Author: Enrique Irazoqui
Date: 15:54:49 08/30/00
Go up one level in this thread
On August 30, 2000 at 16:01:52, Peter McKenzie wrote: >This position is what could have happened in Nimzo - Shredder in London. >Is from the possible variation 24...Qxb4 25.Qxd5 > >Even this position requires 13ply (about 7.5 hours on my P133) for Lambchop to >return a really bad score (see output below). I'd be interested in how other >programs go on this position. (Note the terrible branching factor at depth 12 >and 13) > >[D]r3rb1k/6p1/p2p3p/1ppQ4/Pq6/5NRP/5PP1/1B2R1K1 b - - > > _______________________ Black to play > 8 |br|__|__|__|br|bb|__|bk| > 7 |__|__|__|__|__|__|bp|__| > 6 |bp|__|__|bp|__|__|__|bp| > 5 |__|bp|bp|WQ|__|__|__|__| > 4 |WP|bq|__|__|__|__|__|__| > 3 |__|__|__|__|__|WN|WR|WP| > 2 |__|__|__|__|__|WP|WP|__| > 1 |__|WB|__|__|WR|__|WK|__| > a b c d e f g h > >Depth, score, time, nodes > > 0 0 0 0 e8e1 > 1 204 0 57 e8e1 f3e1 b4e1 g1h2 > 2 204 0 228 e8e1 f3e1 b4e1 g1h2 > 3 225 0 487 e8e1 f3e1 b4e1 g1h2 a8e8 > 4 280 0 1451 e8e1 f3e1 a8e8 g1h2 b4b1 > 5 209 100 5007 e8e1 f3e1 a8e8 d5f5 e8e1 g1h2 h8g8 f5h7 g8f7 h7g6 f7e7 > 6 209 200 10404 e8e1 f3e1 a8e8 d5f5 e8e1 g1h2 h8g8 > 7 73 700 68142 e8e1 f3e1 b4e1 g1h2 e1b1 d5a8 b1f5 g3f3 f5e5 h2h1 > 8 73 1100 118111 e8e1 f3e1 b4e1 g1h2 e1e8 d5d3 g7g6 > 9 32 2600 286579 e8e1 f3e1 b4e1 g1h2 e1e8 g3e3 e8b8 d5f5 d6d5 h2h1 g7g6 f5g >6 >10 -25 7200 826264 e8e1 f3e1 b4e1 g1h2 e1e8 g3e3 e8d8 d5d3 g7g6 d3g6 a8a7 b1a >2 >11 32 14700 1740365 e8e1 f3e1 b4e1 g1h2 e1e8 g3e3 e8b8 d5f5 g7g6 f5g6 b8b7 > >12 -19 441600 53229976 e8e1 f3e1 b4e1 g1h2 e1e8 g3e3 e8d8 d5d3 g7g6 d3g6 d8d7 b >1e4 d6d5 g6f6 h8g8 > >13 -112 2648900 320991614 e8e1 f3e1 a8e8 d5f5 e8e1 g1h2 h8g8 f5h7 g8f7 g3f3 f7e8 >Q b1g6 e8d7 f3f8 e1e7 a4b5 a6b5 h7g8 b4c4 g6f5 d7c7 Analysis by Fritz 6b and Junior 6a on P600E with 184MB hash: r3rb1k/6p1/p2p3p/1ppQ4/Pq6/5NRP/5PP1/1B2R1K1 b - - 0 1 Analysis by Fritz 6: 1...Qxe1+-- +- (1.56) Depth: 1/7 00:00:00 1...Qxe1+-- +- (1.56) Depth: 1/7 00:00:00 1...Rxe1+! ± (1.28) Depth: 1/7 00:00:00 1...Rxe1+! 2.Nxe1 Qxe1+ 3.Kh2 -+ (-1.91) Depth: 1/11 00:00:00 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 -+ (-1.91) Depth: 2/9 00:00:00 1...Rxe1+! -+ (-2.22) Depth: 3/11 00:00:00 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Rb8 4.Qf5 bxa4 -+ (-2.44) Depth: 4/15 00:00:00 2kN 1...Rxe1+-- -+ (-2.13) Depth: 5/13 00:00:00 5kN 1...Rxe1+-- 2.Nxe1 Re8 3.Qf5 Rxe1+ 4.Kh2 Kg8 5.Qh7+ Kf7 -+ (-1.97) Depth: 5/15 00:00:00 12kN 1...Rxe1+-- -+ (-1.66) Depth: 6/20 00:00:00 26kN 1...Rxe1+-- -+ (-1.66) Depth: 6/20 00:00:00 38kN 1...Rxe1+-- µ (-1.34) Depth: 7/19 00:00:00 78kN 1...Rxe1+-- 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Qd3 g6 5.Rxg6 Qe5+ 6.g3 µ (-0.94) Depth: 7/22 00:00:00 121kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Re3 Qb8 5.Qf5 d5+ 6.Kg1 µ (-0.81) Depth: 8/24 00:00:00 220kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Qd3 g6 5.Rxg6 Ra7 6.Bc2 µ (-0.75) Depth: 9/24 00:00:01 473kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Re3 Qb8 5.Qd3 d5+ 6.g3 ³ (-0.59) Depth: 10/26 00:00:02 1038kN 1...Rxe1+-- ³ (-0.28) Depth: 11/29 00:00:04 2138kN 1...Rxe1+-- ³ (-0.28) Depth: 11/29 00:00:04 2453kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Qd3 g6 5.Rxg6 Qe5+ 6.g3 ³ (-0.31) Depth: 12/30 00:00:08 4509kN 1...Rxe1+-- = (0.00) Depth: 13/31 00:00:19 9791kN 1...Rxe1+-- 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Re3 Qb8 5.Qd3 d5+ 6.Rg3 = (0.00) Depth: 13/34 00:00:23 12369kN 1...Rxe1+-- ² (0.47) Depth: 14/37 00:00:53 27467kN 1...Rxe1+-- 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Re3 Qb8 5.Qf7 d5+ 6.Kh1 ± (0.84) Depth: 14/37 00:01:18 40192kN 1...Rxe1+-- ± (1.16) Depth: 15/38 00:03:14 99255kN 1...Rxe1+-- 2.Nxe1 Qxb1 3.Qxa8 Qxe1+ 4.Kh2 Qxf2 5.Rf3 Qd4 6.Qxf8+ +- (1.94) Depth: 15/41 00:08:39 255497kN 1...Rxe1+ 2.Nxe1 Qxb1 3.Qxa8 Qxe1+ 4.Kh2 Qxf2 5.Rf3 Qd4 6.Qxf8+ +- (1.94) Depth: 16/41 00:15:20 463718kN 1...Rxe1+ 2.Nxe1 Qxb1 3.Qxa8 Qxe1+ 4.Kh2 Qxf2 5.Rf3 Qd4 6.Rxf8+ +- (2.00) Depth: 17/44 00:25:54 786886kN 1...Rxe1+-- +- (2.31) Depth: 18/45 00:50:32 1542232kN 1...Rxe1+-- 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Re3 Be7 5.Rxe7 Qf8 6.Qd3 +- (2.44) Depth: 18/45 01:01:47 1882796kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Re3 Be7 5.Rxe7 Qf8 6.Qd3 +- (2.62) Depth: 19/46 02:08:07 3930647kN (Irazoqui, Cadaqués 31.08.2000) r3rb1k/6p1/p2p3p/1ppQ4/Pq6/5NRP/5PP1/1B2R1K1 b - - 0 1 Analysis by Junior 6.0: 1...c4 2.Rxe8 Rxe8 +- (1.97) Depth: 3 00:00:00 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Re8 4.Bg6 Re2 5.axb5 axb5 -+ (-2.01) Depth: 6 00:00:00 5kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Re8 4.Bg6 Re2 5.axb5 axb5 -+ (-2.01) Depth: 6 00:00:00 5kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Re8 4.Bg6 Re2 5.axb5 axb5 -+ (-2.01) Depth: 6 00:00:00 5kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Qd3 g6 5.Rxg6 Ra7 6.axb5 axb5 = (-0.05) Depth: 9 00:00:01 420kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Re3 Qb8 5.Qf5 d5+ 6.Rg3 Kg8 7.Qe6+ Kh8 = (0.00) Depth: 12 00:00:03 1352kN 1...Rxe1+ 2.Nxe1 ² (0.30) Depth: 14 00:00:15 6560kN 1...Rxe1+ 2.Nxe1 Re8 3.Qf5 Rxe1+ 4.Kh2 Kg8 5.Qh7+ Kf7 6.Bg6+ Ke6 7.Qg8+ Kd7 8.Qxf8 Qd4 9.Bd3 Qxa4 10.Rxg7+ Kc6 +- (2.17) Depth: 16 00:03:37 105882kN 1...Rxe1+ 2.Nxe1 Re8 3.Qf5 Rxe1+ 4.Kh2 Kg8 5.Qd5+ Kh8 6.Qf7 Qc4 7.Qxf8+ Qg8 8.Qxd6 c4 9.Qb4 Re5 10.axb5 axb5 +- (2.21) Depth: 17 00:05:49 166460kN 1...Rxe1+ 2.Nxe1 Re8 3.Qf5 Rxe1+ 4.Kh2 Kg8 5.Qd5+ Kh8 6.Qf7 Qc4 7.Qxf8+ Qg8 8.Qxd6 c4 9.Qb4 Re6 10.axb5 Rb6 +- (2.41) Depth: 18 00:13:30 380296kN 1...Rxe1+ 2.Nxe1 Re8 3.Qf5 Rxe1+ 4.Kh2 Kg8 5.Qd5+ Kh8 6.Qf7 Qc4 7.Qxf8+ Qg8 8.Qxd6 c4 9.Qb4 Re6 10.axb5 Rb6 +- (2.30) Depth: 19 00:21:43 602710kN 1...Rxe1+ 2.Nxe1 +- (2.60) Depth: 20 01:06:06 1912700kN 1...Rxe1+ 2.Nxe1 Qxe1+ 3.Kh2 Qe8 4.Re3 Be7 5.Rxe7 Qg8 6.Qxd6 bxa4 7.Bg6 Rc8 8.Qd7 a3 9.Bf7 Qf8 10.Re3 Rd8 +- (2.65) Depth: 21 02:05:38 3715628kN (Irazoqui, Cadaqués 31.08.2000)
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