rxg6 
24  >  -0.32   00:35  226918K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 b3 c3 Rf3 Qe8 Qh4 Kh8 
                              Bd1 b4 Nc2 
24  >  -0.20   00:37  239239K Nd4 Rc8 Rf3 Nh7 Qh5 Ne8 Qh4 b4 Rh3 Nef6 g4 bxc3 
                              bxc3 Qb6 g5 Qb2 Rd1 
24     -0.53   01:00  404715K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Ng4 Kh8 a3 Rg8 Nh6 Rg7 
                              Bd1 Qb8 Be2 a5 Qh4 Qb6 Rfd1 b4 axb4 Qxb4 Ng4 Rb8 
24  >  +0.04   01:22  557496K Qh4 Qb8 g4 Qb6 Rae1 b4 g5 Nh7 g6 Nf6 e5 dxe5 Nxe5 
                              Be8 Rf2 bxc3 bxc3 Qc5 N5g4 fxg6 fxg6 Nxg4 Qh7# 
24  >  +0.53   01:41  693983K Qh4 Qb8 g4 Qb6 Rae1 b4 g5 Nxe4 Qxe4 bxc3 bxc3 
                              Bxc3 f6 
24     +1.01   03:01    1263M Qh4 Na6 g4 Qb6 Rae1 Rfd8 g5 Ne8 g6 Nf6 Kh1 fxg6 
                              fxg6 Nc5 e5 dxe5 Nxe5 Kf8 Bf5 Be8 Bh3 Nd7 Nf5 
25     +0.89   03:38    1534M Qh4 b4 g4 b3 axb3 cxb3 Bxb3 Nh7 g5 Qb8 g6 fxg6 
                              fxg6 Nf6 Nd2 Qe8 Qg5 a5 Bc2 a4 Ndc4 Bb5 Bd3 a3 
                              bxa3 Bxc4 Nxc4 Nd7 Rxf8+ Qxf8 Rf1 Bf6 
26     +1.13   04:21    1836M Qh4 b4 g4 b3 axb3 cxb3 Bxb3 Qb8 Nd2 Nh7 g5 Qb6 
                              Rf3 f6 g6 Ng5 Rg3 Rfd8 Ra2 Bb5 Nc4 Bxc4 Bxc4 Rac8 
                              e5 Re8 
27     +1.05   05:58    2559M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 Qd6 Rd1 
                              Qb6 Rd7 
28  >  +1.25   06:35    2826M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 Qd6 Qxa7 
                              Nf8 Nxf8 Rxf8 
28     +1.25   07:02    3018M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 Qd6 Qxa7 
                              Nf8 Nxf8 Rxf8 Qb7 e5 Qe4 Qb6+ Kh1 Qe6 Qg6+ Bg7 
                              Rxf8+ Kxf8 Rf1+ Kg8 Qxe6+ Nxe6 g3 Nc5 Kg2 
29  <  +1.01   07:30    3225M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 a6 h4 e5 
                              Qg3 Bg7 Rf5 Qd3 Qg4 e4 Ne5 Qd6 Qxe4 Nf6 Qd4 Qxd4+ 
                              cxd4 Ne6 Rd1 Ne4 g4 Nd6 
29     +1.05   07:52    3385M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 a6 h4 e5 
                              Qg3 Bg7 Rf5 Qd3 Qg4 e4 Ne5 Qd6 Qxe4 Nf6 Qd4 
30     +1.05   08:49    3799M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 Ne6 Qg3 
                              Qc5+ Kh1 Ng7 Ne5 Rd8 Ng4 Kh8 Nxf6 exf6 Rd1 Qe7 
                              Rxd8+ 
31  >  +1.17   12:12    5317M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 e6 Be8 Qh3 Nf6 Nxf5 
                              Ncxd5 Nh6+ Bxh6 Qxh6 Qb6+ Kh1 Ne3 Ng5 Nxc2 Rxf6 
31  >  +1.29   15:16    6690M Qh4 
31  >  +1.54   27:01   12012M Qh4 b4 g4 b3 axb3 cxb3 Bxb3 Qb8 Nd2 Nh7 g5 Qb6 
                              Rf3 f6 g6 Ng5 Rg3 Rfb8 Ra2 Bb5 Nc4 Bxc4 Bxc4 a5 
                              Qg4 Nb5 Bf1 Nc7 
31     +1.49   47:31   21363M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 Ne8 Ne7+ Kh8 Nxc8 Rxc8 Rxf5 Nxd6 
                              Rxg5 Rfe8 Kf2 Re6 Nf5 Bf6 Rh5+ Kg8 Rd1 Nxf5 Bxf5 
                              Re5 Rd6 Be7 Rd7 Bc5+ Kg3 Rce8 h4 a6 Kg4 a5 Kf3
Top
User avatar
Eelco de Groot
Posts: 4708
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test position: Very tough and just tough

Post by Eelco de Groot »

zullil wrote:Stockfish-2.0.1 (8 threads):

