Author: Amir Ban
Date: 01:35:31 01/18/00
Go up one level in this thread
On January 17, 2000 at 16:45:25, Ernst A. Heinz wrote: >On January 17, 2000 at 10:32:34, Vincent Diepeveen wrote: > >>Diep also plays Rc7 like deep blue, >> >>[d]6rk/1N3p1p/5q2/3Q4/3p4/PP1n1pPP/5P2/2R3K1 w - - >> >>I only see positional evaluation >>difference between the moves Rc6 and Rc7 though. > >I am not so sure about the "only positional difference". > >"DarkThought" fails low on Rc6 3x (in iterations 13, 15, and 17) >with an ever decreasing score before finally switching to Rc7 after >roughly 4 hours (see below). > >00:00:00 7.01 Rc6 Qf4 Rc8 Qe5 Rxg8+ Kxg8 Qxf3 Qe1+ =2.01 #124989 >00:00:00 8.01 Rc6 Qf4 Rc8 Qe5 Rxg8+ Kxg8 Qxf3 Qe1+ Kg2 =2.01 #225666 >00:00:01 9.01 Rc6 Qf4 Rc8 Qe5 Rxg8+ Kxg8 Qxf3 Qe1+ Kg2 Qc3 =1.98 #490304 >00:00:03 10.01 Rc6 Qf4 Rc8 Qe5 Rxg8+ Kxg8 Qxf3 Qe1+ Kg2 Qc3 =1.98 #1394856 >00:00:13 11.01 Rc6 Rg5 Rxf6 Rxd5 Rxf7 Ne5 Rf8+ Kg7 Rd8 Rb5 =2.05 #5338374 >00:00:32 12.01 Rc6 Qf4 Rc8 Qe5 Rxg8+ Kxg8 Qxf3 Qe1+ Kg2 Qc3 =2.12 #13548950 >00:01:19 13.01 Rc6 Rg5 Qe4 Qe5 Qxf3 Nxf2 Rc8+ Kg7 g4 Nxh3+ <=1.88? #32278966 >00:01:38 13.01?Rc6 Rg5 Qd8+ Qxd8 Nxd8 Kg8 Rc8 Rc5 Rb8 Kg7 =1.70 #40087316 >00:02:59 14.01 Rc6 Rg5 Qd8+ Qxd8 Nxd8 Kg8 Rc8 Rc5 Rb8 Kg7 =1.80 #71757951 >00:05:28 15.01 Rc6 Rg5 Qd8+ Qxd8 Nxd8 Rc5 Nxf7+ Kg7 Nd8 Rxc6 <=1.55? #128940219 >00:07:57 15.01?Rc6 Rg5 Qd8+ Qxd8 Nxd8 Rc5 Nxf7+ Kg7 Nd8 Rxc6 =1.55 #186015521 >00:24:16 16.01 Rc6 Rg5 Qd8+ Qxd8 Nxd8 Rc5 Nxf7+ Kg7 Nd8 Rxc6 =1.58 #547967256 >01:21:27 17.01 Rc6 Rg5 Qd8+ <=1.33? #1827972692 >02:09:21 17.01?Rc6 Rg5 Qd8+ Qxd8 Nxd8 Kg8 Rf6 Rc5 Nxf7 Rc1+ =1.28 #2906095348 >03:54:14 17.03 Rc7 Nf4 >=1.29! #5286556768 > >Maybe, early switching to Rc7 is either a positional "sniffing" >issue or the result of special extensions working well again. > >1. Amir, how does "Junior" evaluate Rc6 vs. Rc7? > It was about 1.2 for Rc6 vs. about 1.5 for Rc7 when Rc6 got replaced, which was after 2 minutes. I don't know when Junior sees the full problem with Rc6 because it already switched away from it based on positional factors. Amir >2. Bruce, what does "Ferret" do with this position? > >=Ernst=
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