Author: Uri Blass
Date: 07:35:19 06/04/01
Go up one level in this thread
On June 04, 2001 at 10:12:36, Christophe Theron wrote: >On June 04, 2001 at 05:29:47, José Carlos wrote: > >>On June 04, 2001 at 04:30:03, Slater Wold wrote: >> >>>On June 04, 2001 at 03:36:25, Rudolf Huber wrote: >>> >>>> >>>>A couple of days ago I said (in a discussion about mtd(f)) that my chess >>>>program can search the starting position to 30 ply over night when the eval >>>>evaluates material only: >>>> >>>> >>>>SOS no eval >>>> 1.00 0:00 0.00 1.h3 (2) >>>> 2.00 0:00 0.00 1.h3 (45) >>>> 3.00 0:00 0.00 1.h3 h6 2.h4 (138) >>>> 4.00 0:00 0.00 1.h3 h6 2.h4 (263) >>>> 5.00 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 (435) >>>> 6.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 (1.860) >>>> 7.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 (1.942) >>>> 8.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 (2.024) >>>> 9.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 (5.086) >>>> 10.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 (16.891) >>>> 11.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (41.424) >>>> 12.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (94.654) >>>>463.9 >>>> 13.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (132.293) >>>>497.3 >>>> 14.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (245.124) >>>>505.4 >>>> 15.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (359.203) >>>>533.7 >>>> 16.01 0:01 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (714.937) >>>>593.8 >>>> 17.01 0:02 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (1.212.436) >>>>570.2 >>>> 18.01 0:02 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (1.729.490) >>>>585.4 >>>> 19.01 0:05 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (3.025.316) >>>>605.0 >>>> 20.01 0:08 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (4.700.415) >>>>587.5 >>>> 21.01 0:15 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (9.323.868) >>>>621.5 >>>> 22.01 0:29 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (16.881.247) >>>>582.1 >>>> 23.01 0:48 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (28.659.953) >>>>597.0 >>>> 24.01 1:36 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (56.472.536) >>>>588.2 >>>> 25.01 3:37 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 >>>>(127.308.632) 586.6 >>>> 26.01 7:41 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 >>>>(275.114.597) 596.7 >>>> 27.01 17:31 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 >>>>(622.179.104) 591.9 >>>> 28.01 45:16 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 >>>>(1.602.666.536) 590.0 >>>> 29.01 80:46 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 >>>>(-1452508008) 586.5 >>>> 30.01 161:28 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 >>>>(1.397.948.590) 587.6 >>>> 31.01 513:07 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 >>>>(471.878.568) 573.3 >>>> >>>> >>>>Actually 30 ply was reached after 2:41 hours. >>>> >>>>SW: no search extensions, normal nullmove pruning, normal quiescence >>>> search >>>>HW: 2xCeleron 466 MHz, 500 MByte Hash >>>> >>>> >>>>Can anyone do better? >>>> >>>> >>>>Rudolf >>> >>>h3? Amazing. Now we all know why computers use opening books! :) >>> >>> >>>Slate >> >> I think you misunderstood him. He said 'material only', which means that the >>program choses the first move it generates and sticks to it unless it sees it's >>losing material. 'h3' is just a move that doesn't lose material in 30 plies. >>There are a lot of others, but the program doesn't mind, since he thinks they >>all are worth the same. >> >> José C. > > > >The fact that h3 was not losing material after 30 plies was not obvious, at >least to me. > >As someone else said, a tool like this one could be useful to improve opening >theory by computing exactly which opening lines could lead to forced loss of >material. > > > > Christophe It seems obvious to me because I do not think that h3 is worse then losing a tempo and losing a tempo does not seem to lose material because black does not lose material in 30 plies from the opening position. I guess that even losing more tempos is not enough to lose material and the relevant program is going to see 0.00 after 30 plies with no extensions even if you start with the position after 1.e4 a6 2.d4 h6 Uri
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