Code: Select all

Searching: r2q1rk1/p1nbppb1/3p1n2/1p1P1PQ1/2p1P3/2P1NN2/PPB3PP/R4RK1 w - -
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0
 1     -1.62   00:00     1486 Nd4 
 2     -1.54   00:00     1682 Nd4 a5 
 2     -1.33   00:00     2058 b3 Nh7 
 3     -1.41   00:00     2613 b3 Nh7 Qg3 
 4     -1.21   00:00     3260 b3 cxb3 axb3 a5 
 5     -1.62   00:00     5622 b3 b4 cxb4 c3 Nd4 
 6     -1.62   00:00     7268 b3 b4 cxb4 c3 Bd3 Rb8 
 6     -1.41   00:00     9441 a4 a6 Nd4 Nh7 Qg3 Nf6 axb5 axb5 Rxa8 Qxa8 
 7     -1.09   00:00    28761 a4 a6 Nd4 Qe8 Rf2 Ra7 axb5 Bxb5 Nxb5 Qxb5 
 8     -1.09   00:00    33945 a4 a6 Nd4 Qe8 Rf2 Ra7 axb5 Bxb5 Nxb5 Qxb5 
 9     -1.13   00:00    57198 a4 a6 Nd4 Qe8 Rf2 Rd8 axb5 Bxb5 h4 Rb8 h5 Qc8 
10  >  -1.05   00:00   100297 a4 a6 Nd4 Qe8 Rf2 Rd8 h4 Rb8 h5 Nh7 Qg3 
10  >  -0.97   00:00   139717 a4 a6 Nd4 Qe8 Rf2 Rd8 h4 Rb8 h5 Nh7 Qg3 
10  <  -1.21   00:00   198141 a4 a6 Nd4 bxa4 Nxc4 Nb5 Nc6 Bxc6 dxc6 Qc7 e5 dxe5 
                              Bxa4 Qxc6 Nxe5 Qc5+ 
10  >  -0.81   00:00   244280 Nd4 a5 Rf3 Nh7 Qg3 Ra6 a4 
10     -0.81   00:00   413412 Nd4 Qc8 Rf3 Qa6 Rg3 Nce8 Rh3 Rc8 Rg3 Rd8 Qh6 
11     -0.85   00:00   484083 Nd4 Qc8 Rf3 Nce8 Rg3 Qc5 Rh3 a6 Re1 b4 Rb1 
12  <  -1.05   00:00   789180 Nd4 Rc8 Rf3 Nce8 Rg3 b4 Qh6 bxc3 bxc3 Qa5 
12     -1.01   00:00   974009 Nd4 Rc8 Rf3 Nce8 a3 a6 Rg3 Rc5 Qh4 Qa5 Kh1 Qb6 
                              Rg1 
13     -0.89   00:00    1099K Nd4 Rc8 Rf3 Nce8 a3 a6 Rg3 Rc5 Qh4 Qa5 Kh1 Qb6 
                              Qh6 Rc8 
14     -0.73   00:01    2048K Nd4 Nce8 Rf3 Nh7 Qh5 Qa5 Rg3 Nhf6 Qh4 Rc8 Bd1 b4 
                              cxb4 Qxb4 
15     -0.73   00:01    3112K Nd4 Nce8 Rf3 Rb8 Rg3 Rc8 a3 Rb8 Qh4 Qb6 Bd1 Rd8 
                              Bf3 a6 Bh5 Nxh5 Qxh5 Nf6 
16  >  -0.65   00:01    4265K Nd4 Nce8 Rf3 Rb8 Rg3 Rc8 a3 Rb8 Qh4 Qb6 Bd1 Rd8 
                              Bf3 a6 Be2 Qc5 a4 
16     -0.65   00:01    4476K Nd4 Nce8 Rf3 Rb8 Rg3 Rc8 a3 a6 Qh4 Qb6 Bd1 a5 Be2 
                              Qa6 Bh5 Nxh5 Qxh5 Nf6 
17  <  -0.73   00:01    5579K Nd4 Nce8 Rf3 Rc8 a3 a5 Rg3 b4 axb4 axb4 Qh4 bxc3 
                              bxc3 Ra8 
17  <  -0.81   00:01    5892K Nd4 Nce8 Rf3 Rc8 a3 a5 Rg3 b4 axb4 axb4 Qh4 bxc3 
                              bxc3 Ra8 
17  <  -0.97   00:02    8400K Nd4 Nce8 Nc6 Bxc6 dxc6 Qb6 
17     -0.89   00:02   10648K Nd4 Nce8 Qh4 Qb6 Rf3 Rc8 a3 a5 Rg3 b4 axb4 axb4 
                              Bd1 bxc3 bxc3 Qb2 Nec2 Rc7 Be2 Rc5 Ra7 Qc1+ Bf1 
                              Rc8 Nb4 
18  >  -0.61   00:03   12348K Nd4 Nce8 Qh4 Qb6 Rf3 Rc8 a3 a5 Rg3 b4 axb4 axb4 
                              Bd1 bxc3 bxc3 Qb2 Nec2 Rc7 Be2 Rc5 Bd1 Nc7 Qg5 
                              Nce8 Qh4 
18     -0.73   00:04   20591K Nd4 Nce8 Qh4 Qb6 Rae1 Nh7 Qxe7 Bc8 Qh4 Bxd4 cxd4 
                              Qxd4 Rf3 Qf6 Qf4 Qxb2 Rb1 Qf6 Rg3+ Ng7 Rxb5 Ba6 
                              Ra5 Qa1+ Bd1 
19     -0.57   00:07   43715K Nd4 Rc8 Rf3 Nh7 Qh5 Ne8 Qh4 b4 Rh3 Nef6 Ng4 bxc3 
                              bxc3 Qc7 Rg3 Nxg4 Qxg4 
20  >  -0.32   00:09   55553K Nd4 Rc8 Rf3 Nh7 Qh5 Ne8 Qh4 b4 Rh3 Nef6 Ng4 bxc3 
                              bxc3 Qc7 Rg3 Nxg4 Qxg4 
20     -0.32   00:12   72169K Nd4 b4 Rf3 bxc3 bxc3 Rb8 Nxc4 Nce8 Qh4 Qc8 Nd2 
                              Rb2 Rg3 Qc5 Kh1 a6 a4 a5 Qg5 Bc8 
21     -0.32   00:12   77419K Nd4 b4 Rf3 bxc3 bxc3 Rb8 Nxc4 Nce8 Qh4 Qc8 Nd2 
                              Rb2 Rg3 Qc5 Kh1 a6 a4 a5 Qg5 Bc8 Rb1 Rxb1+ Bxb1 
                              Ba6 
22  >  -0.20   00:14   85966K Nd4 b4 Rf3 bxc3 bxc3 Rb8 Rh3 Nb5 Nxb5 Bxb5 e5 
                              dxe5 Rg3 Ne8 f6 exf6 Qf5 
22  >  -0.08   00:15   95014K Nd4 b4 Rf3 bxc3 bxc3 Rb8 Rh3 Nb5 Nxb5 Bxb5 e5 
                              dxe5 Rg3 Ne8 f6 exf6 Qf5 
22  <  -0.44   00:21  131725K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Qg6+ Kh8 Ng4 Rg8 Qh5 Rg7 
                              Qh4 Kg8 
22     -0.32   00:25  156554K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Rac1 Rf7 Qe2 Rg7 h4 Rc8 
                              Qd2 Be8 Bd1 Nf8 b3 cxb3 axb3 Nd7 Be2 Rh7 g3 Bh5 
