Author: Ernst A. Heinz
Date: 13:45:25 01/17/00
Go up one level in this thread
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? 2. Bruce, what does "Ferret" do with this position? =Ernst=
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