Author: Drexel,Michael
Date: 15:51:16 11/20/03
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On November 20, 2003 at 17:09:12, Russell Reagan wrote: >On November 20, 2003 at 16:47:03, Uri Blass wrote: > >>The gap between Crafty and Shredder7.04 is 197 elo and even the optimistic >>prediction of 70 elo per doubling the speed do not give it 197 elo. > >Some people think 70 ELO is low for a 2x speedup. > >http://citeseer.nj.nec.com/ciancarini94comparison.html > >"For instance, some experiments found that improving 5 times the running time of >such an algorithm the playing strength of a chess programs improves about 200 >Elo points." > >Their reference for that is: > >K.Thompson, "Computer Chess Strength", Advances in Computer Chess 3, M.R.B. >Clarke (Ed.), Pergamon Press, (1982), 55-56. > >That would mean a 2x speedup was worth 80 ELO. 1982? C'mon, this is stone age in CC. 11 Chess Tiger 15.0 256MB Athlon 1200 MHz 2719 25 -24 824 60% 2647 20 Chess Tiger 15.0 128MB K6-2 450 MHz 2664 34 -33 433 52% 2648 17 Hiarcs 8.0 256MB Athlon 1200 MHz 2684 22 -22 996 53% 2663 40 Hiarcs 8.0 128MB K6-2 450 MHz 2586 33 -34 440 42% 2646 13 Deep Fritz 256MB Athlon 1200 MHz 2716 30 -29 571 61% 2641 25 Deep Fritz 128MB K6-2 450 MHz 2649 22 -21 1071 58% 2589 4 Deep Fritz 7.0 256MB Athlon 1200 MHz 2760 26 -25 778 67% 2635 23 Deep Fritz 7.0 128MB K6-2 450 MHz 2650 36 -35 392 54% 2623 14 Gambit Tiger 2.0 256MB Athlon 1200 2713 29 -29 583 58% 2654 26 Gambit Tiger 2.0 128MB K6-2 450 MHz 2640 28 -27 674 64% 2538 21 Shredder 5.32 256MB Athlon 1200 MHz 2660 26 -26 713 51% 2654 35 Shredder 5.32 128MB K6-2 450 MHz 2606 25 -25 759 54% 2580 76 points difference on average. However A 1200 256MB hash compared to K6 450 MHz 128MB hash is rather 3x than 2x speedup. So 2x speedup was worth on average 50-55 points at SSDF recently. Michael
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