                              g4 
23  <  -0.40   00:26  167111K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Rac1 Rf7 Qe2 Rg7 h4 Rc8 
                              Bd1 Na8 h5 Ng5 h6 Rh7 Qh5 Nxe4 
23  <  -0.48   00:29  182424K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Rf3 Rf7 Rg3+ Rg7 Ng4 Be8 
                              Qh6 Ng5 Re3 Rh7 
23     -0.44   00:33  209602K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 b3 c3 Rf3 Qe8 Rg3+ Kh8 
                              Rg6 Rg8 Rf1 b4 Rf3 Rg7 Bd1 Qf7 Nc2 a5 Rfg3 Rag8 
                              Qh6 Nb5 Be2 Rxg6 
24  >  -0.32   00:35  226918K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 b3 c3 Rf3 Qe8 Qh4 Kh8 
                              Bd1 b4 Nc2 
24  >  -0.20   00:37  239239K Nd4 Rc8 Rf3 Nh7 Qh5 Ne8 Qh4 b4 Rh3 Nef6 g4 bxc3 
                              bxc3 Qb6 g5 Qb2 Rd1 
24     -0.53   01:00  404715K Nd4 Nh7 Qh5 Bxd4 cxd4 f6 Ng4 Kh8 a3 Rg8 Nh6 Rg7 
                              Bd1 Qb8 Be2 a5 Qh4 Qb6 Rfd1 b4 axb4 Qxb4 Ng4 Rb8 
24  >  +0.04   01:22  557496K Qh4 Qb8 g4 Qb6 Rae1 b4 g5 Nh7 g6 Nf6 e5 dxe5 Nxe5 
                              Be8 Rf2 bxc3 bxc3 Qc5 N5g4 fxg6 fxg6 Nxg4 Qh7# 
24  >  +0.53   01:41  693983K Qh4 Qb8 g4 Qb6 Rae1 b4 g5 Nxe4 Qxe4 bxc3 bxc3 
                              Bxc3 f6 
24     +1.01   03:01    1263M Qh4 Na6 g4 Qb6 Rae1 Rfd8 g5 Ne8 g6 Nf6 Kh1 fxg6 
                              fxg6 Nc5 e5 dxe5 Nxe5 Kf8 Bf5 Be8 Bh3 Nd7 Nf5 
25     +0.89   03:38    1534M Qh4 b4 g4 b3 axb3 cxb3 Bxb3 Nh7 g5 Qb8 g6 fxg6 
                              fxg6 Nf6 Nd2 Qe8 Qg5 a5 Bc2 a4 Ndc4 Bb5 Bd3 a3 
                              bxa3 Bxc4 Nxc4 Nd7 Rxf8+ Qxf8 Rf1 Bf6 
26     +1.13   04:21    1836M Qh4 b4 g4 b3 axb3 cxb3 Bxb3 Qb8 Nd2 Nh7 g5 Qb6 
                              Rf3 f6 g6 Ng5 Rg3 Rfd8 Ra2 Bb5 Nc4 Bxc4 Bxc4 Rac8 
                              e5 Re8 
27     +1.05   05:58    2559M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 Qd6 Rd1 
                              Qb6 Rd7 
28  >  +1.25   06:35    2826M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 Qd6 Qxa7 
                              Nf8 Nxf8 Rxf8 
28     +1.25   07:02    3018M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 Qd6 Qxa7 
                              Nf8 Nxf8 Rxf8 Qb7 e5 Qe4 Qb6+ Kh1 Qe6 Qg6+ Bg7 
                              Rxf8+ Kxf8 Rf1+ Kg8 Qxe6+ Nxe6 g3 Nc5 Kg2 
29  <  +1.01   07:30    3225M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 a6 h4 e5 
                              Qg3 Bg7 Rf5 Qd3 Qg4 e4 Ne5 Qd6 Qxe4 Nf6 Qd4 Qxd4+ 
                              cxd4 Ne6 Rd1 Ne4 g4 Nd6 
29     +1.05   07:52    3385M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 a6 h4 e5 
                              Qg3 Bg7 Rf5 Qd3 Qg4 e4 Ne5 Qd6 Qxe4 Nf6 Qd4 
30     +1.05   08:49    3799M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 Nxf5 Rxf5 Bxf5 Bxf5 
                              Qxf5 dxe5 Nxe5 Qxd5 Ng6 Re8 Rae1 Bf6 Qf2 Ne6 Qg3 
                              Qc5+ Kh1 Ng7 Ne5 Rd8 Ng4 Kh8 Nxf6 exf6 Rd1 Qe7 
                              Rxd8+ 
31  >  +1.17   12:12    5317M Qh4 Nh7 f6 Bxf6 Qh5 Bg7 e5 f5 e6 Be8 Qh3 Nf6 Nxf5 
                              Ncxd5 Nh6+ Bxh6 Qxh6 Qb6+ Kh1 Ne3 Ng5 Nxc2 Rxf6 
31  >  +1.29   15:16    6690M Qh4 
31  >  +1.54   27:01   12012M Qh4 b4 g4 b3 axb3 cxb3 Bxb3 Qb8 Nd2 Nh7 g5 Qb6 
                              Rf3 f6 g6 Ng5 Rg3 Rfb8 Ra2 Bb5 Nc4 Bxc4 Bxc4 a5 
                              Qg4 Nb5 Bf1 Nc7 
31     +1.49   47:31   21363M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 Ne8 Ne7+ Kh8 Nxc8 Rxc8 Rxf5 Nxd6 
                              Rxg5 Rfe8 Kf2 Re6 Nf5 Bf6 Rh5+ Kg8 Rd1 Nxf5 Bxf5 
                              Re5 Rd6 Be7 Rd7 Bc5+ Kg3 Rce8 h4 a6 Kg4 a5 Kf3
Thanks Louis! Seaching with more than one thread can really help getting to the core of a position. In multi PV 28 plies is about the limit what I can do. That took about ten hours! With some more hash I think it would have been a little faster but the Athlon is just too slow. Qh4 is now the best move:

