Author: Uri Blass
Date: 07:17:12 12/08/02
Go up one level in this thread
On December 08, 2002 at 10:11:58, Uri Blass wrote: >On December 08, 2002 at 09:50:14, Ulrich Tuerke wrote: > >>On December 08, 2002 at 09:36:28, Art Basham wrote: >> >>>Ruffian takes 9 ply to find.. >>>R(f1)xf5...! >> >>Comet needs 1o plies (but I guess that seconds are more interesting). >> >>Analysis by Comet B54: >> >>... >>1.g4 hxg5 2.Rxf8+ Qxf8 3.gxf5 exf5 4.Bxg5 >> +- (1.78) Depth: 6/26 00:00:00 204kN >>1.g4 hxg5 2.Rxf8+ Qxf8 3.gxf5 exf5 4.Bxg5 >> +- (1.78) Depth: 6/26 00:00:00 216kN >>1.Qg6 Rxf7 2.Nxf7 Qf8 3.Nxh6+ Nxh6 4.Rxf8+ Rxf8 >> +- (2.05) Depth: 6/26 00:00:00 254kN >>1.Qg6 Nxe3 2.Rxf8+ Qxf8 3.Rxf8+ Kxf8 4.Nxe6+ Ke7 >> +- (2.58) Depth: 6/26 00:00:00 274kN >>1.Qg6 Rxf7 2.Nxf7 Qe7 3.g4 >> +- (2.81) Depth: 6/29 00:00:00 347kN >>1.Qg6 Rxf7 2.Nxf7 Qe7 3.g4 >> +- (2.80) Depth: 7/29 00:00:01 505kN >>1.Qg6 Rxf7 2.Nxf7 Qe7 3.g4 >> +- (2.53) Depth: 7/29 00:00:01 793kN >>1.Qg6 Rxf7 2.Nxf7 Qe8 3.d5 >> +- (2.00) Depth: 7/29 00:00:02 1149kN >>1.Qg6 Rxf7 2.Nxf7 Qe8 3.Rxf5 exf5 4.Nxh6+ Kh8 5.Nf7+ Kg8 >> +- (1.52) Depth: 7/29 00:00:03 1550kN >>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 hxg5 4.Qxg5 Kg8 >> +- (1.52) Depth: 8/29 00:00:04 2056kN >>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 hxg5 4.Qg6 Kg8 >> +- (1.79) Depth: 8/29 00:00:04 2124kN >>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 exf5 4.Nf7+ Kg8 5.Nxd8 Rxd8 6.d5 >> +- (1.83) Depth: 8/29 00:00:04 2246kN >>1.Qg6 Rxf7 2.Qxf7+ Kh8 >> +- (1.83) Depth: 9/29 00:00:06 3314kN >>1.Qg6 Rxf7 2.Qxf7+ Kh8 >> +- (1.83) Depth: 9/30 00:00:07 3671kN >>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 exf5 4.Nf7+ Kg8 5.Nxd8 Kh8 >> +- (1.83) Depth: 10/37 00:00:12 6956kN >>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 exf5 4.Nf7+ Kg8 5.Nxd8 Rxd8 6.d5 Bc8 7.d6 >> +- (2.10) Depth: 10/37 00:00:13 8042kN >>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 exf5 4.Nf7+ Kg8 5.Nxd8 Rxd8 6.g3 >> +- (2.10) Depth: 10/37 00:00:15 8790kN >>1.R1xf5 exf5 2.Rxg7+ Kxg7 3.Ne6+ Bxe6 4.Bxh6+ Kh8 5.Bg5+ Kg8 6.Bxd8 Rf6 >> +- (2.63) Depth: 10/37 00:00:19 11004kN >>1.R1xf5 exf5 2.Rxg7+ Kxg7 3.Ne6+ Bxe6 4.Bxh6+ Kh8 5.Bg5+ Kg8 6.Bxd8 Rf6 >> +- (3.42) Depth: 10/37 00:00:22 12660kN >>1.R1xf5 exf5 2.Rxg7+ Kxg7 3.Ne6+ Kh8 4.Nxd8 Raxd8 5.Bxh6 Rg8 6.Bg5+ Kg7 >> +- (4.47) Depth: 10/37 00:00:24 13771kN >>1.R1xf5 exf5 2.Rxg7+ Kxg7 3.Ne6+ Bxe6 4.Bxh6+ Kh8 5.Bg5+ Kg7 6.Qh6+ Kg8 7.Qxe6+ >>Kg7 8.Bxd8 Raxd8 9.Qxc4 >> +- (4.73) Depth: 10/37 00:00:28 16435kN > >Ruffian like movei finds Qg6 at depth 13 but later changes it's mind again to >Rf1xf5 at the time of writing these lines ruffian has a fail high for Rxf5 at >depth 15. > >It seems that the position is a bad test position. > >Uri The right reason to find R1xf5 is not 2.Rxg7+ but 2.Qg6 Here is ruffian's analysis after finishing depth 15. depth=16 1/41(R1xf5) +6.27 R1xf5 exf5 Qg6 Rxf7 Qh7+ Kf8 d5 Ke8 Bc5 Ba4 e6 Qe7 exf7+ Qxf7 Nxf7 Kxf7 Qxf5+ Kg8 Qe6+ Kh8 d6 Ruffian has another fail high a depth 16 for R1xf5 depth=17 1/41(R1xf5) +6.94 R1xf5 exf5 Qg6 Rxf7 Qh7+ Kf8 d5 Ke8 Bc5 Ba4 e6 Qe7 Bxe7 Kxe7 Nxf7 Kf6 Kf2 f4 Kf3 Nodes: 357800584 NPS: 637984 Time: 00:09:20.83 Uri
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