Author: Ernst A. Heinz
Date: 13:45:41 01/24/00
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Hi Dann, >These positions in BS2830 were analysed by Crafty at C.A.P. time controls, and >we got the wrong answer. So I reanalyzed them at long time controls, and >*still* got the wrong answer. I have not tried with Hiarcs or Rebel yet. Does >anyone have good EPD results for these? If so, what was the program used and >what was the time control? Yes, those node counts are over one Billion! "DarkThought WCCC'99" solves four of them within the BS-2830 time limits according to our WWW pages. I have quickly rerun them on a 500MHz Compaq Alpha-21264 XP1000 to provide you with the critical iteration outputs below. >r1b1r1k1/ppp2ppp/2nb1q2/8/2B5/1P1Q1N2/P1PP1PPP/R1B2RK1 w - - acd 14 acn >1355889197; ce 38; pv Qc3 Ne5 Bb2 Nxf3+ Qxf3 Qxf3 gxf3 Be6 Rfe1 Bxc4 bxc4 f5 d3 >Kf7 Kg2 Bf4 Bd4; pm Qc3; bm Bb2; id "BS2830.12"; 00:01:09 12.01 Qc3 Ne5 Kh1 Bg4 Bb5 c6 Be2 Nd7 Qxf6 =0.30 #24949439 00:01:49 12.09 Bb2 Qxb2 Ng5 Nd8 Qxh7+ Kf8 Rae1 Ne6 c3 Bxh2+ >=0.31! #39031802 00:04:23 13.01 Bb2 Qxb2 Ng5 Nd8 Qxh7+ Kf8 Rae1 Ne6 c3 Bf4 =0.62 #93230308 00:09:55 14.01 Bb2 Qxb2 Ng5 Nd8 Qxh7+ Kf8 Rae1 Ne6 c3 Bf4 =0.62 #205710911 >r1b1qrk1/ppBnppb1/2n4p/1NN1P1p1/3p4/8/PPP1BPPP/R2Q1R1K w - - acd 15 acn >1325306616; ce -18; pv Nb3 Ndxe5 N5xd4 Nxd4 Nxd4 Nc6 c3 Bxd4 cxd4 Qd7 Be5 f6 >Qc2 Kg7 Bg3 Nxd4 Qc4 Nxe2 Qxe2; pm Nb3; bm Ne6; id "BS2830.17"; 00:03:34 13.01 Nd3 a6 Na3 Ncxe5 Nxe5 Nxe5 Qxd4 Nc6 Qd5 Bxb2 <=0.11? #66665887 00:03:47 13.01?Nd3 a6 Na3 Ncxe5 Nxe5 Nxe5 Qxd4 Nc6 Qb6 Bd4 =0.05 #70955297 00:07:05 13.11 Ne6 fxe6 Bh5 Rf7 f4 Kh7 Qd3+ Kh8 Bxf7 Qxf7 >=0.06! #133470453 00:08:12 14.01 Ne6 fxe6 Bh5 Rf7 f4 Kh8 Bxf7 Qxf7 fxg5 Qg6 =0.22 #156317104 >r2qr2k/pbp3pp/1p2Bb2/2p5/2P2P2/3R2P1/PP2Q1NP/5RK1 b - - acd 17 acn 1280149593; >ce 156; pv Bd4+ Kh1 Qf6 f5 Bxb2 Rd7 Rac8 Re1 Bc3 Rf7 Qxf7 Bxf7 Rxe2 Rxe2 Rd8 >Kg1 Bf3; pm Bd4+; bm Qxd3; id "BS2830.22"; 00:03:20 14.01 Bd4+ Kh1 Qf6 f5 Bxb2 Rd7 Qe5 Qxe5 Bxe5 Bd5 =1.33 #76998730 00:04:04 14.04 Qxd3 Qxd3 Bd4+ Kh1 Rxe6 f5 Re3 Qc2 Rae8 Rg1 >=1.34! #92751060 00:04:40 15.01 Qxd3 Qxd3 Bd4+ Rf2 Rxe6 Kf1 Bxf2 Kxf2 Rae8 Nh4 =1.70 #107118012 00:07:11 16.01 Qxd3 Qxd3 Bd4+ Rf2 Rxe6 Kf1 Bxf2 Kxf2 Rae8 Nh4 =1.68 #163925251 >5r2/1p4r1/3kp1b1/1Pp1p2p/2PpP3/q2B1PP1/3Q2K1/1R5R b - - acd 16 acn 1187546978; >ce 71; pv Qa8 Ra1 Qd8 Be2 Qf6 Rh3 Bxe4 fxe4 Qf2+ Kh1 Rxg3 Rh2 Qe3 Qxe3 Rxe3 Bf1 >Rxe4 Bg2 Re2 Rxh5; pm Qa8; bm Rxf3; am Kombinie; id "BS2830.23"; 00:00:45 12.01 Ra8 Ra1 Qxa1 Rxa1 Rxa1 f4 Kc7 fxe5 Kb8 Qf4 =1.38 #16983773 00:00:54 12.30 Rxf3 Kxf3 Bxe4+ Kxe4 Rxg3 Rxh5 Qa2 Rd1 Qxd2 Rh3 >=1.39! #20550580 00:00:59 13.01 Rxf3 Kxf3 Bxe4+ Kxe4 Rxg3 Rxh5 Qa2 Qh2 Qxh2 Rb4 >=1.77! #23008521 00:03:35 14.01!Rxf3 Kxf3 Bxe4+ Kf2 =4.08 #84347789 00:06:39 15.01 Rxf3 Kxf3 Bxe4+ Ke2 Bxh1 =4.28 #157616769 Hope this helps, =Ernst= P.S. WWW pages of "DarkThought" at http://supertech.lcs.mit.edu/~heinz/dt/. "Scalable Search in Computer Chess" now at Amazon.de and MKP online. http://www.amazon.de/exec/obidos/ASIN/3528057327/ http://www.mkp.com/books_catalog/3-52805-732-7.asp :-) Please visit http://supertech.lcs.mit.edu/~heinz/node1.html for more information about the book. +--------------------------------------------------------------------------+ | Ernst A. Heinz, M.I.T. Lab for CS, NE 43-228, 545 Technology Square, | | Cambridge, MA 02139, USA. WWW: <http://supertech.lcs.mit.edu/~heinz/> | | Tel. / Fax: +1-617-253 8853 / 253 0415 E-Mail: <heinz@mit.edu> | +--------------------------------------------------------------------------+ "It has recently been found out that research causes cancer in rats!"
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