Two best moves Multi PV.

r2q1rk1/p1nbppb1/3p1n2/1p1P1PQ1/2p1P3/2P1NN2/PPB3PP/R4RK1 w - -

Engine: Rainbow Serpent 2.0 Build 110 (Athlon 2009 MHz, 256 MB)
by Romstad, Costalba, Kiiski

28 641:45 -0.01 1.Qh4 Nce8 2.g4 (16.135.986.360) 419

28 641:45 -0.46 1.Nd4 Nh7 2.Qg4 Kh8 3.Nc6 Bxc6
4.dxc6 Ne8 5.Qh3 Nef6 6.g4 Qb6 7.g5 Ng4 (16.135.986.360) 419

Well at least the position evaluation was still moving in the right direction... Your result shows it should be possible to get a more positive evaluation!

Usually Albert is right but the chessprograms may not be up to finding these deep King attacks yet, and they have to be programmed cautiously if you want to maximize elo, because they are not so good at seeing when something is possible or not. So it is good to have the confirmation from the eight headed former dragon! Thanks!

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
Top
Martin Thoresen
Posts: 1833
Joined: Thu Jun 22, 2006 12:07 am

Re: Test position: Very tough and just tough

Post by Martin Thoresen »

Here's 1 hour and 42 minutes with Houdini on the TCEC computer, 8 GB hash with Large Pages:

[d]

