a hard test position for computers that I composed

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zullil
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Full name: Louis Zulli

Re: a hard test position for computers that I composed

Post by zullil » Fri Jan 14, 2011 1:29 pm

George Tsavdaris wrote: I wonder how difficult is to program engines for a primitive kind of planning like that Uri has shown. Primitive because it's simple and straightforward.
and wrong! :shock:

zullil
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Re: a hard test position for computers that I composed

Post by zullil » Fri Jan 14, 2011 2:31 pm

Which engines find mate-in-20?

[D]1kb5/1p1pN1K1/pP1P4/P7/8/8/8/3b4 w - - 17 9

zullil
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Re: a hard test position for computers that I composed

Post by zullil » Fri Jan 14, 2011 2:39 pm

zullil wrote:Which engines find mate-in-20?

[D]1kb5/1p1pN1K1/pP1P4/P7/8/8/8/3b4 w - - 17 9
Stockfish-2.0.1 (8 threads) does:

Code: Select all

Searching: 1kb5/1p1pN1K1/pP1P4/P7/8/8/8/3b4 w - -
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0
 1     -4.12   00:01       30 Kf6 
 2     -4.16   00:01       58 Kf6 Bf3 
 3     -4.00   00:01      142 Kf6 Bf3 Ke5 
 4     -4.00   00:01      324 Kf6 Bb3 Ke5 Bc4 
 5     -4.04   00:01      494 Kf6 Bb3 Ke5 Bc4 Nxc8 Kxc8 
 6  >  -3.96   00:01      704 Kf6 Bb3 Ke5 Bc4 Nd5 
 6  >  -3.88   00:01      815 Kf6 Bb3 Ke5 Bc4 Nd5 
 6     -3.92   00:01     1089 Kf6 Bc2 Ke5 Bb3 Kd4 Be6 
 7     -3.96   00:01     1419 Kf6 Bc2 Ke5 Bb3 Kd4 Be6 Nxc8 Kxc8 
 8  >  -3.84   00:01     1981 Kf6 Bc2 Ke5 Bb3 Kd4 Be6 Nd5 
 8     -3.84   00:01     3459 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Nf6 Bc4 
 9     -3.76   00:01     4097 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Nf6 Bb3 Kd4 Be6 
10     -3.76   00:01     5245 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Ke5 Bc2 Nf6 
11  >  -3.68   00:01     8768 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Ke5 Bc2 Kd4 
11     -3.68   00:01     9376 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bb3 
                              Kd4 Be6 Nd5 Bg4 Nf6 Be6 
12  <  -3.76   00&#58;01    11688 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bb3 
                              Kd4 Be6 Nd5 Bg4 Ke5 Bf3 Ne7 Bh5 Nd5 Be2 Ne7 Bf3 
                              Nd5 Be2 
12     -3.68   00&#58;01    13201 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bb3 
                              Kd4 Be6 Nd5 Bf5 Nf6 Be6 
13  <  -3.76   00&#58;01    13863 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bb3 
                              Kd4 Be6 Nd5 Bf5 Nf6 Bc2 
13     -3.76   00&#58;01    14999 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bb3 
                              Kd4 Be6 Nd5 Bf5 Nf6 Bc2 
14  >  -3.68   00&#58;01    15848 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bb3 
                              Nd5 Bc4 Kd4 Bb3 Ne7 Be6 Nd5 Bf5 Nf6 Bc2 
14     -3.76   00&#58;01    21356 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bb3 
                              Kd4 Be6 Nd5 Bf5 Ne7 Be6 Ng6 Bg4 Ne5 Be6 Ke4 
15     -3.76   00&#58;01    24163 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bd1 
                              Ke4 Be2 Ke5 Bf3 Kd4 
16  >  -3.68   00&#58;01    29542 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bd1 
                              Ke4 Be2 Kd5 
