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Subject: Re: Strength question

Author: Omid David Tabibi

Date: 05:52:17 01/06/03

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On January 06, 2003 at 08:45:26, Uri Blass wrote:

>On January 06, 2003 at 08:01:53, Steve Maughan wrote:
>
>>Bruce,
>>
>>A couple of points:
>>
>>1) I think the idea of a machine searching "millions of positions per second" is
>>one of the first aspects of computer chess that intrigues people and draws them
>>into the field.  They therefore want to create a programs that is as fast as
>>possible (not necessarily as strong as possible - that's really tough!).
>>
>>2) I think there is a bit of programmer envy when you see Goliath searching 2
>>million nps or even Ruffian searching 800 knps.
>
>
>No reason to be envy because Goliath does not search the important nodes
>
>Here is the proof
>The following position is from a blitz game between goliath and movei.
>
>I expect every strong human to see the threat of black even at blitz but goliath
>did not see the threat and needs a long time to avoid a tactical error.
>

Goliath might be using too aggressive forward pruning methods. Nevertheless, its
NPS speed is impressive.


>[D]k2r4/1p4Rp/p1n2p2/8/2P5/5P2/Pq4PP/1B4QK w - - 0 30
>
>Goliath played the horrible blunder Rf7
>
>9 131 1065 5995034 g7f7 b2e2 b1h7 is from the logfile.
>
>You can see that goliath searched almost 6 million nodes but could not see
>simple tactics.
>
>The following is copied from a logfile that I got by email when goliath got the
>position for analysis
>
>WinBoard 4.0.5 + lg2000v35.exe
>StartChildProcess (dir="c:/lg2000v35") lg2000v35.exe
>270 >first : xboard
>270 >first : new
>random
>270 >first : level 0 5 0
>270 >first : post
>270 >first : hard
>27900 >first : force
>27900 >first : edit
>27900 >first : #
>27900 >first : Rg7
>27900 >first : Pc4
>27900 >first : Pf3
>27900 >first : Pa2
>27900 >first : Pg2
>27900 >first : Ph2
>27900 >first : Bb1
>27900 >first : Qg1
>27900 >first : Kh1
>27900 >first : c
>27900 >first : Ka8
>27900 >first : Rd8
>27900 >first : Pb7
>27900 >first : Ph7
>27900 >first : Pa6
>27900 >first : Nc6
>27900 >first : Pf6
>27900 >first : Qb2
>27900 >first : .
>34600 >first : analyze
>34710 <first : 6 207 4 7472 g7h7 d8d2 h2h4
>34760 <first : 6 182 4 15952 g7h7 b2e2 b1e4 e2c4
>34820 <first : 7 182 15 43436 g7h7 b2e2 b1e4 e2c4
>34870 <first : 7 207 17 62636 g7h7 b2e2 h2h4 e2c4 g1e3
>34930 <first : 8 207 25 78708 g7h7 b2e2 h2h4 e2c4 g1e3
>34980 <first : 8 177 30 114162 g7h7 b2e2 h2h4 e2c4 g1e3
>35040 <first : 8 152 32 148478 g7h7 b2e2 h7g7 e2c4 b1e4 d8d2
>36250 <first : 9 152 160 748852 g7h7 b2e2 h7g7 e2c4 b1e4 d8d2
>36410 <first : 9 120 170 838686 g7h7 b2e2 h7g7 e2c4 b1e4 d8d2
>36690 >first : .
>36740 <first : stat01: 211 1000482 9 34 35
>36800 <first : 9 -244 211 1011524 g7h7 b2e2 b1d3 e2d3 h7h4 d3e2 a2a4
>36850 <first : 9 -233 217 1050800 b1f5
>37840 <first : 9 15 316 1430882 b1f5 b2e2 g7d7 d8d7 f5d7 e2c4 g1b1 c6e5
>38170 <first : 9 28 348 1730028 g7c7
>38830 <first : 9 27 416 2163660 g7c7 b2e2
>40370 <first : 9 38 573 3363792 h2h3
>Interrupting first
>40810 >first : .
>40920 <first : stat01: 623 3652080 9 17 35
>41030 <first : 9 37 632 3726660 h2h3 b2e2 h1h2 e2e5 g7g3 h7h5
>41190 <first : 9 48 651 3811724 h2h4
>42230 <first : 9 47 756 4458074 h2h4 b2e2 h1h2
>42730 <first : 9 58 802 4838186 g1e1
>Interrupting first
>42840 >first : .
>42890 <first : stat01: 821 4902676 9 15 35
>Interrupting first
>44870 >first : .
>44930 <first : stat01: 1026 5752998 9 15 35
>44930 <first : 9 121 1026 5754144 g1e1 h7h5 e1g1 d8d2 g7g8 c6d8 g8h8 b2e5
>45200 <first : 9 132 1054 5909160 g7f7
>45370 <first : 9 131 1065 5995034 g7f7 b2e2 b1h7
>46240 <first : 9 140 1150 6440532 g1f1 b2d2 b1h7 d2a2 h7b1 a2a1 f1g1
>47010 <first : 9 151 1228 6788046 b1h7
>47620 <first : 9 163 1286 7044318 b1h7 b2a2 g7f7 d8h8 h7e4 a2c4 f7f6 c4d4 g1d4
>c6d4
>47620 <first : 10 163 1297 7051126 b1h7 b2a2 g7f7 d8h8 h7e4 a2c4 f7f6 c4d4 g1d4
>c6d4
>51740 <first : 10 151 1704 8883848 b1h7 b2e2 g7g8 d8g8 h7g8 e2a2 h2h4 a2e2 g8d5
>e2e5
>53820 <first : 11 151 1917 10047346 b1h7 b2e2 g7g8 d8g8 h7g8 e2a2 h2h4 a2e2 g8d5
>e2e5
>56520 <first : 11 156 2179 11584474 b1h7 b2a2 h7g8 c6b4 h2h4 a2e2 g8f7 e2e5 g7h7
>63160 <first : 12 156 2851 15707274 b1h7 b2a2 h7g8 c6b4 h2h4 a2e2 g8f7 e2e5 g7h7
>
>
>
>Uri



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