Code: Select all

Houdini 1.5a t6:
  4/17	00:00	       1 870	0	-0,88	19.b3 Rc8 20.bxc4 bxc4 21.Rab1
  5/17	00:00	       2 794	0	-0,88	19.b3 Rc8 20.Nd4 Na6 21.bxc4 bxc4
  5/17	00:00	       4 060	253 000	-0,86	19.a4 a6 20.Nd4 Qe8 21.axb5 axb5
  6/17	00:00	       5 296	331 000	-0,75	19.a4 a6 20.Nd4 Qe8 21.Rf3 Qc8 22.Nc6
  7/17	00:00	       6 611	413 000	-0,70	19.a4 a6 20.Nd4 Qe8 21.Rf3 Nh7 22.Qh4
  8/18+	00:00	       9 858	616 000	-0,61	19.a4
  8/19	00:00	      16 901	1 056 000	-0,51	19.a4 a6 20.Nd4 Be8 21.Nc6 Bxc6 22.dxc6 Qe8 23.axb5 axb5 24.Rxa8 Qxa8
  9/25	00:00	      92 293	2 251 000	-0,54	19.a4 bxa4 20.Nd2 Rb8 21.Ndxc4 Rb7 22.Qg3 Bb5 23.h4 Qd7
 10/27-	00:00	     153 781	3 271 000	-0,61	19.a4 bxa4
 10/27	00:00	     191 501	3 419 000	-0,54	19.a4 b4 20.Nxc4 bxc3 21.bxc3 Rc8 22.Ne3 Na6 23.e5 dxe5 24.Nxe5 Rxc3 25.Rab1
 11/27-	00:00	     218 054	3 634 000	-0,61	19.a4 b4
 11/29	00:00	     691 536	6 649 000	-0,55	19.a4 Qb8 20.Nd4 bxa4 21.Nxc4 Bb5 22.Nxb5 Qxb5 23.Rxa4 Nxe4 24.Qxe7 Qc5+ 25.Kh1 Nf2+ 26.Kg1 Nd3+ 27.Kh1 Nxd5 28.Qxd6 Qxd6 29.Nxd6 Nxb2
 12/29	00:00	     778 424	6 768 000	-0,55	19.a4 Qb8 20.Nd4 bxa4 21.Nxc4 Bb5 22.Nxb5 Qxb5 23.Rxa4 Nxe4 24.Qxe7 Qc5+ 25.Kh1 Nf2+ 26.Kg1 Nd3+ 27.Kh1 Nxd5 28.Qxd6 Qxd6 29.Nxd6 Nxb2
 13/29+	00:00	   1 149 285	7 765 000	-0,48	19.a4
 13/35	00:00	   2 038 986	9 617 000	-0,57	19.a4 b4 20.Nxc4 bxc3 21.bxc3 Qc8 22.Ne3 Na6 23.e5 dxe5 24.Nxe5 Qxc3 25.Nxd7 Nxd7 26.Rab1 Rfe8 27.Rb3 Qd2 28.Bd3
 14/35+	00:00	   2 521 801	9 967 000	-0,51	19.a4
 14/35	00:00	   2 874 462	10 121 000	-0,49	19.a4 b4 20.Nxc4 Qc8 21.Nfd2 bxc3 22.bxc3 Rb8 23.Rf3 Rd8 24.Rg3 Nce8 25.Qe3 Qc7 26.Qd4 Kf8 27.e5
 15/35	00:01	   4 455 096	11 336 000	-0,47	19.a4 b4 20.Nxc4 Qc8 21.Nfd2 bxc3 22.bxc3 Rb8 23.Qe3 a5 24.Rab1 Qa6 25.h3 Rfe8 26.Nb6 Kf8 27.Bd3
 16/35-	00:01	   5 358 110	11 750 000	-0,54	19.a4 b4
 16/41	00:01	   9 659 166	13 359 000	-0,54	19.a4 b4 20.Nxc4 Qc8 21.Nfd2 bxc3 22.bxc3 Rb8 23.Rad1 Rd8 24.h4 Kf8 25.h5 Ng8 26.Qe3 Bh6 27.Qxa7 Nf6 28.Qd4 Qa6 29.Rb1 Bxa4 30.Bxa4 Qxa4
 16/46	00:01	  17 081 335	14 562 000	-0,53	19.e5 dxe5 20.Nxe5 Nce8 21.Rf3 Qc7 22.Nxd7 Qxd7 23.a4 b4 24.cxb4 Qd6 25.Nxc4 Qxb4 26.Ne3 Qxb2 27.Rb1 Qd4 28.Rd1 Qc5 29.Rg3 Rc8 30.Qh4
 17/46+	00:02	  22 688 056	14 770 000	-0,46	19.e5
 17/46	00:02	  24 897 213	14 810 000	-0,45	19.e5 dxe5 20.Nxe5 Nce8 21.Rf3 Qc7 22.Nxd7 Qxd7 23.Rg3 a6 24.Re1 Qc7 25.a4 Qe5 26.Rd1 Rd8 27.Bb1 Qd6 28.Kh1 Qb6 29.axb5 axb5
 18/46+	00:02	  29 234 829	14 953 000	-0,39	19.e5
 18/48+	00:03	  45 345 941	15 609 000	-0,25	19.e5
 18/51	00:06	  92 364 181	16 426 000	-0,10	19.e5 dxe5 20.Nxe5 Nce8 21.Rf3 Nh7 22.Qh4 f6 23.Nc6 Bxc6 24.dxc6 Ng5 25.Rg3 Qb6 26.Qf4 Rd8 27.a4 Rd2 28.h4 Nf7 29.Be4 bxa4 30.Rxa4 Ne5 31.Rb4
 19/51+	00:08	 129 397 958	16 739 000	-0,04	19.e5
 19/51	00:10	 164 684 623	16 838 000	 0,00	19.e5 dxe5 20.Nxe5 Nce8 21.Rf3 Nh7 22.Qh4 f6 23.Nxd7 Qxd7 24.Rg3 Ng5 25.a4 Nd6 26.Qf4 Ngf7 27.Qg4 Ne8 28.Qd4 Ne5 29.Ng4 Nxg4 30.Rxg4 Nd6 31.Rxg7+ Kxg7 32.Qg4+ Kh8 33.Qh3+ Kg8 34.Qg3+ Kh8 35.Qh3+ Kg8
 20/62	00:14	 245 456 740	17 471 000	 0,00	19.e5 dxe5 20.Nxe5 Nh7 21.Qg3 Nf6 22.Qg5 Nh7
 21/62	00:15	 266 496 430	17 561 000	 0,00	19.e5 dxe5 20.Nxe5 Nh7 21.Qg3 Nf6 22.Qg5 Nh7
 22/62-	00:34	 591 085 996	17 726 000	-0,06	19.e5 dxe5
 22/62	00:38	 674 925 152	17 793 000	-0,03	19.e5 dxe5 20.Nxe5 Ncxd5 21.Nxd5 Nxd5 22.f6 Qb6+ 23.Kh1 Nxf6 24.Rf3 Be6 25.Re1 Rad8 26.Rg3 Ne8 27.Qh5 f5 28.Ng6 Rd7 29.Nxf8 Kxf8 30.Bxf5 Qf2 31.Rg1 Bf7 32.Bg6 Bxg6 33.Qxb5 Rd3 34.Rxg6 Nd6 35.Qg5 Bf6 36.Qg4 Kf7 37.Qh5 Rd2 38.Rg3+ Ke6 39.Rf3 Qh4 40.Re3+ Kd7
 23/71-	00:42	 766 026 050	18 141 000	-0,10	19.e5 dxe5
 23/71+	01:31	1 635 812 738	18 105 000	+0,02	19.Qh4
 23/73+	05:16	5 681 258 675	17 966 000	+0,46	19.Qh4
 23/74	11:45	12 666 795 645	17 962 000	+0,52	19.Qh4 Na6 20.g4 Qb6 21.Rae1 Rfb8 22.g5 Ne8 23.g6 Nf6 24.e5 dxe5 25.gxf7+ Kxf7 26.Nxe5+ Ke8 27.Qg5 Bf8 28.d6 Qc5 29.Qg3 Kd8 30.Ng6 Bh6 31.dxe7+ Kc8 32.Rf2 Bxe3 33.Qxe3 Qxe3 34.Rxe3 Kc7 35.Rd2 Rg8 36.a4 Rab8 37.Rd4 Nc5 38.Re5
 24/76-	14:16	15 455 514 675	18 055 000	+0,46	19.Qh4 Na6
 24/76	14:26	15 629 815 018	18 062 000	+0,46	19.Qh4 Nh7 20.f6 Bxf6 21.Qh5 Bg7 22.e5 f5 23.Nxf5 Bxf5 24.Bxf5 Rxf5 25.Qxf5 dxe5 26.Nxe5 Qxd5 27.Ng6 Re8 28.Rae1 Bf6 29.Ne5 Bg7 30.Qg6 Rf8 31.Ng4 Kh8 32.Ne3 Qc5 33.Rf5 Rxf5 34.Qxf5 Be5 35.Qh5 Ne6 36.Kh1 Ng7 37.Qh6 Kg8 38.Rf1
 25/76+	17:25	18 984 154 631	18 165 000	+0,52	19.Qh4
 25/76	21:57	24 034 601 825	18 246 000	+0,56	19.Qh4 Nh7 20.f6 Bxf6 21.Qh5 Bg7 22.e5 f5 23.Nxf5 Bxf5 24.Bxf5 Rxf5 25.Qxf5 dxe5 26.Nxe5 Qxd5 27.Ng6 Re8 28.Rae1 Bf6 29.Ne5 Bg7 30.Qg6 Rf8 31.Ng4 Kh8 32.Ne3 Qc5 33.Rf5 Rxf5 34.Qxf5 Be5 35.Kh1 e6 36.Qh5 Bd6 37.Qxc5 Bxc5
 26/76+	38:47	43 026 742 939	18 487 000	+0,63	19.Qh4
 26/76+	1:04:20	71 719 583 226	18 581 000	+0,81	19.Qh4
 26/77	1:41:49	113 943 779 032	18 651 000	+0,93	19.Qh4 Nh7 20.f6 exf6 21.e5 f5 22.Qg3 Ne8 23.Bxf5 Bxf5 24.Nxf5 Kh8 25.exd6 Qf6 26.N3d4 Qg6 27.Nxb5 Qxg3 28.hxg3 Rd8 29.Nxa7 Nxd6 30.Nc6 Rd7 31.a4 Nf6 32.Ne5 Rdd8 33.Rad1 Nfe4 34.Nc6 Rd7 35.a5 Ra8
 27/77-	1:42:15	114 505 301 894	18 664 000	+0,84	19.Qh4 Nh7
 27/77	1:42:39	114 970 514 766	18 669 000	+0,84	19.Qh4 Nh7 20.f6 exf6 21.e5 f5 22.Qg3 dxe5 23.Nxe5 Bc8 24.Nc6 Qg5 25.Qxg5 Nxg5 26.d6 Ne8 27.Ne7+ Kh8 28.Nxc8 Rxc8 29.Rxf5 Nh7 30.d7 Rd8 31.dxe8Q Rfxe8 32.Nf1 Re2 33.Rf2 Rxf2 34.Kxf2 b4 35.Rd1 Rb8 36.cxb4 Bxb2 37.Ne3 Rxb4 38.Rd8+ Kg7 39.h4 Nf8 40.Nf5+ Kg8 41.Rc8 Bc3 42.Ne3 Bd4 43.a3 Rb2 44.Rxc4 Ne6 45.Kf3 Ra2 46.a4 Ra3 47.Rc8+ Kg7
Best move: Qh4, Value: +0,84, Depth: 27/77, Time: 1:42:39,064, 114 970 514 766 Nodes, 18 669 kN/sec.
Top
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test position: Very tough and just tough

