Author: Uri Blass
Date: 06:51:56 09/03/03
Go up one level in this thread
On September 03, 2003 at 09:11:20, Slater Wold wrote: >On September 03, 2003 at 01:51:20, Uri Blass wrote: > >>On September 02, 2003 at 19:34:50, Slater Wold wrote: >> >>>On September 02, 2003 at 14:23:31, Uri Blass wrote: >>> >>>>I think that interesting positions is positions when there is no clear win for >>>>one side by many moves. >>>> >>>>1)Here is a position that did not happen in my correspondence game but could >>>>happen >>>> >>>>[D]3r1rk1/pp4pp/1n3p2/4pN2/7Q/b1P1B3/Pq3PPP/R4RK1 w - - 0 20 >>>> >>>>How much time does your program need to find Bh6 with a draw? >>> >>>Rebel 12.0 (q3) - P4 3.06Ghz - 200MB HTs >>> >>>00:00:00.2 -0.59 1 17 Bxb6 Qxb6 >>>00:00:00.2 0.01 1 77 Qh5 Qxc3 >>>00:00:00.2 -0.33 2 370 Qh5 h6 >>>00:00:00.2 -0.33 2 779 Rab1 >>>00:00:00.2 0.45 2 1037 Rab1 Qc2 Bxb6 axb6 >>>00:00:00.2 0.58 3 2894 Rab1 Qxa2 Bxb6 axb6 >>>00:00:00.2 0.67 4 11251 Rab1 Qe2 Bxb6 axb6 Rfe1 Qxa2 >>>00:00:00.2 0.67 4 31274 Bh6 >>>00:00:00.2 1.21 4 32849 Bh6 Qc2 Qg4 g6 Bxf8 >>>00:00:00.3 -0.21 5 47782 Bh6 Rd7 Nxg7 Rxg7 Bxg7 Kxg7 Qh5 Kg8 >>>00:00:00.3 0.50 5 60454 Rab1 Qxa2 Bxb6 axb6 Rxb6 Qf7 Rfb1 >>>00:00:00.4 0.64 5 112112 Qg4 g6 Bxb6 Qxb6 Qc4+ Kh8 >>>00:00:00.4 -0.10 6 147067 Qg4 g6 Rab1 Qxa2 Bxb6 axb6 Rxb6 Qd5 >>>00:00:00.4 0.26 6 169928 Rab1 Qxa2 Bxb6 axb6 Rxb6 Rf7 Rfb1 Qc2 >>>00:00:00.7 0.07 7 414375 Rab1 Qxa2 Bxb6 axb6 Ra1 Qb3 Rab1 Qxc3 >>>00:00:01.6 0.34 8 1133544 Rab1 Qc2 Bxb6 axb6 Qg4 g6 Nh6+ Kh8 >>>00:00:03.4 0.53 9 2779835 Rab1 Qe2 Bh6 Rf7 Bxg7 Rxg7 Nxg7 Kxg7 >>>00:00:03.5 0.62 9 2858321 Qg4 g6 Rab1 Qc2 Bxb6 axb6 Qc4+ Kh8 >>>00:00:05.6 0.52 10 4889928 Qg4 g6 Rab1 Qxc3 Rb3 Qa5 Bxb6 axb6 >>>00:00:13.0 -0.13 11 11893522 Qg4 g6 Rab1 Qxa2 Bxb6 axb6 Rxb6 Kh8 >>>00:00:20.8 0.22 11 18906143 Rab1 Qe2 h3 Rf7 Bxb6 axb6 Rbe1 Qd2 >>>00:01:03.1 0.41 12 58733576 Rab1 Qe2 Rfe1 Qc4 Qxc4+ Nxc4 Rxb7 Rf7 >>>00:01:21.7 0.41 12 77008033 Bh6 >>>00:01:27.5 0.69 12 81518907 Bh6 Rd7 Qg4 Rff7 Rad1 Bf8 Bc1 >>>00:02:06.7 0.69 13 110129864 Bh6 Rd7 Qg4 Rff7 Rad1 Bf8 Bc1 >>>00:06:05.8 0.75 14 286909260 Bh6 Rd7 Rad1 Rxd1 Rxd1 Qe2 Rf1 Qc4 >>> >>>>Here is a position from one of my correspondence games(my opponet resigned after >>>>44...Rc1+). >>>> >>>> >>>>2)It may be interesting to see how much time programs need to find 26.Rh3(I >>>>believe that 26.Rxh5 was the losing move of white inspite of the fact that >>>>white's position is not good even after 26.Rh3) >>>> >>>>I suspect that programs may need at least some hours. >>>> >>>>[D]5krr/1b2qp2/pp1ppp2/2n2Pbp/P1RNP2R/2N2BP1/2P1Q2P/7K w - - 0 26 >>> >>>q3 didn't get this in ~15 minutes. >>> >>>00:10:08.9 -0.40 15 510937279 fxe6 fxe6 >> >>fxe6? >> >>I did not think that it can be good because of Bxh4 >>I thought that the only alternative that programs may consider is Rxh5 >> >>The main line suggest that q3 even does not expect Bxh4 >> >>I analyzed the position after fxe6 Bxh4 for some minutes with Fritz8 and saw >>nothing for white(Nd5 -1.41/13,-1.56/14,-1.56/15) > >In 2 hours, it goes back to Rxh5. I do not know what you use but it seems crazy. In the Bh6 problem it does not expect black to capture the bishop and evaluates it as advantage for white. In the second problem it likes to sacrifice material for king attack that does not exist. I suspect that you use something to solve test position and not to play games and I am not surprised if it fails in my tests. My test positions were about tactics and I guess that overevaluating king safety is not going to help. Uri
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