16     -3.68   00&#58;01    31609 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Kd4 Bg6 Nf6 Bc2 Ke5 Bd1 
                              Nd5 Be2 Ne7 Bh5 Nd5 Bg6 Nf6 Bc2 Nd5 Bd3 Ne7 Bc4 
                              Nd5 Bd3 
17     -3.72   00&#58;01    59960 Kf6 Bb3 Ke5 Be6 Nd5 Bf7 Ne7 Be6 
17  >  -3.60   00&#58;01    66485 Kf8 Bf3 Ke8 Bg2 Kd8 
17  >  -3.52   00&#58;01    69539 Kf8 Bf3 Ke8 Bg2 Kd8 
17  >  -3.35   00&#58;01    71996 Kf8 Bh5 Kg8 Bf3 Kf8 Be4 Ke8 
17  >  -3.02   00&#58;01    73963 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
17  >  -2.38   00&#58;01    75922 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
17  >  -1.09   00&#58;01    78563 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
17     +0.00   00&#58;01    86474 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
18     +0.00   00&#58;01    88313 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
19     +0.00   00&#58;01    91198 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
20     +0.00   00&#58;01    93346 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
21     +0.00   00&#58;01    95899 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
22     +0.00   00&#58;01    98927 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
23     +0.00   00&#58;01   104176 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
24     +0.00   00&#58;01   107948 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
25     +0.00   00&#58;01   113318 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
26     +0.00   00&#58;01   121738 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
27     +0.00   00&#58;01   131797 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
28     +0.00   00&#58;01   137045 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
29     +0.00   00&#58;01   148347 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
30     +0.00   00&#58;01   158492 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
31     +0.00   00&#58;01   168301 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
32     +0.00   00&#58;01   177865 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
33     +0.00   00&#58;01   192434 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
34     +0.00   00&#58;01   210787 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
35     +0.00   00&#58;01   230477 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
36     +0.00   00&#58;01   255378 Kf8 Bh5 Kg8 Be2 Kf8 Bh5 
36  >  +0.08   00&#58;01   412702 Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf3 
                              Nf6 
36  >  +0.16   00&#58;01   459761 Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 
36  >  +0.32   00&#58;01   561807 Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 
36  >  +0.65   00&#58;01   664420 Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 
36  >  +1.29   00&#58;01   879542 Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 
36  >  +2.59   00&#58;01    1107K Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 Ka8 Nxd7 Bh3 Ke8 
36  >  +5.17   00&#58;02    4592K Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 Ka8 Nxd7 Bh3 Ke8 Bf5 Ke7 Bh3 Ne5 
36  > +10.34   00&#58;02    4680K Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 Ka8 Nxd7 Bg6 Ke7 Bf5 Nf6 Kb8 d7 Bxd7 Kxd7 Ka8 
                              Ke7 Kb8 Ke8 Ka8 Nd5 Kb8 Kd8 Ka8 Ne7 Kb8 Kd7 Ka8 