Post by zullil »

Some more:

Code: Select all

32     +1.54   51:52   23327M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 Ne8 Ne7+ Kh8 Nxc8 Rxc8 Rxf5 Nxd6 
                              Rxg5 Rfe8 Kf2 Re6 Nf5 Bf6 Rh5+ Kg8 Rd1 Nxf5 Bxf5 
                              Re5 Rd6 Be7 Rd7 Bc5+ Kg3 Rce8 h4 a6 Kg4 a5 
33     +1.62 1:00:08   27169M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 Ne8 Ne7+ Kh8 Nxc8 Rxc8 Rxf5 Nxd6 
                              Rxg5 Rfe8 Kf2 Re6 Nd5 Rce8 Rh5+ Kg8 Nf4 R6e7 Rb1 
                              Ne4+ Bxe4 Rxe4 g3 a6 h4 Be5 Nd5 Bg7 Kf3 Re2 Rg5 
34  <  +1.49 1:06:51   30410M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 
34  <  +1.37 1:08:10   30989M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 
34     +1.49 1:14:24   33821M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 Ne8 Ne7+ Kh8 Nxc8 Rxc8 Rxf5 Nxd6 
                              Rxg5 Rfe8 Kf2 Re6 Nd5 Rce8 Rh5+ Kg8 Nf4 R6e7 Kf1 
                              Re5 Rd1 Rxh5 Nxh5 Be5 g3 Rd8 Ke2 b4 Rd5 
35     +1.54 1:40:36   45970M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 Ne8 Ne7+ Kh8 Nxc8 Rxc8 Rxf5 Nxd6 
                              Rxg5 Rfe8 Kf2 Re6 Nd5 Rce8 Rh5+ Kg8 Nf4 R6e7 Kf1 
                              Re5 Rd1 Rxh5 Nxh5 Be5 g3 Rd8 Ke2 b4 Rd5 Re8 
36  <  +1.41 1:59:54   55387M Qh4 Nh7 f6 exf6 e5 f5 
36  <  +1.29 2:01:41   56194M Qh4 Nh7 f6 exf6 e5 f5 
36     +1.49 2:23:51   66481M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 Ne7+ Kh8 d6 Ne8 Nxc8 Rxc8 Rxf5 Nh7 d7 
                              Rd8 dxe8=Q Rfxe8 Nf1 Re2 Rf2 Rxf2 Kxf2 b4 Rd1 
                              Rxd1 Bxd1 bxc3 bxc3 Bxc3 Ne3 Bd4 Ke2 Be5 g3 c3 
                              Kd3 Kg7 Nf5+ Kf6 Nd4 Bc7 Nb5 Bb6 
37  >  +1.58 3:30:52   98077M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 
37  >  +1.66 4:34:08  127327M Qh4 
37  <  +1.41 4:39:14  129623M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 
37     +1.54 4:56:04  137392M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 Re8 Nxf5 Nd5 Rad1 Bxf5 Rxf5 Ne3 d7 
                              Nxd1 dxe8=Q+ Rxe8 Bxd1 a6 Nb4 Re1+ Rf1 Re6 h4 Ne4 
                              Bf3 Nd2
Top
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test position: Very tough and just tough

Post by zullil »

More:

Code: Select all

38  >  +1.62 6:21:02  177124M Qh4 Nh7 f6 exf6 e5 f5 
38  >  +1.70 8:51:31  247712M Qh4 Nh7 f6 exf6 e5 
38  <  +1.45 9:22:49  262551M Qh4 Nh7 f6 exf6 e5 f5 
38  <  +1.37 9:48:14  274315M Qh4 Nh7 f6 exf6 
38     +1.66 10:54:28  305785M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 Ne8 Nxf5 Bd7 Nfe7+ Kh8 Rad1 Bf6 h4 
                              Bxc6 Nxc6 Ne6 d7 Bxh4 dxe8=Q Raxe8 Rd5 Bg3 Rxb5 
                              Nf4 Bd1 Rg8 Nd4 Re1 Rxe1 Bxe1 Bf3 Bd2 Nf5 Rg6 
                              Rb8+ Kh7 Rb7 Re6 Rd7 
39  <  +1.49 12:10:23  343272M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 
39  <  +1.33 12:21:11  348323M Qh4 Nh7 f6 exf6 e5 f5 
39     +1.58 13:42:37  386721M Qh4 Nh7 f6 exf6 e5 f5 Qg3 dxe5 Nxe5 Bc8 Nc6 Qg5 
                              Qxg5 Nxg5 d6 Ne8 Nxf5 Bd7 Nfe7+ Kh8 Rad1 Bf6 h4 
                              Bxc6 Nxc6 Ne6 d7 Bxh4 dxe8=Q Raxe8 Rd5 Bg3 Rxb5 
                              Nf4 Bd1 Rg8 Nd4 Rg6 Nf5 Ne2+ Bxe2 Rxe2 Nxg3 Rxg3 
                              Rf2 Re7 Rd5 Rg6
Top
User avatar
Eelco de Groot
Posts: 4708
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test position: Very tough and just tough

Post by Eelco de Groot »

Martin Thoresen wrote:Here's 1 hour and 42 minutes with Houdini on the TCEC computer, 8 GB hash with Large Pages:

[d]

