Author: Robert Hyatt
Date: 19:43:58 02/11/03
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On February 11, 2003 at 18:50:42, Sune Fischer wrote: >On February 11, 2003 at 15:58:13, Robert Hyatt wrote: > >>I'm not sure whether you still want me to play with the aspiration window >>and post results or not. I ran this on my laptop and got Nb3 every time, >>with a score of about -1.0: >> >> 7-> 1.60 -1.03 1. Nb3 Qf6 2. Bb2 Bf3 3. Qd3 Qc6 4. >> e4 >> 8 2.42 -1.13 1. Nb3 exd4 2. Nxd4 c5 3. bxc5 Nxc5 >> 4. Bd2 Bc4 5. Re1 Qf6 >> 8-> 3.10 -1.13 1. Nb3 exd4 2. Nxd4 c5 3. bxc5 Nxc5 >> 4. Bd2 Bc4 5. Re1 Qf6 >> 9 6.81 -0.96 1. Nb3 exd4 2. Nxd4 c5 3. bxc5 Nxc5 >> 4. Bd2 Ne6 5. Nxe6 Qxe6 6. Rc1 >> 9-> 7.60 -0.96 1. Nb3 exd4 2. Nxd4 c5 3. bxc5 Nxc5 >> 4. Bd2 Ne6 5. Nxe6 Qxe6 6. Rc1 >> 10 18.36 -1.19 1. Nb3 Qf6 2. Bd3 Qh4 3. Bxb5 Qxh3 >> 4. f3 Nb8 5. dxe5 Qg3+ 6. Kh1 Bxe5 >> 10-> 22.43 -1.19 1. Nb3 Qf6 2. Bd3 Qh4 3. Bxb5 Qxh3 >> 4. f3 Nb8 5. dxe5 Qg3+ 6. Kh1 Bxe5 >> time=23.28 cpu=99% mat=0 n=8188457 fh=91% nps=351k >> >> >>If you want me to run with different aspiration windows, let me know... > >Just a quick question. What happens if you run with material eval only? >Does this increase instability? > >It does in my case. > >-S. Define "instability". Score changes? If it does, you must have a bug. But it should be possible to get somewhat different PVs if your move ordering is not deterministic... ie dependent on alpha/beta values. But that would be because all moves that don't lose material get scored as zero by the search...
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