                              Nc6 bxc6 Kc7 
36  > +20.69   00&#58;02    4742K Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 Ka8 Nxd7 Bg6 Ke7 Bf5 Nf6 Kb8 d7 Bxd7 Kxd7 Ka8 
                              Ke7 Kb8 Ke8 Ka8 Nd5 Kb8 Kd8 Ka8 Ne7 Kb8 Kd7 Ka8 
                              Nc6 bxc6 Kc7 
36  > +41.37   00&#58;02    4968K Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 Ka8 Nxd7 Bg6 Ke7 Bf5 Nf6 Kb8 d7 Bxd7 Kxd7 Ka8 
                              Ke7 Kb8 Ke8 Ka8 Nd5 Kb8 Kd8 Ka8 Ne7 Kb8 Kd7 Ka8 
                              Nc6 bxc6 Kc7 
36  > +82.75   00&#58;02    5000K Kf7 Bf3 Ke8 Bd1 Kd8 Bf3 Nxc8 Be2 Ne7 Bg4 Nd5 Bf5 
                              Nf6 Ka8 Nxd7 Bg6 Ke7 Bf5 Nf6 Kb8 d7 Bxd7 Kxd7 Ka8 
                              Ke7 Kb8 Ke8 Ka8 Nd5 Kb8 Kd8 Ka8 Ne7 Kb8 Kd7 Ka8 
                              Nc6 bxc6 Kc7 
36     +3.52   00&#58;05   18503K Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Ne7 Ka8 Nd5 Kb8 Nf6 Bf3 
                              Nxd7+ Kc8 Ke7 Bg2 Ne5 Bh3 Ke8 Be6 Ng6 Bd7+ Ke7 
                              Bh3 Ne5 Bf5 Nd3 Bd7 Kf6 Bg4 Kf7 Bd7 Nc5 Bf5 Ke7 
                              Bg4 Ke8 Bd7+ Kf7 
37  >  +7.03   00&#58;05   18841K Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Na7 Bg4 Ke7 Be6 Kd8 Bg4 
                              Nc8 Ka8 Ke8 Kb8 Ne7 Ka8 Nd5 Bf3 Nf6 Kb8 Nxd7+ Ka8 
                              Ne5 Be2 d7 Bb5 Ke7 Bxd7 Kxd7 Kb8 Kd8 Ka8 Nc6 bxc6 
                              Kc7 c5 b7+ Ka7 b8=Q# 
37  > +12.96   00&#58;05   18842K Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Na7 Bg4 Ke7 Be6 Kd8 Bg4 
                              Nc8 Ka8 Ke8 Kb8 Ne7 Ka8 Nd5 Bf3 Nf6 Kb8 Nxd7+ Ka8 
                              Ne5 Be2 d7 Bb5 Ke7 Bxd7 Kxd7 Kb8 Kd8 Ka8 Nc6 bxc6 
                              Kc7 c5 b7+ Ka7 b8=Q# 
37  > +17.63   00&#58;05   18843K Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Na7 Bg4 Ke7 Be6 Kd8 Bg4 
                              Nc8 Ka8 Ke8 Kb8 Ne7 Ka8 Nd5 Bf3 Nf6 Kb8 Nxd7+ Ka8 
                              Ne5 Be2 d7 Bb5 Ke7 Bxd7 Kxd7 Kb8 Kd8 Ka8 Nc6 bxc6 
                              Kc7 c5 b7+ Ka7 b8=Q# 
37  > +31.64   00&#58;05   18844K Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Na7 Bg4 Ke7 Be6 Kd8 Bg4 
                              Nc8 Ka8 Ke8 Kb8 Ne7 Ka8 Nd5 Bf3 Nf6 Kb8 Nxd7+ Ka8 
                              Ne5 Be2 d7 Bb5 Ke7 Bxd7 Kxd7 Kb8 Kd8 Ka8 Nc6 bxc6 
                              Kc7 c5 b7+ Ka7 b8=Q# 
37  > +82.75   00&#58;05   18844K Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Na7 Bg4 Ke7 Be6 Kd8 Bg4 
                              Nc8 Ka8 Ke8 Kb8 Ne7 Ka8 Nd5 Bf3 Nf6 Kb8 Nxd7+ Ka8 
                              Ne5 Be2 d7 Bb5 Ke7 Bxd7 Kxd7 Kb8 Kd8 Ka8 Nc6 bxc6 
                              Kc7 c5 b7+ Ka7 b8=Q# 
37  >    #22   00&#58;05   18845K Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Na7 Bg4 Ke7 Be6 Kd8 Bg4 
                              Nc8 Ka8 Ke8 Kb8 Ne7 Ka8 Nd5 Bf3 Nf6 Kb8 Nxd7+ Ka8 
                              Ne5 Be2 d7 Bb5 Ke7 Bxd7 Kxd7 Kb8 Kd8 Ka8 Nc6 bxc6 
                              Kc7 c5 b7+ Ka7 b8=Q# 
37       #20   00&#58;06   24629K Kf7 Bh5+ Kf8 Ka8 Nxc8 Kb8 Na7 Bg4 Ke7 Be6 Kd8 Bg4 
                              Nc8 Bh5 Ne7 Bf7 Kxd7 Bh5 Kd8 Be2 d7 Bb5 Ke8 Ba4 
                              Nc8 Bc6 Na7 Ba4 Ke7 Bxd7 Kxd7 Ka8 Nc6 bxc6 Kc7 c5 
                              b7+ Ka7 b8=Q# 