Code: Select all

Houdini 1.5a t6:
  4/17	00:00	       1 870	0	-0,88	19.b3 Rc8 20.bxc4 bxc4 21.Rab1
  5/17	00:00	       2 794	0	-0,88	19.b3 Rc8 20.Nd4 Na6 21.bxc4 bxc4
  5/17	00:00	       4 060	253 000	-0,86	19.a4 a6 20.Nd4 Qe8 21.axb5 axb5
  6/17	00:00	       5 296	331 000	-0,75	19.a4 a6 20.Nd4 Qe8 21.Rf3 Qc8 22.Nc6
  7/17	00:00	       6 611	413 000	-0,70	19.a4 a6 20.Nd4 Qe8 21.Rf3 Nh7 22.Qh4
  8/18+	00:00	       9 858	616 000	-0,61	19.a4
  8/19	00:00	      16 901	1 056 000	-0,51	19.a4 a6 20.Nd4 Be8 21.Nc6 Bxc6 22.dxc6 Qe8 23.axb5 axb5 24.Rxa8 Qxa8
  9/25	00:00	      92 293	2 251 000	-0,54	19.a4 bxa4 20.Nd2 Rb8 21.Ndxc4 Rb7 22.Qg3 Bb5 23.h4 Qd7
 10/27-	00:00	     153 781	3 271 000	-0,61	19.a4 bxa4
 10/27	00:00	     191 501	3 419 000	-0,54	19.a4 b4 20.Nxc4 bxc3 21.bxc3 Rc8 22.Ne3 Na6 23.e5 dxe5 24.Nxe5 Rxc3 25.Rab1
 11/27-	00:00	     218 054	3 634 000	-0,61	19.a4 b4
 11/29	00:00	     691 536	6 649 000	-0,55	19.a4 Qb8 20.Nd4 bxa4 21.Nxc4 Bb5 22.Nxb5 Qxb5 23.Rxa4 Nxe4 24.Qxe7 Qc5+ 25.Kh1 Nf2+ 26.Kg1 Nd3+ 27.Kh1 Nxd5 28.Qxd6 Qxd6 29.Nxd6 Nxb2
 12/29	00:00	     778 424	6 768 000	-0,55	19.a4 Qb8 20.Nd4 bxa4 21.Nxc4 Bb5 22.Nxb5 Qxb5 23.Rxa4 Nxe4 24.Qxe7 Qc5+ 25.Kh1 Nf2+ 26.Kg1 Nd3+ 27.Kh1 Nxd5 28.Qxd6 Qxd6 29.Nxd6 Nxb2
 13/29+	00:00	   1 149 285	7 765 000	-0,48	19.a4
 13/35	00:00	   2 038 986	9 617 000	-0,57	19.a4 b4 20.Nxc4 bxc3 21.bxc3 Qc8 22.Ne3 Na6 23.e5 dxe5 24.Nxe5 Qxc3 25.Nxd7 Nxd7 26.Rab1 Rfe8 27.Rb3 Qd2 28.Bd3
 14/35+	00:00	   2 521 801	9 967 000	-0,51	19.a4
 14/35	00:00	   2 874 462	10 121 000	-0,49	19.a4 b4 20.Nxc4 Qc8 21.Nfd2 bxc3 22.bxc3 Rb8 23.Rf3 Rd8 24.Rg3 Nce8 25.Qe3 Qc7 26.Qd4 Kf8 27.e5
 15/35	00:01	   4 455 096	11 336 000	-0,47	19.a4 b4 20.Nxc4 Qc8 21.Nfd2 bxc3 22.bxc3 Rb8 23.Qe3 a5 24.Rab1 Qa6 25.h3 Rfe8 26.Nb6 Kf8 27.Bd3
 16/35-	00:01	   5 358 110	11 750 000	-0,54	19.a4 b4
 16/41	00:01	   9 659 166	13 359 000	-0,54	19.a4 b4 20.Nxc4 Qc8 21.Nfd2 bxc3 22.bxc3 Rb8 23.Rad1 Rd8 24.h4 Kf8 25.h5 Ng8 26.Qe3 Bh6 27.Qxa7 Nf6 28.Qd4 Qa6 29.Rb1 Bxa4 30.Bxa4 Qxa4
 16/46	00:01	  17 081 335	14 562 000	-0,53	19.e5 dxe5 20.Nxe5 Nce8 21.Rf3 Qc7 22.Nxd7 Qxd7 23.a4 b4 24.cxb4 Qd6 25.Nxc4 Qxb4 26.Ne3 Qxb2 27.Rb1 Qd4 28.Rd1 Qc5 29.Rg3 Rc8 30.Qh4
 17/46+	00:02	  22 688 056	14 770 000	-0,46	19.e5
 17/46	00:02	  24 897 213	14 810 000	-0,45	19.e5 dxe5 20.Nxe5 Nce8 21.Rf3 Qc7 22.Nxd7 Qxd7 23.Rg3 a6 24.Re1 Qc7 25.a4 Qe5 26.Rd1 Rd8 27.Bb1 Qd6 28.Kh1 Qb6 29.axb5 axb5
 18/46+	00:02	  29 234 829	14 953 000	-0,39	19.e5
 18/48+	00:03	  45 345 941	15 609 000	-0,25	19.e5
 18/51	00:06	  92 364 181	16 426 000	-0,10	19.e5 dxe5 20.Nxe5 Nce8 21.Rf3 Nh7 22.Qh4 f6 23.Nc6 Bxc6 24.dxc6 Ng5 25.Rg3 Qb6 26.Qf4 Rd8 27.a4 Rd2 28.h4 Nf7 29.Be4 bxa4 30.Rxa4 Ne5 31.Rb4
 19/51+	00:08	 129 397 958	16 739 000	-0,04	19.e5
 19/51	00:10	 164 684 623	16 838 000	 0,00	19.e5 dxe5 20.Nxe5 Nce8 21.Rf3 Nh7 22.Qh4 f6 23.Nxd7 Qxd7 24.Rg3 Ng5 25.a4 Nd6 26.Qf4 Ngf7 27.Qg4 Ne8 28.Qd4 Ne5 29.Ng4 Nxg4 30.Rxg4 Nd6 31.Rxg7+ Kxg7 32.Qg4+ Kh8 33.Qh3+ Kg8 34.Qg3+ Kh8 35.Qh3+ Kg8
 20/62	00:14	 245 456 740	17 471 000	 0,00	19.e5 dxe5 20.Nxe5 Nh7 21.Qg3 Nf6 22.Qg5 Nh7
 21/62	00:15	 266 496 430	17 561 000	 0,00	19.e5 dxe5 20.Nxe5 Nh7 21.Qg3 Nf6 22.Qg5 Nh7
 22/62-	00:34	 591 085 996	17 726 000	-0,06	19.e5 dxe5
