Author: Uri Blass
Date: 13:25:45 09/11/03
Go up one level in this thread
On September 11, 2003 at 16:01:12, Anthony Cozzie wrote: >On September 11, 2003 at 14:00:02, Ed Schröder wrote: > >>I am currently trying singular extensions again, while running test positions I >>got this amazing result: >> >>[d]8/pR4pk/1b6/2p5/N1p5/8/PP1r2PP/6K1 b - - bm Rxb2; >> >>Found after just 9 seconds and 11 plies. Without the algoritm it takes 14 or 15 >>plies and several minutes of course. I am now looking for the crazy game Gandalf >>vs Ferret of a few years ago during the WCM in Maastricht (I believe) where >>Ferret miraculous won from a lost position due to singular extensions. >> >>Thanks in advance, >> >>Ed > >Maybe your pruning is hurting you? Zappa gets it in 21 seconds (P4-2.4). > >1... c4-c3 2. b2xc3 Rd2xa2 3. Na4xb6 a7xb6 4. Rb7xb6 Ra2-a3 5. c3-c4 Ra3-c3 6. >Rb6-b7 Rc3xc4 7. Kg1-f2 Rc4-c2 8. Kf2-f1 > = (-0.23) Depth: 13/22 00:00:08.01 5143kN >1... Rd2xb2 2. Na4xb2 c4-c3 3. Rb7xb6 c5-c4 4. Rb6-b4 a7-a5 5. Rb4-b5 c3-c2 6. >Kg1-f2 c2-c1=Q 7. Kf2-g3 Qc1-a1 8. a2-a4 c4-c3 > + (0.07) Depth: 14/24 00:00:20.56 14077kN > = (1.72) Depth: 14/25 00:00:56.07 38094kN > = (1.72) Depth: 15/29 00:01:32.84 62357kN the depth is the same depth and rebel also find it at depth 14-15 without singular extensions. Uri
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