Author: Omid David Tabibi
Date: 05:52:17 01/06/03
Go up one level in this thread
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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