 22/62	00:38	 674 925 152	17 793 000	-0,03	19.e5 dxe5 20.Nxe5 Ncxd5 21.Nxd5 Nxd5 22.f6 Qb6+ 23.Kh1 Nxf6 24.Rf3 Be6 25.Re1 Rad8 26.Rg3 Ne8 27.Qh5 f5 28.Ng6 Rd7 29.Nxf8 Kxf8 30.Bxf5 Qf2 31.Rg1 Bf7 32.Bg6 Bxg6 33.Qxb5 Rd3 34.Rxg6 Nd6 35.Qg5 Bf6 36.Qg4 Kf7 37.Qh5 Rd2 38.Rg3+ Ke6 39.Rf3 Qh4 40.Re3+ Kd7
 23/71-	00:42	 766 026 050	18 141 000	-0,10	19.e5 dxe5
 23/71+	01:31	1 635 812 738	18 105 000	+0,02	19.Qh4
 23/73+	05:16	5 681 258 675	17 966 000	+0,46	19.Qh4
 23/74	11:45	12 666 795 645	17 962 000	+0,52	19.Qh4 Na6 20.g4 Qb6 21.Rae1 Rfb8 22.g5 Ne8 23.g6 Nf6 24.e5 dxe5 25.gxf7+ Kxf7 26.Nxe5+ Ke8 27.Qg5 Bf8 28.d6 Qc5 29.Qg3 Kd8 30.Ng6 Bh6 31.dxe7+ Kc8 32.Rf2 Bxe3 33.Qxe3 Qxe3 34.Rxe3 Kc7 35.Rd2 Rg8 36.a4 Rab8 37.Rd4 Nc5 38.Re5
 24/76-	14:16	15 455 514 675	18 055 000	+0,46	19.Qh4 Na6
 24/76	14:26	15 629 815 018	18 062 000	+0,46	19.Qh4 Nh7 20.f6 Bxf6 21.Qh5 Bg7 22.e5 f5 23.Nxf5 Bxf5 24.Bxf5 Rxf5 25.Qxf5 dxe5 26.Nxe5 Qxd5 27.Ng6 Re8 28.Rae1 Bf6 29.Ne5 Bg7 30.Qg6 Rf8 31.Ng4 Kh8 32.Ne3 Qc5 33.Rf5 Rxf5 34.Qxf5 Be5 35.Qh5 Ne6 36.Kh1 Ng7 37.Qh6 Kg8 38.Rf1
 25/76+	17:25	18 984 154 631	18 165 000	+0,52	19.Qh4
 25/76	21:57	24 034 601 825	18 246 000	+0,56	19.Qh4 Nh7 20.f6 Bxf6 21.Qh5 Bg7 22.e5 f5 23.Nxf5 Bxf5 24.Bxf5 Rxf5 25.Qxf5 dxe5 26.Nxe5 Qxd5 27.Ng6 Re8 28.Rae1 Bf6 29.Ne5 Bg7 30.Qg6 Rf8 31.Ng4 Kh8 32.Ne3 Qc5 33.Rf5 Rxf5 34.Qxf5 Be5 35.Kh1 e6 36.Qh5 Bd6 37.Qxc5 Bxc5
 26/76+	38:47	43 026 742 939	18 487 000	+0,63	19.Qh4
 26/76+	1:04:20	71 719 583 226	18 581 000	+0,81	19.Qh4
 26/77	1:41:49	113 943 779 032	18 651 000	+0,93	19.Qh4 Nh7 20.f6 exf6 21.e5 f5 22.Qg3 Ne8 23.Bxf5 Bxf5 24.Nxf5 Kh8 25.exd6 Qf6 26.N3d4 Qg6 27.Nxb5 Qxg3 28.hxg3 Rd8 29.Nxa7 Nxd6 30.Nc6 Rd7 31.a4 Nf6 32.Ne5 Rdd8 33.Rad1 Nfe4 34.Nc6 Rd7 35.a5 Ra8
 27/77-	1:42:15	114 505 301 894	18 664 000	+0,84	19.Qh4 Nh7
 27/77	1:42:39	114 970 514 766	18 669 000	+0,84	19.Qh4 Nh7 20.f6 exf6 21.e5 f5 22.Qg3 dxe5 23.Nxe5 Bc8 24.Nc6 Qg5 25.Qxg5 Nxg5 26.d6 Ne8 27.Ne7+ Kh8 28.Nxc8 Rxc8 29.Rxf5 Nh7 30.d7 Rd8 31.dxe8Q Rfxe8 32.Nf1 Re2 33.Rf2 Rxf2 34.Kxf2 b4 35.Rd1 Rb8 36.cxb4 Bxb2 37.Ne3 Rxb4 38.Rd8+ Kg7 39.h4 Nf8 40.Nf5+ Kg8 41.Rc8 Bc3 42.Ne3 Bd4 43.a3 Rb2 44.Rxc4 Ne6 45.Kf3 Ra2 46.a4 Ra3 47.Rc8+ Kg7
Best move: Qh4, Value: +0,84, Depth: 27/77, Time: 1:42:39,064, 114 970 514 766 Nodes, 18 669 kN/sec.
Thanks a lot Martin and Louis! Wow, even the TCEC computer has stopped playing games and the TCEC rating lists will now be delayed. The Washington Post can't publish a new article on Houdini because of this, and goes broke. This starts the final collapse of the US economy, looting and arson in the big cities in the North, China invades Taiwan and Japan in the following turmoil, to protect vital interests in their influence zone, uprising in Tibet and Mongolia ensues, all this because of a single chess position. It better be worth it...

I have not yet managed to improve my own results, the latest Multi PV run went to

r2q1rk1/p1nbppb1/3p1n2/1p1P1PQ1/2p1P3/2P1NN2/PPB3PP/R4RK1 w - -

Engine: Rainbow Serpent 2.0 Build 113 (Athlon 2009 MHz, 256 MB)
by Romstad, Costalba, Kiiski

26 419:02 -0.34 1.Nd4 Nh7 2.Qg3 Ne8 3.a4 Kh8 4.axb5 Qb6
5.Ra6 Qb7 6.Qh4 (11.154.230.875) 443

26 419:02 -0.72 1.Kh1 a5 2.Qh4 a4 3.Ng5 a3 4.Ng4 Ncxd5
5.bxa3 (11.154.230.875) 443

so I don't think this is better...

Thanks guys!
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
Top

Return to “Computer Chess Club: General Topics”