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F.Huber
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Re: a hard test position for computers that I composed

Post by F.Huber » Fri Jan 14, 2011 2:47 pm

Jouni wrote:Michael, how did You solve with Chest? My Chest is not solving (1. position) in 10 minutes by Autoturbo with any seach order :o
Hi Jouni,

if you look at ChestUCI's output you see that Michael has set fixed K2 manually before starting the search. ;)

Regards,
Franz

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Michael Diosi
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Re: a hard test position for computers that I composed

Post by Michael Diosi » Fri Jan 14, 2011 3:50 pm

Hi,


of course, I used my own intelligence :)


Michael
http://www.playwitharena.com

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F.Huber
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Re: a hard test position for computers that I composed

Post by F.Huber » Fri Jan 14, 2011 3:58 pm

Michael Diosi wrote: of course, I used my own intelligence :)
A so-called 'dual-brain' ... :mrgreen:

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Michael Diosi
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Re: a hard test position for computers that I composed

Post by Michael Diosi » Fri Jan 14, 2011 8:43 pm

zullil wrote:Which engines find mate-in-20?

[D]1kb5/1p1pN1K1/pP1P4/P7/8/8/8/3b4 w - - 17 9
Hi,


FEN: 1kb5/1p1pN1K1/pP1P4/P7/8/8/8/3b4 w - - 17 9

ChestUCI+Brain:
FEN: 1kb5/1p1pN1K1/pP1P4/P7/8/8/8/3b4 w - - (5+6)
Stellungs-Analyse: C0/R0/K2/P2/X8 W:2/14
AutoTurbo-Suche nach 1. Spezial-Matt [C1/R0/K2/P0/X0] in 50 (Hash=64MB)
AutoTurbo-Suche nach 1. Spezial-Matt [C0/R1/K2/P0/X0] in 50 (Hash=64MB)
AutoTurbo-Suche nach 1. Spezial-Matt [C0/R2/K2/P0/X0] in 50 (Hash=64MB)
AutoTurbo-Suche nach 1. Spezial-Matt [C0/R-2/K2/P0/X0] in 50 (Hash=64MB)
AutoTurbo-Suche nach 1. Spezial-Matt [C0/R3/K2/P0/X0] in 50 (Hash=64MB)
AutoTurbo-Suche nach 1. Spezial-Matt [C0/R-3/K2/P0/X0] in 50 (Hash=64MB)
AutoTurbo-Suche nach 1. Spezial-Matt [C0/R0/K2/P1/X0] in 50 (Hash=64MB)
AutoTurbo-Suche nach 1. Spezial-Matt [C0/R0/K2/P2/X0] in 50 (Hash=64MB)
20/50 00:11 3.794.730 420.142 +M20 9.Kg7-f7
20/20 00:11 4.057.716 411.533 +M20 9.Kg7-f7 Bd1-h5+ 10.Kf7-f8 Kb8-a8 11.Ne7xc8 Ka8-b8 12.Nc8-a7 Bh5-g4 13.Kf8-e8 Bg4-h3 14.Ke8-d8 Bh3-g4 15.Na7-c8 Bg4-h5 16.Nc8-e7 Bh5-f7 17.Ne7-f5 Bf7-g8 18.Nf5-d4 Bg8-f7 19.Nd4-f3 Bf7-g8 20.Nf3-e5 Bg8-e6 21.Ne5xd7+ Kb8-a8 22.Nd7-c5 Be6-d5 23.Kd8-c7 Bd5-e6 24.Nc5xb7 Be6-f5 25.Nb7-c5 Bf5-e4 26.d6-d7 Be4-f5 27.d7-d8Q+ Bf5-c8 28.Qd8xc8+
Matt in 20 gefunden ! (1. Lösung in 00:09)
20/20 00:11 4.057.716 411.533 +M20 9.Kg7-f7 Bd1-h5+ 10.Kf7-f8 Kb8-a8 11.Ne7xc8 Ka8-b8 12.Nc8-a7 Bh5-g4 13.Kf8-e8 Bg4-h3 14.Ke8-d8 Bh3-g4 15.Na7-c8 Bg4-h5 16.Nc8-e7 Bh5-f7 17.Ne7-f5 Bf7-g8 18.Nf5-d4 Bg8-f7 19.Nd4-f3 Bf7-g8 20.Nf3-e5 Bg8-e6 21.Ne5xd7+ Kb8-a8 22.Nd7-c5 Be6-d5 23.Kd8-c7 Bd5-e6 24.Nc5xb7 Be6-f5 25.Nb7-c5 Bf5-e4 26.d6-d7 Be4-f5 27.d7-d8Q+ Bf5-c8 28.Qd8xc8+


Michael
http://www.playwitharena.com

Jouni
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Re: a hard test position for computers that I composed

Post by Jouni » Fri Jan 14, 2011 9:45 pm

OK I see - finally dual version of Chest :)

Jouni

Carlos Ylich
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Re: a hard test position for computers that I composed

Post by Carlos Ylich » Sat Jan 15, 2011 12:41 am

Nueva partida
k1b5/1p1p4/p1bP4/PP6/8/6N1/8/K7 w - - 0 1

Analysis by Zappa Mexico II x64:

