Author: Uri Blass
Date: 05:45:26 01/06/03
Go up one level in this thread
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. [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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