1.b6 Af3 2.Rb2 Ag4 3.Rc3 Rb8 4.Rd3 Ae6 5.Rd4 Ah3 6.Ch5 Ag4 7.Cf4 Ad1 8.Re5 Ac2 9.Rf6 Ae4 10.Rg7 Ac2 11.Rf7 Ab1 12.Re8 Aa2 13.Cg6 Ra8 14.Rd8 Ac4 15.Ce7 Rb8 16.Cxc8 Ae6 17.Ce7 Af7 18.Rxd7 Ah5 19.Rd8 Ae2 20.d7 Ab5 21.Cc8 Aa4 22.Re7 Axd7 23.Rxd7 Ra8 24.Rd8 Rb8 25.Ce7 Ra8 26.Cc6 bxc6 27.Rc8 c5 28.b7+ Ra7 29.b8D#
+- (5.14) Profundidad: 31/1 00:00:00 0kN
1.b6 Af3 2.Rb2 Ag4 3.Rc3 Rb8 4.Rd3 Ae6 5.Rd4 Ah3 6.Ch5 Ag4 7.Cf4 Ad1 8.Re5 Ac2 9.Rf6 Ae4 10.Rg7 Ac2 11.Rf7 Ab1 12.Re8 Aa2 13.Cg6 Ra8 14.Rd8 Ac4 15.Ce7 Rb8 16.Cxc8 Ae6 17.Ce7 Af7 18.Rxd7 Ah5 19.Rd8 Ae2 20.d7 Ab5 21.Cc8 Aa4 22.Re7 Axd7 23.Rxd7 Ra8 24.Rd8 Rb8 25.Ce7 Ra8 26.Cc6 bxc6 27.Rc8 c5 28.b7+ Ra7 29.b8D#
+- (5.14) Profundidad: 31/72 00:00:10 44910kN, tb=16634
1.b6 Af3 2.Rb2 Ag4 3.Rc3 Rb8 4.Rd3 Ae6 5.Rd4 Ah3 6.Ch5 Ag4 7.Cf4 Ad1 8.Re5 Ac2 9.Rf6 Ae4 10.Rg7 Ra8 11.Rf8 Rb8 12.Rf7 Ah1 13.Cg6 Ad5+ 14.Re8 Aa2 15.Ce7 Ra8 16.Cxc8 Ae6 17.Rd8 Rb8 18.Ce7 Af7 19.Rxd7 Ah5 20.Rd8 Ae2 21.d7 Ab5 22.Cc8 Aa4 23.Re7 Axd7 24.Rxd7 Ra8 25.Rd8 Rb8 26.Ce7 Ra8 27.Cc6 bxc6 28.Rc8 c5 29.b7+ Ra7 30.b8D#
+- (5.14) Profundidad: 32/72 00:00:16 74959kN, tb=16643
1.b6 Af3 2.Rb2 Ag4 3.Rc3 Rb8 4.Rd3 Ae6 5.Rd4 Ah3 6.Ch5 Ag4 7.Cf4 Ad1 8.Re5 Ac2 9.Rf6 Ae4 10.Rg7 Ra8 11.Rf8 Rb8 12.Rf7 Ah1 13.Cg6 Ad5+ 14.Re8 Aa2 15.Ce7 Ra8 16.Cxc8 Ae6 17.Rd8 Rb8 18.Ce7 Af7 19.Rxd7 Ah5 20.Rd8 Ae2 21.d7 Ab5 22.Cc8 Aa4 23.Re7 Axd7 24.Rxd7 Ra8 25.Rd8 Rb8 26.Ce7 Ra8 27.Cc6 bxc6
+- (5.14) Profundidad: 32/72 00:00:58 274mN, tb=59411
1.b6 Af3 2.Rb2 Ag4 3.Rc3 Rb8 4.Rd3 Ae6 5.Ce2 Af5+ 6.Rd4 Ah7 7.Cf4 Ag8 8.Re5 Ah7 9.Rf6 Ae4 10.Re7 Ra8 11.Rf8 Rb8 12.Rf7 Ah1 13.Cg6 Ad5+ 14.Re8 Aa2 15.Ce7 Ra8 16.Cxc8 Ae6 17.Rd8 Rb8 18.Ce7 Af7 19.Rxd7 Ah5 20.Rd8 Ae2 21.d7 Ab5 22.Cc8 Aa4 23.Re7 Axd7 24.Rxd7 Ra8 25.Rd8 Rb8 26.Ce7 Ra8 27.Cc6 bxc6
+- (11.13) Profundidad: 33/72 00:01:14 379mN, tb=59412


:shock:

Dave Mitchell
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Re: a hard test position for computers that I composed

Post by Dave Mitchell » Sat Jan 15, 2011 3:17 am

Since the position is illegal, I believe there is a correction needed.

[D]k1b5/1p1p4/p1bP4/PP6/8/6N1/8/K7 w - - 0 1 bm b6



???

George Tsavdaris wrote:
I wonder how difficult is to program engines for a primitive kind of planning like that Uri has shown. Primitive because it's simple and straightforward.
That was tried for several years, but found wanting. Indeed, AI was seen by many as the superstar of the future for chess programs.

The programs were successful only on some types of positions, but really stupid about others. Despite repeated efforts by talented researchers and programmers, it failed time after time, in OTB play.

We aren't using alpha-beta and exhaustive searches because we like it. We're using them because everything else, has fallen far short of it.
Last edited by Dave Mitchell on Sat Jan 15, 2011 3:27 am, edited 1 time in total.

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